CN111410589A - Soil conditioner and preparation method and application thereof - Google Patents

Soil conditioner and preparation method and application thereof Download PDF

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Publication number
CN111410589A
CN111410589A CN202010142306.6A CN202010142306A CN111410589A CN 111410589 A CN111410589 A CN 111410589A CN 202010142306 A CN202010142306 A CN 202010142306A CN 111410589 A CN111410589 A CN 111410589A
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soil
chitin
glucose
parts
cow dung
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柏彦超
王耀
汤泽辉
吕铭
沈志荣
左文刚
单玉华
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Yangzhou University
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Yangzhou University
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B79/00—Methods for working soil
    • A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F1/00—Fertilisers made from animal corpses, or parts thereof
    • C05F1/005—Fertilisers made from animal corpses, or parts thereof from meat-wastes or from other wastes of animal origin, e.g. skins, hair, hoofs, feathers, blood

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention discloses a soil conditioner which is prepared from the following components in parts by weight: 85-95 parts of cow dung compost, 3-9 parts of chitin and 2-6 parts of glucose. The invention also discloses a preparation method and application of the soil conditioner. The soil conditioner provided by the invention increases the soil organic matters of the saline-alkali soil, promotes the rapid formation of mud flat soil aggregates, cuts off capillary pores, further inhibits the soil salt return, promotes the reduction of the surface soil salt return, and reduces the exchangeable Na+Plays the role of a dispersing agent; in addition, the pH value of the soil is reduced, the content of organic matters and nutrients such as N, P is increased, the growth of plants is promoted, the biomass of the plants is improved, and the like.

Description

Soil conditioner and preparation method and application thereof
Technical Field
The invention belongs to the field of soil remediation, and relates to a soil conditioner, a preparation method and application thereof, in particular to a coastal beach saline-alkali soil conditioner, a preparation method and an application method thereof, and particularly relates to a soil conditioner which is suitable for coastal beach saline-alkali soil in China and promotes the formation of soil aggregates, and a preparation method and application thereof.
Background
The east coastal mudflat of China is an important reserve cultivated land resource. The newly reclaimed beach soil belongs to saline-alkali soil, and the most key measures in the improvement process are as follows: firstly, salt is reduced; and secondly, organic matters are added to improve the soil fertility. One key point in the rapid increase in fertility of desalination processes that can be accelerated by induced thinning and by means of concentrated rainfall is the promotion of the formation of good structures (mainly aggregates) of the surface soil. Researches show that the salt content of the soil is negatively related to the content of organic matters, and the main reasons are that organic colloid in the organic matters of the soil can improve the aggregation of soil particles, promote the formation of aggregates, improve the porosity of non-capillary tubes, increase channels for leaching salt downwards, cut off the capillary tubes, block the channels for rising water and salt and inhibit salt return. In addition, the organic colloid has a large amount of negative charges, the cation exchange capacity and the water absorption rate of the organic colloid are several times or even dozens of times larger than those of soil clay grains, and the organic colloid and the soil clay grains are combined to form aggregates, so that the soil fertility preservation capability can be greatly improved. Soil organic matter is an important material base for promoting aggregate formation and stabilization. However, the newly reclaimed coastal soil has low organic matter content, and the process of forming a large number of aggregates by accumulating organic matters on the coastal tidal flat is very slow under the special soil environmental conditions of high salt and high pH of the coastal tidal flat. Therefore, on the basis of the salt reduction measure, a large amount of exogenous organic materials are artificially input, the formation and the stability of aggregates are promoted, and the precondition that the salt return is inhibited, the fertility is improved, and the conversion of the beach soil to the agricultural soil is promoted is provided.
