CN105967942B - Straw liquefied liquid for improving soil and preparation and soil improvement method - Google Patents
Straw liquefied liquid for improving soil and preparation and soil improvement method Download PDFInfo
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- CN105967942B CN105967942B CN201610289311.3A CN201610289311A CN105967942B CN 105967942 B CN105967942 B CN 105967942B CN 201610289311 A CN201610289311 A CN 201610289311A CN 105967942 B CN105967942 B CN 105967942B
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a straw liquefied liquid for improving soil and a preparation method and a soil improvement method thereof. The method of the invention does not use any catalyst, only adopts water as a medium to liquefy the straws, has double functions of improving the pH value of the soil and supplementing nutrition, and after the method is applied, the pH value of the soil is balanced, and organic matter nutrients such as nitrogen, phosphorus, potassium and the like are supplied, thereby promoting the growth of crops and improving the yield. The straw liquefying method is simple and has wide application range, the use amount of chemical fertilizer can be greatly reduced, the straw burning is reduced, and the environmental pollution caused by burning the straw is reduced. The straw liquefaction can kill the harmful germs left in the straw, and the harm of the straw carrying the harmful germs to the subsequent cultivation is reduced.
Description
Technical Field
The invention relates to a liquefied liquid agent for soil improvement and an improvement method, in particular to a straw liquefied liquid for soil improvement and a method for preparing the liquefied liquid and improving soil.
Background
The crop straws are produced by 1000-2000 million tons every year around the world, and the crop straws are produced by more than 7 million tons every year in China. At present, the straws are mainly applied to fertilizers, feeds, energy sources, industrial raw materials and deep processing. However, the straw is light in weight and large in size, so that the transportation cost is high and the development technology is limited, and the problem of large-scale utilization of the straw is still more. Because the enthusiasm of farmers is low in economic benefit level, a large amount of straws are incinerated, the economic performance of the straws is reduced, the environment is polluted, and fire disasters are caused by locally incinerating the straws.
The existing soil conditioner or soil fertilizer takes agricultural soil as a research object, or aims at improving soil degradation (desertification, alkalization and the like), and few soil conditioners which can increase soil fertility, improve crop yield and are suitable for improving saline-alkali soil are available.
The existing straw fertilizer preparation mainly comprises two methods of fermentation and biochar fertilizer preparation. The fermentation method consumes longer time; the method for preparing the fertilizer by the biochar not only loses a large amount of organic matters in the straws and reduces the utilization rate of the straws, but also is limited to use in the salinized soil because the biochar is alkaline. Therefore, the development of a soil conditioner which has the dual functions of soil pH value improvement and nutrition supplement, can balance the pH value of soil after application, can supply nutrient nutrients such as nitrogen, phosphorus, potassium and organic matters which are lacked in the soil, promotes the growth of crops, improves the yield and realizes the high-utilization-rate fast returning of straws to the field is urgently needed.
CN105418316A discloses a biochar fertilizer modifier suitable for salinized soil, a preparation method and an application method thereof, wherein the high-temperature anoxic cracking temperature is 300-500 ℃, and the time is 3-5 h.
The pyrolysis temperature in the preparation of the environment-friendly biomass soil conditioner disclosed in CN105367343A is 400-500 ℃ and the time is 2-3 h.
Disclosure of Invention
The invention aims to provide a straw liquefied liquid for improving soil without using any catalyst aiming at the defects of the prior art;
another object of the present invention is to provide a method for preparing a straw liquefied liquid for improving soil without using any catalyst;
the invention also aims to provide the straw liquefied liquid for improving the soil and a method for improving the soil.
The idea of the invention is that: the yield of the straw is high in China, the utilization rate is low, and a large amount of straw is burnt to cause environmental pollution. The crop wastes such as straws and the like contain abundant N, P, K and organic matters, and how to return the crop wastes to the field quickly and make the best use of the crop wastes is called the starting point of the research. In order to avoid secondary pollution, the invention does not use any catalyst, and only adopts water as a medium to liquefy the straws. The obtained product has the humic acid component which is very close to that of a product of natural decomposition of the straws, has double functions of improving the pH value of the soil and supplementing nutrition, can balance the pH value of the soil after being applied, can supply nutrient nutrients of nitrogen, phosphorus, potassium and organic matters which are lacked in the soil, promotes the growth of crops, improves the yield and realizes the high utilization rate of the straws to be returned to the field quickly. The straw liquefied liquid can increase soil fertility and crop yield, and is also suitable for improving saline-alkali soil.
