CN104861987B - Soil improvement conditioner and its preparation method and application - Google Patents

Abstract

The invention discloses a moderate salinization soil improvement conditioner as well as its preparation method and application. Wherein, the soil improvement conditioner includes: 55-60 parts by weight of calcium salt, 18-23 parts by weight of biomass coke, 10-15 parts by weight of biomass aqueous solution and 10-12 parts by weight of organic fertilizer. The soil improvement conditioner can quickly and effectively improve various problems such as high soil alkalization degree, low fertility, high soil pH value and soil agglomeration, and the soil improvement conditioner has low price and low heavy metal content.

Description

Soil improvement conditioner and its preparation method and application

technical field

The present invention relates to the field of agriculture, in particular to a soil improvement conditioner and its preparation method and application, more specifically to a soil improvement conditioner, a method for preparing the soil improvement conditioner and a method for improving moderately salinized soil.

Background technique

There are large areas of saline-alkali land distributed in our country, and the degree of salinization is expanding. The salinization of land not only causes a large amount of agricultural production reduction in our country, but also causes a lot of losses. Due to the increasingly serious degree of salinization, large areas of land have gradually become wasteland. Transforming saline-alkali land and improving the agricultural production of saline-alkali cultivated land is one of the important tasks of agricultural development in my country.

The improvement of saline-alkali land in my country has a long history, and a variety of improvement methods and technologies have been developed. The agronomic or engineering technology methods involved can be mainly divided into: physical improvement (such as land leveling, deep plowing and sunning, terrace field improvement, etc.), water conservancy improvement ( Such as irrigation and drainage, washing and research, salt drainage in hidden pipes, etc.), chemical improvement (such as application of gypsum, phosphogypsum, humic acid, etc.), and biological improvement (such as planting of salt-tolerant plants, microbial improvement, etc.). These improved technologies all have certain effects, but also have certain deficiencies. For example, washing salt with fresh water can reduce the salinity of the soil, but the effect on reducing the alkalinity is not significant, and the water consumption is large, which may easily cause the loss of mineral elements necessary for plant growth. Biological improvement has poor universality, slow effect and relatively high cost.

The research and development of soil conditioner is the core of chemical improvement technology. Chinese patent application CN101624523 discloses "a kind of saline-alkali improver", which is prepared by mixing aluminum sulfate, ferrous ammonium sulfate and magnesium sulfate according to different weight ratios. It needs a large amount of chemical raw materials to make the improver, instead of using Industrial waste is expensive. Chinese patent application CN1377936A discloses "Using waste gypsum board to produce saline-alkali soil improver method and its product and application", which uses calcium sulfate in gypsum to replace exchangeable sodium in soil, but waste gypsum board needs to be processed and broken to Used to improve soil. If the particle size of the improver after crushing is large, it is not conducive to the ion exchange reaction, and the improvement effect is poor; if the particle size of the improver after crushing is small, it will consume a lot of energy, making the cost of soil improvement too high for farmers to bear. Patent CN201110124738.5 discloses "composition for improving saline-alkali soil with power plant waste, peat, and weathered coal resources" using a mixture of power plant waste such as desulfurized gypsum and fly ash and weathered coal resources as a modifier. The high content of heavy metals in soil will cause the heavy metals and harmful trace elements in the improved soil to exceed the allowable value of the national standard. Some patents, such as CN03111936.0, CN200910117619.X, etc., involve complex formulations of improver components.

Therefore, the current soil conditioner needs to be further studied.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the present invention is to propose a kind of soil improver with good universality of biological improvement, quick effect, low price, and low heavy metal content, which is suitable for the improvement of saline-alkali soil, especially for Improvement of moderately salinized soils.

According to one aspect of the present invention, the present invention provides a soil improvement conditioner. According to an embodiment of the present invention, the soil improvement conditioner includes: 55-60 parts by weight of calcium salt, 18-23 parts by weight of biomass coke, 10-15 parts by weight of biomass aqueous solution and 10-12 parts by weight of organic fertilizer.