Formation and stabilization of soil aggregates is associated with "binders" and/or "dispersants". Soil organic carbon is generally considered to be an important "binder" that improves soil aggregate formation and stability. High salt content (especially exchangeable Na) of mudflat soil+) Are recognized as "dispersants" that disrupt agglomerate formation and stability. Research shows that the application of the domestic sludge can obviously increase organic carbon of mud flat soil and reduce surface soilThe salt content of the soil (including exchangeable Na)+) And obviously promotes the formation of water-stable aggregates with the surface soil being more than 0.25 mm. The reasons for this may be: on the premise of salt reduction measures, the soil has exchangeable Na+The content is reduced, which is not enough to disperse the aggregates formed by the exogenous organic carbon to play the role of a bonding agent, thereby inhibiting the salt return. Therefore, the addition of exogenous organic matters increases the 'combination' effect of organic carbon in soil, and can 'offset' exchangeable Na to a certain extent+The dispersion function of the soil stabilizer promotes the formation and the stability of the soil aggregate of the beach.
Soil aggregates are closely related to microorganisms, the former being the site where the latter is present, and the latter being a major factor in the formation of the former. After different exogenous organic matters enter soil, intermediate products generated by microbial decomposition are different, and the influences on microbial community structure, aggregate formation and stability are different. Soil organic molecules can be directly combined with soil mineral particles to form organic-inorganic complexes, which is an important basis for aggregate formation and stabilization.
The technical bottleneck that soil aggregate is difficult to form in the beach saline-alkali land is as follows: (1) soil organic matter is the material basis for aggregate formation; the organic matter content of the soil of the beach saline-alkali soil is very low, and the process of accumulating a large amount of organic matters by depending on the soil is very slow under the conditions of high salt and high pH of the soil of the beach saline-alkali soil. (2) Soil microorganisms are an important driving force for aggregate formation and stabilization; under the conditions of high salt and high pH of the soil of the beach saline-alkali soil, the number of microorganisms is small, and the area system is single. (3) High salt content (especially exchangeable Na) of soil of beach saline-alkali land+) Are recognized as "dispersants" that disrupt agglomerate formation and stability.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a soil conditioner.
The invention also aims to solve the technical problem of providing a preparation method of the soil conditioner.
The invention finally solves the technical problem of providing the application of the soil conditioner.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the invention provides a soil conditioner which is prepared from the following components in parts by weight: 85-95 parts of cow dung compost, 3-9 parts of chitin and 2-6 parts of glucose.
Preferably, the cow dung compost comprises 90-95 parts, chitin 3-6 parts and glucose 2-4 parts.
Wherein the organic matter content of the cow dung compost is more than or equal to 25 wt%, and the water content is less than or equal to 70 wt%.
Wherein the chitin is a granular powder, and is a powder prepared by crushing shells of oyster, freshwater mussel, clam and/or snail after fleshing.
Wherein the glucose is a particulate powder, C6H12O6The content is more than or equal to 95 percent.
The invention also comprises a preparation method of the soil conditioner, which comprises the following steps: uniformly mixing the cow dung compost and the chitin by adopting a stirrer to obtain a mixture, dissolving glucose in water, uniformly spraying the glucose in the mixture of the cow dung compost and the chitin, and uniformly stirring.
Wherein the addition amount of the chitin is 3-10.6% of the mass of the cow dung compost.
Wherein the total addition amount of the glucose is 2-6.8% of the mass of the mixture of the cow dung compost and the chitin.
Wherein the mass ratio of the glucose to the water is 1/10-1/20.
The invention also comprises the application of the soil conditioner in the formation of soil aggregates in the beach saline-alkali soil.
Wherein, the application comprises: in a mild saline-alkali soil with the salt content of less than 4g/kg, the using amount of 1-4 tons/mu is directly broadcast as a base fertilizer, and the base fertilizer is uniformly mixed with 0-20cm of soil by using a rotary cultivator.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) composting cow dung: a large amount of exogenous organic matters are provided, and the exogenous organic matters are an important matter basis for promoting the formation of soil aggregates; in addition, the cow dung compost can adjust the pH value of soil, increase the content of nutrients such as soil organic matters and N, P and provide nutrients for plant growth.
(2) Glucose: a large amount of carbon sources are provided for the life activities of the microorganisms, the mass propagation of the microorganisms is promoted, and the rapid formation of the aggregates can be driven in a short period (within 3 months);
(3) chitin: can be rapidly combined with soil minerals of the mud flat to form an organic-inorganic complex, and can drive the formation and the stability of the aggregate for a long time (9 months).