The purpose of the invention is realized by the following technical scheme:
a straw liquefaction liquid for improving soil is prepared by taking crop straws as a main raw material, keeping the mass ratio of the straws to water at 200-320 ℃ and 10-15 MPa for 0.1-2 h to liquefy the straws without using any catalyst, and then mixing and stirring the straw liquefaction liquid and the soil, or directly spraying or irrigating the straw liquefaction liquid.
The straw comprises: the straw is made from crop straws such as corn straws, corncobs, rice straws, wheat straws, sunflower straws, cotton straws, sorghum straws, tomato straws, pepper straws and plant wastes containing cellulose and hemicellulose structures such as branches, leaves and shells.
A preparation method of straw liquefied liquid for improving soil comprises the following steps:
A. cutting the straws to the length of 1-20 cm;
B. putting the cut straws into a reaction kettle, adding water according to the mass ratio of the straws to the water of 1: 10-1: 50, wherein the volume of the added water is not more than 1/2 of the volume of the reaction kettle;
C. sealing the feed inlet of the reaction kettle, and starting a heating device;
D. heating the reaction kettle to 200-320 ℃, and controlling the pressure in the reaction kettle to be 10-15 MPa;
E. keeping the temperature for 0.1-2 h;
F. closing the heating device of the reaction kettle;
G. starting a reaction kettle cooling device, and cooling to room temperature;
H. discharging the straw liquefied liquid through a discharging port of the reaction kettle;
I. analyzing and measuring the pH value, N, P, K and organic matter content of the straw liquefied liquid;
J. detecting the pH value, N, P, K and organic matter content of the unmodified soil;
K. calculating the concentration and the quantity of the straw liquefied liquid according to the crop planting requirement or soil requirement index;
l, mixing the straw liquefied liquid with the improved soil according to the calculation result;
m, detecting the mixed soil, and correcting according to the detection result so as to meet the technical indexes of improving the pH value and N, P, K of the soil.
The soil improvement method comprises the steps of mixing the straw liquefied liquid meeting the technical indexes of improving the pH value and N, P, K of the soil with the soil to be improved, or spraying or irrigating the straw liquefied liquid meeting the technical indexes with the soil to be improved; or spraying or sprinkling irrigation is carried out on the plants to be planted in the improved soil.
Has the advantages that: the straw liquefied liquid for improving the soil and the method for improving the soil do not use any catalyst, and only adopt water as a medium to liquefy the straws. The obtained product has the humic acid component close to that of a product of natural decomposition of straws, has double functions of improving the pH value of soil and supplementing nutrition, can balance the pH value of the soil after being applied, can supply nutrient nutrients of nitrogen, phosphorus, potassium and organic matters which are lacked in the soil, promotes the growth of crops and improves the yield. The straw liquefaction method is simple, strong in practicability, wide in application range and short in transportation radius. On the basis of not changing the original farming habit, the method can greatly reduce the use amount of chemical fertilizers, increase the economic income of farmers, improve the use enthusiasm of the farmers and reduce the burning of straws. The soil structure is improved, and simultaneously, the environmental pollution caused by burning the straws is reduced. The straw liquefaction method can kill harmful germs left in the straws and reduce the harm of the straws carrying the harmful germs to subsequent cultivation.
The straw liquefaction method provided by the invention realizes liquefaction of the straw for 2-4 hours, has a short time and a temperature condition of 200-320 ℃ compared with a fermentation fertilizer preparation method, and has low temperature and low energy consumption compared with a method for preparing a biochar fertilizer by using the straw. The full-liquefaction treatment of the crop wastes is realized, a small amount of biomass charcoal generated in the process is also beneficial to improving the soil structure, and the utilization rate of the straw or the crop wastes is high.
The straw liquefaction liquid only adopts water as a medium to liquefy the straw. The obtained product is very close to humic acid which is a product of natural decomposition of straws, has double functions of improving the pH value of soil and supplementing nutrition, can balance the pH value of the soil after being applied, can supply nutrient nutrients of nitrogen, phosphorus, potassium and organic matters which are lacked in the soil, promotes the growth of crops, improves the yield, and realizes the high utilization rate and the rapid returning of the straws to the field;
soil and vinpocetine black soil with different salinization degrees in the Chinese and western parts of Jilin province are selected to be mixed with the straw liquefied solution for carrying out a wheat cultivation experiment. According to the experimental result, after the straw liquefied liquid is applied, the germination rate of the wheat is improved by about 8-50%, and the growth height is improved by 9-20%. Experimental results prove that the straw liquefied liquid can balance the pH value of soil, supply nutrient nutrients such as nitrogen, phosphorus, potassium and organic matters which are lacked in the soil, promote crop growth, improve yield and realize high-utilization-rate rapid returning of the straws to the field after being applied. The straw liquefied liquid can increase soil fertility and crop yield, and is also suitable for improving saline-alkali soil.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
a straw liquefied liquid for improving soil is prepared by taking crop straws as a main raw material, carrying out straw liquefaction on the straws and water according to a mass ratio of 1: 10-1: 50 at a constant temperature of 200-320 ℃ and under 10-15 MPa for 0.1-2 h, and then mixing and stirring the straw liquefied liquid and the soil, or directly spraying or pouring the straw liquefied liquid.