According to the embodiments of the present invention, the soil improvement conditioner of the present invention can quickly and effectively improve various problems such as high degree of alkalization of the soil, low fertility, high soil pH value and soil agglomeration. Moreover, the price of the soil improving conditioner is low, the content of organic matter is high, and the content of heavy metals is low.

According to another aspect of the present invention, the present invention provides a method for preparing a soil improvement conditioner. According to an embodiment of the present invention, the method includes: mixing biomass organic matter and calcium salt to obtain a first mixture; and heat-treating the first mixture to obtain a heat-treated solid product and a heat-treated liquid product, wherein the The heat-treated solid product includes: biomass coke and the calcium salt; the heat-treated liquid product is subjected to static layering and the water phase is separated, and the water phase constitutes the biomass aqueous solution; organic fertilizer, performing a first stirring treatment to obtain a second mixture; and adding the biomass aqueous solution to the second mixture, performing a second stirring treatment, so as to obtain the soil improvement conditioner.

According to the embodiment of the present invention, using the method of the present invention, the calcium salt and the biomass organic matter are mixed and then heat-treated directly, without crushing and pretreatment of the biomass organic matter and calcium salt, which simplifies the production process and can also improve the coke. Moreover, the calcium salt is heated to release water, and after condensation and recovery, the yield of the heat-treated liquid product obtained by charging is also improved. At the same time, the method of the invention has simple production process and low production cost, and the prepared soil improvement conditioner has high organic content and low heavy metal content, and can quickly and effectively enhance soil fertility.

According to yet another aspect of the present invention, the present invention provides a method for improving moderately salinized soil. According to an embodiment of the present invention, the method applies the aforementioned soil improvement conditioner to the moderately salinized soil.

According to the embodiments of the present invention, moderate salinization soil can be improved quickly and effectively by using the soil improvement conditioner of the present invention. The soil improvement conditioner can effectively reduce the alkalinity of the soil, enhance the fertility of the soil, reduce the pH value, and improve the aggregate structure of the soil.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 shows a flow chart of preparing a soil improvement conditioner according to one embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Soil Improvement Conditioner

According to one aspect of the present invention, the present invention provides a soil improvement conditioner. According to an embodiment of the present invention, the soil improvement conditioner includes: 55-60 parts by weight of calcium salt, 18-23 parts by weight of biomass coke, 10-15 parts by weight of biomass aqueous solution and 10-12 parts by weight of organic fertilizer.

According to an embodiment of the present invention, the calcium ion (Ca ²⁺ ) in the calcium salt of the present invention can carry out ion exchange with the substitutable sodium ion on the soil colloid, so that the sodium ion enters the soil solution from the soil colloid and then goes under the irrigation water. Seepage or discharge through drainage channels, thereby reducing the alkalinity of the soil and improving the aggregate structure of the soil. According to an embodiment of the present invention, the biomass coke of the present invention is a porous carbon-rich polymer, which is slightly alkaline, can absorb and fix salt ions and water in the soil, maintain soil moisture, and provide a place for soil microorganisms to reproduce. At the same time, it blocks the capillary channel to a certain extent, reduces the salinity of soil particles, and improves the soil structure and the aggregation characteristics of saline-alkali soil particles. According to the embodiments of the present invention, the biomass aqueous solution contains a large amount of acetic acid, propionic acid, acetone, etc., which can increase the organic matter content of the soil, combine with organic bacterial fertilizer, increase soil fertility, provide nutrients for crop growth, and reduce the pH of alkaline soil value to improve the alkalization of the soil. Therefore, the soil improving conditioner of the present invention can improve various problems of the soil, and the soil improving agent can effectively reduce the alkalization degree of the soil, enhance the fertility of the soil, reduce the pH value of the soil, and improve the aggregate structure of the soil. Moreover, the soil improvement conditioner has low price, high organic matter content and low heavy metal content, and can quickly and effectively enhance soil fertility.