(4) The mudflat soil aggregate can be promoted to be rapidly formed in a short period by the optimized proportioning and application of the materials, the chitin can keep the long-term stability of the formed aggregate, the organic matter of the mudflat soil is increased by the cow dung compost, the formation and the stability of the soil aggregate are further promoted, the materials are synergistic, and the rapid formation and the stability of the mudflat soil aggregate can be realized, so that capillary pores are cut off, the soil back salt is further inhibited, the reduction of the surface soil back salt is promoted, and the function of exchangeable Na + to play a role of a dispersant is reduced; in addition, the pH value of the soil is reduced, the content of organic matters and nutrients such as N, P is increased, the growth of plants is promoted, the biomass of the plants is improved, and the like.
Drawings
FIG. 1: the influence of different organic matters (glucose, chitin, chitosan and microcrystalline cellulose) on beach soil aggregate in different time (3, 6 and 9 months).
FIG. 2: 6 months (A) and 12 months (B) after the conditioner with different formulas is applied to the formation of aggregates with the diameter of more than 0.25mm on the surface soil of the beach saline-alkali land.
FIG. 3: the influence of different application amounts of the modifying agent on the formation of aggregates with the thickness of more than 0.25mm on the surface soil of the beach saline-alkali land.
FIG. 4: the influence of different application amounts of the modifying agent on the soil EC (A) and pH (B) of the beach saline-alkali soil.
FIG. 5: the influence of different application amounts of the modifying agent on the contents of total nitrogen (A) and total phosphorus (B) in the soil of the beach saline-alkali soil.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
A soil conditioner comprises the following components in parts by mass: 95 parts of cow dung compost, 3 parts of chitin and 2 parts of glucose. Wherein, the organic matter content (dry basis) of the cow dung compost is not less than 25wt.%, and the water content is not more than 70 wt.%. Chitin was purchased from Shanghai blue season science development Co., Ltd. Glucose, granular powder, C6H12O6The content is more than or equal to 95 percent. Uniformly mixing the cow dung compost and the chitin by adopting a stirrer, dissolving the mixture in 1/20 mass percent of glucose/water, uniformly spraying the mixture in a cow dung compost and chitin system, and uniformly stirring.
Example 2
A soil conditioner comprises the following components in parts by mass: 90 parts of cow dung compost, 6 parts of chitin and 4 parts of glucose. The concrete preparation method of the soil conditioner is the same as that of example 1.
Example 3
A soil conditioner comprises the following components in parts by mass: 85 parts of cow dung compost, 9 parts of chitin and 6 parts of glucose. The concrete preparation method of the soil conditioner is the same as that of example 1.
Experimental example 1:
a pot culture test is adopted to research the influence of different carbon application amounts (0, 0.5%, 1.0%, 1.5% and 2.0%) of different organic materials (glucose, chitin, chitosan and microcrystalline cellulose) under the condition of equal carbon amount on the formation and stability of soil aggregates on the surface layer (0-20cm) of the coastal beach saline-alkali land, and each treatment is repeated for 3 times. The culture is carried out in a room for 9 months, water is added in a simulated dry-wet alternative mode during the culture period, and the water-soil ratio is 1: 5. Soil samples are taken once every 3 months of culture, the sampling dates are respectively 8 months and 17 days (3 months) in 2017, 11 months and 17 days (6 months) in 2017 and 2 months and 17 days (9 months) in 2018, and soil aggregates are measured by a wet screening method.
The measurement results of the soil aggregate of the beach saline-alkali soil treated by different organic materials (glucose, chitin, chitosan and microcrystalline cellulose) and different carbon contents (0, 0.5%, 1.0%, 1.5% and 2.0%) are shown in figure 1.