The straw comprises: the straw is made from crop straws such as corn straws, corncobs, rice straws, wheat straws, sunflower straws, cotton straws, sorghum straws, tomato straws, pepper straws and plant wastes containing cellulose and hemicellulose structures such as branches, leaves and shells.
A preparation method of straw liquefied liquid for improving soil comprises the following steps:
A. cutting the straws to the length of 1-20 cm;
B. putting the cut straws into a reaction kettle, adding water according to the mass ratio of the straws to the water of 1: 10-1: 50, wherein the volume of the added water is not more than 1/2 of the volume of the reaction kettle;
C. sealing the feed inlet of the reaction kettle, and starting a heating device;
D. heating the reaction kettle to 200-320 ℃, and controlling the pressure in the reaction kettle to be 10-15 MPa;
E. keeping the temperature for 0.1-2 h;
F. closing the heating device of the reaction kettle;
G. starting a reaction kettle cooling device, and cooling to room temperature;
H. discharging the straw liquefied liquid through a discharging port of the reaction kettle;
I. analyzing and measuring the pH value, N, P, K and organic matter content of the straw liquefied liquid;
J. detecting the pH value, N, P, K and organic matter content of the unmodified soil;
K. calculating the concentration and the quantity of the straw liquefied liquid according to the crop planting requirement or soil requirement index;
l, mixing the straw liquefied liquid with the improved soil according to the calculation result;
m, detecting the mixed soil, and correcting according to the detection result so as to meet the technical indexes of improving the pH value and N, P, K of the soil.
The soil improvement method comprises the steps of mixing the straw liquefied liquid meeting the pH value and N, P, K technical indexes of the improved soil with the soil to be improved, or spraying or irrigating the straw liquefied liquid meeting the technical indexes and the soil to be improved; or spraying or sprinkling irrigation is carried out on the plants to be planted in the improved soil.
Example 1
Selecting agricultural waste corn straws as a raw material, and cutting 15g of corn straws into the length of 20 cm; placing the cut corn straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 320 ℃ and the pressure at 15MPa, and keeping the temperature for 0.5h, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 3.80, and the contents of nitrogen, phosphorus, potassium and organic matters are 1948.0mg/kg, 422.4mg/kg, 52000.0mg/kg and 26.5g/kg respectively.
Mixing 200ml of the corn stalk liquefied liquid with 1kg of saline-alkali soil in the middle and western parts of Jilin province, and changing the pH value of the improved saline-alkali soil from 8.65 to 6.72 by analysis and measurement; the nitrogen content is increased from 18.84mg/kg to 86.12mg/kg, the phosphorus content is increased from 15.95mg/kg to 24.50mg/kg, and the potassium content is increased from 136.80mg/kg to 1451.25 mg/kg. The germination rate of the planted wheat is changed from 66.67% to 80% compared with that before improvement, and the plant height of the wheat is increased by 8.2% compared with that before improvement.
Example 2
Selecting agricultural waste corncobs as raw materials, and cutting 15g of corncobs into 1 cm; putting the cut corncobs and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 260 ℃, the pressure at 13MPa and the heat preservation time at 0.1h, and cooling to obtain a corncob liquefied solution;
the pH value of the liquid phase part is 3.20, and the contents of nitrogen, phosphorus, potassium and organic matters are 2280.0mg/kg, 420mg/kg, 21000.0mg/kg and 27.4g/kg respectively.
Taking the example of improving saline-alkali soil in the middle and western parts of Jilin province by 1.5kg per 100ml of the corncob liquefied liquid by spraying and irrigating, the pH value of the improved saline-alkali soil is changed from 8.25 to 7.33 by analysis and measurement; the nitrogen content is increased from 45.22mg/kg to 186.88 mg/kg; the phosphorus content is increased from 29.74mg/kg to 54.12 mg/kg; the potassium content is increased from 60.81mg/kg to 1431.25mg/kg, the germination rate of the planted wheat is changed from 70% to 85% before improvement, the plant height of the wheat is increased by 10% before improvement, the disease resistance and growth of the wheat are realized, and the plumpness of fruits is obviously improved.