According to a specific embodiment of the present invention, biomass coke and biomass aqueous solution are obtained through the following steps: mixing biomass organic matter with calcium salt to obtain a first mixture; subjecting the first mixture to heat treatment to obtain a heat-treated solid product and The heat-treated liquid product, wherein the heat-treated solid product includes: biomass coke and calcium salt; the heat-treated liquid product is subjected to static layering and the water phase is separated, and the water phase constitutes an aqueous solution of biomass. The inventor surprisingly found that after mixing the calcium salt and the biomass organic matter, heat treatment is performed directly, and the heat treatment of the biomass organic matter generates small-volume coke, thereby omitting the process of crushing the biomass organic matter and simplifying the production process. It can also increase the yield of coke, and the calcium salt is heated to release water, and after condensation and recovery, the yield of the biomass aqueous solution obtained by charging is also improved.

Wherein, it should be noted that calcium salts will be dehydrated in the heat treatment process. In the present invention, calcium salts after dehydration and calcium salts without dehydration treatment can be used in the soil improvement conditioner of the present invention, which can improve the condition of soil. The composition of the agent has no effect, and it has no effect on the improvement effect of the soil.

According to a specific embodiment of the present invention, the biomass organic matter is at least one selected from sawdust, wood chips, and crop straw, wherein the crop straw can be agricultural waste such as corn straw, wheat straw, and rice straw. Thus, production waste such as sawdust, sawdust, and crop stalks can be used as raw materials for the soil improvement conditioner, and the production waste can be utilized, and the cost of the soil improvement conditioner is low.

According to some embodiments of the present invention, the calcium salt is desulfurized gypsum. Among them, it should be noted that desulfurization gypsum is a by-product of limestone-gypsum flue gas wet desulfurization process in coal-fired power plants, and the content of active ingredient CaSO4.2H ₂ O in desulfurization gypsum is 60-92%. Calcium ions (Ca ²⁺ ) in desulfurized gypsum can be exchanged with replaceable sodium ions on the soil colloid, so that the sodium ions enter the soil solution from the soil colloid and then infiltrate with irrigation water or drain away through drainage channels, reducing soil Alkalinity, and improve the aggregate structure of the soil.

According to some embodiments of the present invention, the weight ratio of biomass organic matter to calcium salt is not particularly limited, and the ratio can be adjusted according to the problem of the soil. For example, the alkalinization problem of the soil is serious, and the ratio of calcium salt can be increased. If the salinity is high and the soil lumps are serious, the ratio of biomass organic matter can be provided. Preferably, the weight ratio of biomass organic matter to calcium salt is 0.6-1.4:1. Therefore, the soil improvement conditioner prepared by mixing in this proportion can effectively reduce the degree of soil alkalization and improve the soil structure and the aggregation of soil particles.

According to a particular embodiment of the invention, the particle size of the calcium salt is at most 50 microns. Therefore, the contact area between the calcium salt and the soil is large, and the ion exchange reaction between the calcium ion and the replaceable sodium ion in the soil is promoted, and the improvement effect on the soil is good.

According to a specific embodiment of the present invention, the heat treatment is baking, dry distillation or pyrolysis. Thus, the coke obtained by the heat treatment and the heat treatment liquid product have a high yield, and the heat treatment effect is good.

According to a specific embodiment of the present invention, the heat treatment is carried out at a temperature of 280-500° C. under an inert atmosphere, wherein the inert atmosphere is flue gas or inert gas. Therefore, the product obtained by heat treatment is not easy to be oxidized, and the yield of coke and liquid product of heat treatment is high, and the effect of heat treatment is good.

According to a specific embodiment of the present invention, the pH value of the biomass aqueous solution is less than 7, which can directly reduce the pH value of the alkaline earth. Moreover, the biomass aqueous solution can also contain a large amount of acetic acid, propionic acid, acetone, etc., and the soil improvement conditioner has a high content of organic matter. Combined with organic bacterial fertilizer, it is beneficial to increase soil fertility and provide nutrients for crop growth.

According to some embodiments of the present invention, the organic fertilizer is a fertilizer fermented with probiotic flora, that is, a fertilizer obtained by adding probiotic flora to commercially available organic fertilizers for fermentation. Therefore, the organic fertilizer contains a large amount of fermentation products of probiotic flora, and the organic fertilizer has high fertility.

According to a specific embodiment of the present invention, the probiotic group is at least one selected from halophilic bacteria, lactic acid bacteria, acetic acid bacteria, yeast and photosynthetic bacteria. Therefore, the fermentation effect of the probiotic group is good, the organic fertilizer contains a large amount of beneficial fermentation products, and the organic fertilizer has high fertility.