(1) Effect of glucose application on formation of mudflat soil aggregates
The formation of aggregates with the soil thickness of more than 0.25mm in the beach saline-alkali soil can be rapidly promoted by applying the glucose for 3 months. After the beach soil without applying exogenous organic matters is cultured for 3 months, 6 months and 9 months, the mass ratio of aggregates with the diameter larger than 0.25mm in the soil is 3.31 percent, 2.85 percent and 1.86 percent respectively. After 3 months of culture, the mass ratio of the aggregates > 0.25mm treated with glucose (1.0%, 1.5%, 2.0%) was 5.97%, 45.19%, 46.16%, respectively, all significantly higher than the control. After 6 months of culture, the number of aggregates > 0.25mm in the soil treated with glucose (1.5%, 2.0%) was significantly higher than the control, 35.97%, 37.91%, respectively. After 9 months of culture, the soil treated with glucose (1.5%, 2.0%) had > 0.25mm aggregates significantly higher than the control, 37.69%, 20.59%, respectively. The number of aggregates formed by glucose tended to decrease with the delay of the incubation time. This indicates that the aggregates formed by glucose are unstable and the effect of glucose in promoting the formation of aggregates is relatively short.
(2) Effect of chitin application on formation of mud flat soil aggregates
The chitin is used for 3 months, and the formation of aggregates with the soil thickness of more than 0.25mm in the beach saline-alkali soil can be rapidly promoted. After 3 months of culture, the mass ratios of the soil treated by chitin (1.0%, 1.5% and 2.0%) to the aggregate with the diameter of more than 0.25mm are respectively 23.98%, 29.05% and 49.11%, which are all significantly higher than the control. After 6 months of culture, the mass ratios of the soil treated with chitin (1.0%, 1.5%, 2.0%) to the aggregate of > 0.25mm were 39.06%, 34.30%, 46.92%, respectively. After nine months of culture, the mass ratios of the soil treated by chitin (1.0%, 1.5%, 2.0%) to the aggregate with the diameter of more than 0.25mm are 35.01%, 33.26% and 41.56%, respectively. The number of aggregates formed by chitin did not decrease with the delay of the incubation time. This shows that the aggregate formed by chitin is more stable and has lasting effect.
(3) Influence of application of chitosan and microcrystalline cellulose on formation of mud flat soil aggregates
According to the research conditions, the formation of soil aggregates on the mudflat can be increased to a certain extent by applying chitosan and microcrystalline cellulose, but the effect of the soil aggregates is much lower than that of glucose and chitin.
(4) Conclusion of the study
Under the condition of equal carbon content, the formation of mud flat soil aggregates can be remarkably promoted by applying glucose and chitin. In 3 rd month after the treatment of 1.5 percent of glucose carbon, the mudflat soil aggregate is obviously higher than the control; thereafter, the number of aggregates showed a decreasing trend as the incubation time progressed. The mudflat soil aggregate is obviously higher than the control in the 3 rd month after the chitin carbon dosage reaches 1.0 percent; the number of aggregates thereafter shows an increasing trend as the incubation time advances. The reason for this is that glucose provides a large amount of quick-acting carbon source, and the number and activity of soil microorganisms are improved, so that soil aggregates are driven to be rapidly formed; however, with the consumption of the glucose carbon source, the number and the activity of microorganisms are reduced, so that the number of aggregates in the soil of the beach is reduced. The chitin can be combined with soil minerals of the mud flat to form an inorganic complex, so that soil aggregate is driven to be rapidly formed and stabilized.
Experimental example 2
The salt content of the surface soil of the coastal beach saline-alkali land is 3.92g/kg, and the pH value of the soil is 8.95 respectively. Test site: the reclamation area of the Boehringer province, such as Dongshi; test time: 3 months in 2017-3 months in 2018. The test plots were reclaimed in 2000 years without any artificial reclamation measures.
A field random block test is adopted, the area of each cell is 4.0m × 4.0.0 m, 5 treatments are set according to different soil conditioner formulas in the test, namely CK, S1, S2, S3 and S4 are respectively repeated for 3 times, the conditioner is applied to each cell according to 3 tons/mu in 3 months in 2017, sludge is uniformly mixed with plough layer soil of 0-20cm by using a rotary cultivator, soil samples are respectively collected in 9 months (6 months) in 2017 and 3 months (12 months) in 2018, and determination and analysis are carried out.