Example 3
Selecting agricultural waste wheat straws as a raw material, and cutting 50g of wheat straws into 20 cm; putting the cut wheat straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 200 ℃ and the pressure at 10MPa, keeping the temperature for 1h, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 3.30 through analysis, and the contents of nitrogen, phosphorus, potassium and organic matters are 6023.2mg/kg, 1478.1mg/kg, 33796.5mg/kg and 80.6g/kg respectively.
Stirring and mixing 300ml of wheat straw liquefied liquid with 1kg of saline-alkali soil in the middle and western parts of Jilin province, and changing the pH value of the improved saline-alkali soil from 9.05 to 7.12 by experimental analysis; the nitrogen content is increased from 15.14mg/kg to 89.12mg/kg, the phosphorus content is increased from 13.18mg/kg to 36.50mg/kg, and the potassium content is increased from 56.80mg/kg to 1151.25 mg/kg. After wheat was planted, 50ml of a 30% water dilution of the above stalk liquefaction solution was sprayed to the plants every 7 days. The germination rate of the planted wheat is changed from 28.17% to 78.20% compared with that before improvement, and the plant height of the wheat is increased by 19.2% compared with that before improvement.
Example 4
Selecting agricultural waste cotton straws as raw materials, and cutting 10g of cotton straws into 2 cm; putting the cut cotton straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 200 ℃ and the pressure at 10MPa, keeping the temperature for 2 hours, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 4.20, and the contents of nitrogen, phosphorus, potassium and organic matters are 1321.8mg/kg, 329.1mg/kg, 28796.5mg/kg and 14.6g/kg respectively.
Stirring and mixing 200ml of cotton straw liquefied liquid and 1kg of saline-alkali soil in the middle and western parts of Jilin province, and changing the pH value of the improved saline-alkali soil from 8.65 to 7.33 by experimental analysis; the nitrogen content is increased from 18.84mg/kg to 66.12mg/kg, the phosphorus content is increased from 15.95mg/kg to 20.59mg/kg, and the potassium content is increased from 136.80mg/kg to 1011.36 mg/kg. After the cotton is planted, the plant height of the cotton is increased by 9.2 percent compared with that before the improvement.
Example 5
Selecting agricultural waste sunflower straws as a raw material, and cutting 50g of the sunflower straws into 5 cm; placing the cut sunflower straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 200 ℃ and the pressure at 15MPa, keeping the temperature for 1h, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 3.75, and the contents of nitrogen, phosphorus, potassium and organic matters are 6153.6mg/kg, 1392.6mg/kg, 136986mg/kg and 41.8g/kg respectively.
Stirring and mixing 200ml of sunflower straw liquefied liquid with 1kg of saline-alkali soil in the middle and western parts of Jilin province, and changing the pH value of the improved saline-alkali soil from 8.65 to 6.83 by experimental analysis; the nitrogen content is increased from 18.84mg/kg to 136.92mg/kg, the phosphorus content is increased from 15.95mg/kg to 30.99mg/kg, and the potassium content is increased from 136.80mg/kg to 2158.26 mg/kg. After planting the sunflower, the plant height of the sunflower is increased by 13.5 percent compared with that before improvement.
Example 6
Selecting agricultural waste tomato straws as raw materials, and cutting 50g of tomato straws into 5 cm; putting the cut tomato straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 200 ℃ and the pressure at 10MPa, keeping the temperature for 0.5h, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 3.54, and the contents of nitrogen, phosphorus, potassium and organic matters are 5986.8mg/kg, 1286.3mg/kg, 96396mg/kg and 41.2g/kg respectively.
Mixing 200ml of tomato straw liquefied liquid with 1kg of saline-alkali soil in the middle and western parts of Jilin province, and analyzing and measuring to change the pH value of the improved saline-alkali soil from 8.65 to 6.71; the nitrogen content is increased from 18.84mg/kg to 119.18mg/kg, the phosphorus content is increased from 15.95mg/kg to 27.65mg/kg, and the potassium content is increased from 136.80mg/kg to 1568.2 mg/kg. After tomato seedlings are cultivated, 50ml of 30% water dilution of the straw liquefaction solution is sprayed on the plants every 7 days. Tomato yield increased by 18.6% compared to before improvement.
Example 7
Selecting agricultural waste pepper straws as raw materials, and cutting 50g of pepper straws into 5 cm; putting the cut pepper straws and 500g of water into a closed reaction kettle for liquefaction, controlling the temperature at 200 ℃ and the pressure at 10MPa, keeping the temperature for 0.1h, and cooling to obtain straw liquefied liquid;
the pH value of the straw liquefied liquid is 3.62, and the contents of nitrogen, phosphorus, potassium and organic matters are 6586.8mg/kg, 1486.3mg/kg, 112396mg/kg and 41.4g/kg respectively.