Method for preparing soil improvement conditioner

According to another aspect of the present invention, the present invention provides a method for preparing a soil improvement conditioner. Referring to Fig. 1, the method for preparing the soil improvement conditioner is described in detail.

S100: Hybrid

According to an embodiment of the present invention, the biomass organic matter and the calcium salt are mixed to obtain the first mixture. Thus, the biomass organic matter and the calcium salt are evenly mixed, the pyrolysis reaction is promoted, and the yield of coke and biomass aqueous solution is improved.

According to a specific embodiment of the present invention, the biomass organic matter is at least one selected from sawdust, wood chips, and crop straw, wherein the crop straw can be agricultural waste such as corn straw, wheat straw, and rice straw. Thus, production waste such as sawdust, sawdust, and crop stalks can be used as raw materials for the soil improvement conditioner, and the produced waste can be utilized, and the cost of the soil improvement conditioner is low.

According to some embodiments of the present invention, the calcium salt is desulfurized gypsum. Among them, it should be noted that desulfurization gypsum is a by-product of limestone-gypsum flue gas wet desulfurization process in coal-fired power plants, and the content of active ingredient CaSO ₄ ·2H ₂ O in desulfurization gypsum is 60-92%. Calcium ions (Ca ²⁺ ) in desulfurized gypsum can be exchanged with replaceable sodium ions on the soil colloid, so that the sodium ions enter the soil solution from the soil colloid and then infiltrate with irrigation water or drain away through drainage channels, reducing soil Alkalinity, and improve the aggregate structure of the soil.

According to some embodiments of the present invention, the weight ratio of biomass organic matter to calcium salt is not particularly limited, and the ratio can be adjusted according to the problem of the soil. For example, the alkalinization problem of the soil is serious, and the ratio of calcium salt can be increased. If the salinity is high and the soil lumps are serious, the ratio of biomass organic matter can be provided. Preferably, the weight ratio of biomass organic matter to calcium salt is 0.6-1.4:1. Therefore, the soil improvement conditioner prepared by mixing in this proportion can effectively reduce the degree of soil alkalization and improve the soil structure and the aggregation of soil particles.

S200: heat treatment

The first mixture is heat-treated to obtain a heat-treated solid product and a heat-treated liquid product, wherein the heat-treated solid product includes: biomass coke and calcium salt. The inventors have surprisingly found that the first mixture is subjected to heat treatment, and the biomass organic matter generates small-volume coke, thereby omitting the process of crushing and pretreating the biomass organic matter and calcium salt, simplifying the production process, and improving the quality of the coke. Productivity, and, calcium salt heating releases water, after condensation recovery, the productive rate of the heat-treated liquid product that collects obtains has also improved.

Wherein, it should be noted that calcium salts will be dehydrated in the heat treatment process. In the present invention, calcium salts after dehydration and calcium salts without dehydration treatment can be used in the soil improvement conditioner of the present invention, which can improve the condition of soil. The composition of the agent has no effect, and it has no effect on the improvement effect of the soil.

According to a particular embodiment of the invention, the particle size of the calcium salt is at most 50 microns. Therefore, the contact area between the calcium salt and the soil is large, and the ion exchange reaction between the calcium ion and the replaceable sodium ion in the soil is promoted, and the improvement effect on the soil is good.

According to a specific embodiment of the present invention, the heat treatment is baking, dry distillation or pyrolysis. Thus, the yield of coke and biomass aqueous solution obtained by heat treatment is high, and the effect of heat treatment is good.

According to a specific embodiment of the present invention, the heat treatment is carried out at a temperature of 280-500° C. under an inert atmosphere, wherein the inert atmosphere is flue gas or inert gas. Therefore, the product obtained by heat treatment is not easy to be oxidized, and the yield of coke and biomass aqueous solution is high, and the effect of heat treatment is good.