Wherein, CK: blank, no modifier is applied, and other measures are completely consistent;
f1: 100 parts of cow dung compost; 0 part of chitin; and 0 part of glucose.
F2: 95 parts of cow dung compost; 3 parts of chitin; and 2 parts of glucose. (soil conditioner prepared in example 1)
F3: 90 parts of cow dung compost; 6 parts of chitin; and 4 parts of glucose. (soil conditioner prepared in example 2)
F4: 85 parts of cow dung compost; 9 parts of chitin; and 6 parts of glucose. (soil conditioner prepared in example 3)
The influence of different formula modifiers (CK, F1, F2, F3 and F4) on aggregate formation of more than 0.25mm of soil on the surface layer (0-20cm) of the beach saline-alkali land 6 months and 12 months after application is shown in figures 2-A, B.
(1) Influence of different formula modifiers on aggregate formation of soil of greater than 0.25mm in beach saline-alkali soil
The test period is 6 months and 12 months, and the soil of the saline-alkali soil without the modifier is larger than 0.25mm aggregates, which are only 3.72 percent and 3.98 percent. The aggregates of the saline-alkali soil with the soil thickness of more than 0.25mm after 6 treatments (F1, F2, F3 and F4) with different modifiers are all obviously higher than those of a control, and respectively reach 17.00%, 28.45%, 28.95% and 25.50%, and are respectively increased by 3.6, 6.6, 6.8 and 5.9 times compared with the control. The aggregate of more than 0.25mm of the saline-alkali soil after being treated by different modifying agents for 12 months is obviously higher than that of a control, and is respectively increased by 3.7 times, 8.5 times, 7.6 times and 5.9 times compared with the control.
(2) Conclusion of the study
In the formula of each modifying agent, the effect of promoting the formation of aggregates with the soil thickness of more than 0.25mm on the surface layer (0-20cm) of the beach saline-alkali land by treating with F2 and F3 is the best, and is obviously higher than that of other treatments. Therefore, the special improver for promoting the formation of soil aggregates in the beach saline-alkali land is suitable for F2 and F3 formulas, and comprises the following main components in parts by mass: 90-95 parts of cow dung compost, 3-6 parts of chitin and 2-4 parts of glucose.
Experimental example 3
The test land is located in south China city of Jiangsu province such as Dongxian county, is a typical coastal plain, and has flat terrain. Belongs to subtropical marine monsoon climate areas, is influenced by the circulation of the sea and monsoon, has abundant rainfall and sufficient illumination, and has the annual average temperature of 14.6 ℃. The salt content of the mud flat soil is 2.85g/kg, the pH value is 8.28, the organic matter is 3.84g/kg, the total nitrogen is 0.25g/kg, the alkaline hydrolysis nitrogen is 12.59mg/kg, the total phosphorus is 0.54g/kg, and the quick-acting phosphorus is 9.69 mg/kg.
The test adopts field random block groups, and the cell specification is 4 × 4m2The soil improvement agent prepared in example 1 (in which 95 parts of cow dung compost, 3 parts of chitin and 2 parts of glucose are added) at different dosages (0, 1, 2, 3 and 4 tons/mu), and the treatment is repeated 3 times for 15 cells. The soil conditioner prepared in the example 1 is applied to each cell in 2018 and 2 months, and the soil conditioner is fully and uniformly mixed with a soil layer of 0-20cm by adopting a rotary cultivator. No other fertilizers were added and agronomic measures were carried out during the test. And soil is collected in 2018 and 9 months for analysis and determination.
The influence of different application amounts of the modifying agent on the aggregate formation of the surface soil of the beach saline-alkali soil, which is more than 0.25mm, is shown in figure 3; the influence on the EC and pH of the soil of the beach saline-alkali soil is shown in figure 4; the influence on the total nitrogen and total phosphorus content of the soil of the beach saline-alkali soil is shown in figure 5.