S300: static layering

The heat-treated liquid product is allowed to stand for stratification and the water phase is separated, and the water phase constitutes an aqueous solution of biomass. Thus, the volatile products in the heat treatment process will form heat-treated liquid products after being condensed and recovered. This part of the heat-treated liquid products will form two layers after standing still, one is water-insoluble tar, and the other is tar containing a large amount of water-soluble organic matter. Water phase, this layer of water phase containing water-soluble organic matter constitutes the biomass aqueous solution. The biomass aqueous solution contains a large amount of acetic acid, propionic acid, acetone, etc., which can increase the organic matter content of the soil, combine with organic bacterial fertilizer, increase soil fertility, and provide nutrients for crop growth.

According to a specific embodiment of the present invention, the pH value of the biomass aqueous solution is less than 7 and is acidic, which can directly reduce the pH value of alkaline soil and improve the alkalization of the soil.

S400: first stirring treatment

The organic fertilizer is added to the heat-treated solid product, and the first stirring treatment is performed to obtain the second mixture. Therefore, the organic fertilizer contains a large amount of organic matter, and the fertility of the soil improvement conditioner can be increased by adding the organic fertilizer.

According to some embodiments of the present invention, the organic fertilizer is a fertilizer fermented by probiotic flora. Therefore, the organic fertilizer contains a large amount of fermentation products of probiotic flora, and the organic fertilizer has high fertility.

According to a specific embodiment of the present invention, the probiotic group is at least one selected from halophilic bacteria, lactic acid bacteria, acetic acid bacteria, yeast and photosynthetic bacteria. Therefore, the fermentation effect of the probiotic group is good, the organic fertilizer contains a large amount of beneficial fermentation products, and the organic fertilizer has high fertility.

According to an embodiment of the present invention, the weight ratio of the heat-treated solid product to the organic fertilizer is not particularly limited, and can be appropriately adjusted according to the soil to be improved. If the content of salt ions in the soil is high, the ratio of the heat-treated solid product can be increased. If If the fertility of the soil is poor, the proportion of the organic fertilizer can be increased. Preferably, the weight ratio of the heat-treated solid product to the organic fertilizer is 6-8:1. Therefore, the soil improvement conditioner prepared by mixing in this ratio can effectively reduce the salt content in the soil and enhance the fertility of the soil.

S500: Second stirring treatment

The biomass aqueous solution is added to the second mixture, and the second stirring treatment is performed to obtain a soil improvement conditioner. Since the addition amount of the biomass aqueous solution is small, after the first stirring, the biomass aqueous solution is added to the second mixture, so that the biomass aqueous solution and the second mixture can be mixed more uniformly.

According to a specific embodiment of the present invention, the weight ratio of the second mixture to the aqueous biomass solution is 7-9:1. Therefore, the soil improvement conditioner has a good improvement effect on the soil, can effectively reduce the alkalization degree of the soil, enhance the fertility of the soil, reduce the pH value of the soil, and improve the aggregate structure of the soil.

Methods of improving moderately salinized soil

According to yet another aspect of the present invention, the present invention provides a method for improving moderately salinized soil. According to an embodiment of the present invention, the method applies the aforementioned soil improvement conditioner to moderately salinized soil.

According to the embodiments of the present invention, moderate salinization soil can be improved quickly and effectively by using the soil improvement conditioner of the present invention. The soil improvement conditioner can effectively reduce the alkalinity of the soil, enhance the fertility of the soil, reduce the pH value, and improve the aggregate structure of the soil.

According to some embodiments of the present invention, the application rate of the soil improvement conditioner is 2500-3500 kg/mu. According to the embodiment of the present invention, if the application rate is lower than the application amount, the addition amount of the soil improvement conditioner is too small, and the calcium ion is insufficient to carry out the replacement reaction with the sodium ion in the soil colloid, and the pH value of the soil cannot be adjusted to a reasonable level. Moreover, the improvement effect on soil fertility is not obvious. If it is higher than the implementation amount, the addition amount of the soil improvement conditioner is too much, which may cause soil acidification, and the fertility of the soil is too high, which is not conducive to the growth of plants.

According to a specific embodiment of the present invention, the moderately salinized soil has a pH value of 9-10.5, a degree of alkalinity of 10-25%, and a salt content of <0.9%. Therefore, the soil improvement conditioner has a good improvement effect on the soil, can significantly improve the alkalization degree of the soil, enhance the fertility of the soil, reduce the pH value of the soil, and improve the aggregate structure of the soil.

The present invention will be described below with reference to specific embodiments. It should be noted that these embodiments are only illustrative and should not be construed as limiting the present invention.

Example 1

Utilize the method of the present invention, prepare a kind of improved conditioning agent, concrete steps are as follows:

(1) Stir and mix 65g of desulfurized gypsum and 50g of rice stalks, put them into a fixed reaction vessel, the front of the fixed reaction vessel is connected to a nitrogen tank, and the rear is connected to a sleeve condenser;

(2) Continuously feed a small amount of nitrogen into the fixed reaction vessel, heat the fixed reaction vessel to 400° C. and keep it for 1 hour, and the gas product is passed into the sleeve condenser to condense and recover the liquid product;

(3) After the reactor is cooled to room temperature, collect the solid product, and after simple crushing and crushing, stir and mix with 10g of organic fertilizer. The mixture of organic bacterial manure is stirred evenly to obtain an improved conditioning agent, and its ingredients are: 60 g of desulfurized gypsum, 20 g of biomass coke, 10 g of biomass aqueous solution and 10 g of organic bacterial manure.

Utilize above-mentioned improved conditioner to treat soil, the soil to be improved has pH=9, alkalization degree 15%, salt content 0.5%, and the application rate of improved conditioner is 2700kg/mu. After the improvement, the pH of the soil is reduced to about 7.5, and the degree of alkalization is reduced to below 5%. One application can continue to be effective for many years, and there is no need for repeated application for improvement within 5-8 years.

Example 2

Utilize the method of the present invention, prepare a kind of improved conditioning agent, concrete steps are as follows:

(1) Stir and mix 60g of desulfurized gypsum and 70g of sawdust, put them into a fixed reaction vessel, the front of the fixed reaction vessel is connected to a nitrogen tank, and the rear is connected to a sleeve condenser;

(2) Continuously feed a small amount of nitrogen into the fixed reaction vessel, heat the fixed reaction vessel to 500° C. and keep it for 1 hour, and the gas product is passed into the sleeve condenser to condense and recover the liquid product;

(3) After the reactor is cooled to room temperature, collect the solid product and mix it with 12g of organic fertilizer. After the liquid product is allowed to stand and separate, filter to obtain the water phase product, and spray 10g of it into the mixture of the solid product and the organic fertilizer. and stir evenly to obtain an improved conditioner, the ingredients of which are: 55g of desulfurized gypsum, 23g of biomass coke, 10g of biomass aqueous solution and 12g of organic bacterial fertilizer.

Utilize the above-mentioned improved conditioner to treat the soil, the pH of the soil to be improved is 10, the degree of alkalization is 20%, the salt content is 0.7%, and the application rate of the improved conditioner is 3200kg/mu. After the improvement, the pH of the soil is reduced to about 7.5, and the degree of alkalization is reduced to below 5%. One application can continue to be effective for many years, and there is no need for repeated application for improvement within 5-8 years.

Example 3

Utilize the method of the present invention, prepare a kind of improved conditioning agent, concrete steps are as follows:

(1) Stir and mix 62g of desulfurized gypsum and 55g of sawdust, put them into a fixed reaction vessel, the front of the fixed reaction vessel is connected to a nitrogen tank, and the rear is connected to a sleeve condenser;

(2) Continuously feed a small amount of nitrogen into the fixed reaction vessel, heat the fixed reaction vessel to 500° C. and keep it for 1 hour, and the gas product is passed into the sleeve condenser to condense and recover the liquid product;

(3) After the reactor is cooled to room temperature, collect the solid product and mix it with 11g of organic fertilizer. After the liquid product is allowed to stand and separate, filter to obtain the water phase product, and spray 15g into the mixture of the solid product and the organic fertilizer. and stir evenly to obtain an improved conditioner, the composition of which is: 58g of desulfurized gypsum, 18g of biomass coke, 15g of biomass aqueous solution and 11g of organic bacterial fertilizer.