(1) Influence of applying modifier on aggregate formation of soil of more than 0.25mm in beach saline-alkali soil
The number of aggregates > 0.25mm in beach soil without the application of the conditioner is only 3.51%. The number of the aggregates which are larger than 0.25mm in the beach soil after the conditioner is applied (1, 2, 3 and 4 tons/mu) is obviously higher than that of the control, and the aggregates are respectively increased by 2.5, 3.1, 3.9 and 5.0 times compared with the control.
(2) Influence of applying modifier on soil EC (A) and pH (B) of beach saline-alkali soil
The EC and pH of the beach soil without the modifier are the highest and respectively reach 382.3 mu m/cm and 8.91. The EC and pH of the beach soil treated by the applied modifying agent (1, 2, 3 and 4 tons/mu) are obviously lower than those of the control, wherein the EC of the soil is respectively reduced by 28.8 percent, 42.3 percent, 45.3 percent and 52.7 percent compared with the control, and the pH of the soil is respectively reduced by 0.32, 0.38, 0.63 and 1.13 pH units compared with the control.
(3) Influence of applied modifying agent on total nitrogen (A) and total phosphorus (B) content of soil of beach saline-alkali soil
The total nitrogen and total phosphorus contents of the beach soil without the application of the modifying agent are respectively 0.427g/kg and 0.810 g/kg. The total nitrogen and total phosphorus contents of the beach soil treated by the conditioner (1, 2, 3 and 4 tons/mu) are higher than those of the control, wherein the total nitrogen content of the soil is respectively increased by 18.0%, 129.0%, 193.0% and 311.0% compared with the control, and the total phosphorus content of the soil is respectively increased by 62.7%, 71.2%, 232.2% and 291.7% compared with the control.
(4) Conclusion of the study
The soil conditioner prepared in the embodiment 1 comprises 95 parts of cow dung compost, 3 parts of chitin and 2 parts of glucose, can remarkably promote the formation and the stability of aggregates with the size of more than 0.25mm in the soil of the beach saline-alkali land, and reduces the EC of the beach soil. The application of 3 tons of the improver per mu can play roles in promoting the rapid formation of soil aggregates on the mudflat, cutting off capillary pores, further inhibiting the soil salt return, promoting the reduction of the surface soil salt return and reducing the exchangeable Na+To act as a "dispersant".

Claims (10)

1. The soil conditioner is characterized by comprising the following components in parts by weight: 85-95 parts of cow dung compost, 3-9 parts of chitin and 2-6 parts of glucose.
2. A soil amendment according to claim 1, characterized in that the organic matter content of the cow dung compost is not less than 25wt.%, and the water content is not more than 70 wt.%.
3. The soil conditioner according to claim 1, wherein said chitin is a granular powder obtained by crushing a shell of oyster, mussel, clam and/or snail which has been fleshed.
4. A soil amendment according to claim 1, wherein the glucose is a particulate powder, C6H12O6The content is more than or equal to 95 percent.
5. A method of producing a soil amendment according to any one of claims 1 to 4, comprising the steps of: uniformly mixing the cow dung compost and the chitin by adopting a stirrer to obtain a mixture, dissolving glucose in water, uniformly spraying the glucose in the mixture of the cow dung compost and the chitin, and uniformly stirring.
6. A method for preparing a soil conditioner as claimed in claim 5, wherein the amount of said chitin added is 3% -10.6% of the mass of the cow dung compost.
7. A method for preparing a soil conditioner as claimed in claim 5, characterized in that the total addition amount of said glucose is 2% -6.8% of the mass of the mixture of cow dung compost and chitin.
8. A method for preparing a soil conditioner according to claim 5, characterized in that the mass ratio of glucose to water is 1/10-1/20.
9. The use of the soil conditioner of any one of claims 1 to 4 in the formation of soil aggregates in beach saline-alkali land.
10. The application according to claim 9, wherein the application comprises: in a mild saline-alkali soil with the salt content of less than 4g/kg, the using amount of 1-4 tons/mu is directly broadcast as a base fertilizer, and the base fertilizer is uniformly mixed with 0-20cm of soil by using a rotary cultivator.
CN202010142306.6A 2020-03-03 2020-03-03 Soil conditioner and preparation method and application thereof Withdrawn CN111410589A (en)

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