Utilize the above-mentioned improved conditioner to treat the soil, the pH of the soil to be improved is 10, the degree of alkalization is 20%, the salt content is 0.7%, and the application rate of the improved conditioner is 3200kg/mu. After the improvement, the pH of the soil is reduced to about 7.5, and the degree of alkalization is reduced to below 5%. One application can continue to be effective for many years, and there is no need for repeated application for improvement within 5-8 years.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (8)

1. A soil improvement conditioner, characterized in that, consists of the following components: 55-60 parts by weight of heat-treated desulfurized gypsum, 18-23 parts by weight of biomass coke, 10-15 parts by weight of biomass aqueous solution and 10-12 parts by weight of organic fertilizer; Described soil improvement conditioner obtains through the following steps: Mix biomass organic matter and desulfurized gypsum at a weight ratio of 0.6-1.4:1 to obtain a first mixture; heat-treat the first mixture to obtain a heat-treated solid product and a heat-treated liquid product, wherein the heat-treated solid The product includes: the biomass coke and the heat-treated desulfurized gypsum; the heat-treated liquid product is obtained by condensing and recovering the gas generated in the heat treatment process, which is allowed to stand for stratification and separate the water phase, and the water phase constitutes The biomass aqueous solution; adding organic fertilizers to the heat-treated solid product, performing a first stirring treatment, so as to obtain a second mixture; adding the biomass aqueous solution to the second mixture, performing a second stirring treatment, so that Obtain the soil improvement conditioner; Wherein, the biomass organic matter is at least one selected from sawdust and crop straw, The particle size of the desulfurized gypsum is at most 50 microns, The heat treatment is baking, dry distillation or pyrolysis, The heat treatment is carried out at a temperature of 280-500°C under an inert atmosphere, The pH value of the biomass aqueous solution is less than 7. 2. soil improvement conditioner according to claim 1, is characterized in that, described organic chemical fertilizer is the fermented chemical fertilizer of probiotic flora, Optionally, the probiotic group is at least one selected from the group consisting of halophilic bacteria, lactic acid bacteria, acetic acid bacteria, yeast and photosynthetic bacteria. 3. A method for preparing the soil improvement conditioner described in any one of claims 1-2, characterized in that, comprising: Mixing biomass organic matter with desulfurized gypsum to obtain a first mixture; heat-treating the first mixture to obtain a heat-treated solid product and a heat-treated liquid product, wherein the heat-treated solid product includes: biomass coke and the Desulfurized gypsum after heat treatment; the heat-treated liquid product is obtained by condensing and recovering the gas generated during the heat treatment process, which is allowed to stand for stratification and separate the water phase, and the water phase constitutes the biomass aqueous solution; adding organic fertilizers to the heat-treated solid product, performing a first stirring treatment, so as to obtain a second mixture; and adding the biomass aqueous solution to the second mixture, performing a second stirring treatment, so as to obtain the soil improvement conditioner. 4. The method according to claim 3, characterized in that, the biomass organic matter is at least one selected from sawdust and crop stalks, Optionally, the particle size of the desulfurized gypsum is at most 50 microns, Optionally, the weight ratio of the biomass organic matter to the desulfurized gypsum is 0.6-1.4:1, Optionally, the heat treatment is baking, dry distillation or pyrolysis, Optionally, the heat treatment is carried out at a temperature of 280-500° C. under an inert atmosphere. 5. method according to claim 3, is characterized in that, described organic chemical fertilizer is the fermented chemical fertilizer of probiotic flora, Optionally, the probiotic group is at least one selected from the group consisting of halophilic bacteria, lactic acid bacteria, acetic acid bacteria, yeast and photosynthetic bacteria. 6. method according to claim 3, is characterized in that, described biomass aqueous solution pH value is less than 7, Optionally, the weight ratio of the second mixture to the aqueous biomass solution is 7-9:1. 7. A method for improving moderately salinized soil, characterized in that the soil improvement conditioner according to any one of claims 1-2 is applied to the moderately salinized soil. 8. The method according to claim 7, characterized in that, the application rate of the soil improvement conditioner is 2500-3500kg/mu, Optionally, the moderately salinized soil has a pH value of 9-10.5, a degree of alkalinity of 10-25%, and a salt content of <0.9%.