Mixing 200ml of pepper straw liquefied liquid and 1kg of saline-alkali soil in the middle and western parts of Jilin province, and analyzing and measuring to change the pH value of the improved saline-alkali soil from 8.65 to 6.83; the nitrogen content is increased from 18.84mg/kg to 123.52mg/kg, the phosphorus content is increased from 15.95mg/kg to 29.18mg/kg, and the potassium content is increased from 136.80mg/kg to 1756.9 mg/kg. After pepper seedlings are cultivated, 50ml of 30% water diluent of the straw liquefaction solution is sprayed on the plants every 7 days. The yield of the pepper is increased by 17.3 percent compared with the yield before improvement.
Claims (4)
1. A straw liquefaction liquid for improving soil is characterized in that crop straws are used as a main raw material, no catalyst is added, the straws and water are subjected to straw liquefaction at a mass ratio of 1: 10-1: 50 under the conditions of 200-260 ℃ and 10-15 MPa for 0.1-2 hours, and then the straw liquefaction liquid is mixed with the soil or directly sprayed and irrigated;
the preparation method of the straw liquefied liquid for improving soil is characterized by comprising the following steps of:
A. cutting the straws to the length of 1-20 cm;
B. putting the cut straws into a reaction kettle, adding water according to the mass ratio of the straws to the water of 1: 10-1: 50, wherein the volume of the added water is not more than 1/2 of the volume of the reaction kettle;
C. sealing the feed inlet of the reaction kettle, and starting a heating device;
D. heating the reaction kettle to 200-260 ℃, and controlling the pressure in the reaction kettle to be 10-15 MPa;
E. keeping the temperature for 0.1-2 h;
F. closing the heating device of the reaction kettle;
G. starting a reaction kettle cooling device, and cooling to room temperature;
H. discharging the straw liquefied liquid through a discharging port of the reaction kettle;
I. analyzing and measuring the pH value, N, P, K and organic matter content of the straw liquefied liquid;
J. detecting the pH value, N, P, K and organic matter content of the unmodified soil;
K. calculating the concentration and the quantity of the straw liquefied liquid according to the crop planting requirement or soil requirement index;
l, mixing the straw liquefied liquid with the improved soil according to the calculation result;
m, detecting the mixed soil, and correcting according to the detection result so as to meet the technical indexes of improving the pH value of the soil and N, P, K.
2. The soil improvement straw liquefaction liquid as claimed in claim 1, wherein the straw comprises: corn straw, rice straw, wheat straw, sunflower straw, cotton straw, sorghum straw, tomato straw and pepper straw.
3. The method for preparing the straw liquefied liquid for improving the soil as claimed in claim 1, comprising the steps of:
A. cutting the straws to the length of 1-20 cm;
B. putting the cut straws into a reaction kettle, adding water according to the mass ratio of the straws to the water of 1: 10-1: 50, wherein the volume of the added water is not more than 1/2 of the volume of the reaction kettle;
C. sealing the feed inlet of the reaction kettle, and starting a heating device;
D. heating the reaction kettle to 200-260 ℃, and controlling the pressure in the reaction kettle to be 10-15 MPa;
E. keeping the temperature for 0.1-2 h;
F. closing the heating device of the reaction kettle;
G. starting a reaction kettle cooling device, and cooling to room temperature;
H. discharging the straw liquefied liquid through a discharging port of the reaction kettle;
I. analyzing and measuring the pH value, N, P, K and organic matter content of the straw liquefied liquid;
J. detecting the pH value, N, P, K and organic matter content of the unmodified soil;
K. calculating the concentration and the quantity of the straw liquefied liquid according to the crop planting requirement or soil requirement index;
l, mixing the straw liquefied liquid with the improved soil according to the calculation result;
m, detecting the mixed soil, and correcting according to the detection result so as to meet the technical indexes of improving the pH value of the soil and N, P, K.
4. The soil improvement method of straw liquefied liquid for soil improvement as claimed in claim 1, wherein the straw liquefied liquid satisfying technical index of N, P, K for improving pH of soil is applied to the soil to be improved or the crops to be planted.
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| CN108299032A (en) * | 2018-04-11 | 2018-07-20 | 吉林大学 | A method of quickly preparing organic fertilizer |
| CN113277905A (en) * | 2021-05-27 | 2021-08-20 | 吉林大学 | Method for preparing fertilizer from phosphated residue, phosphated residue fertilizer and application |
| CN113943189A (en) * | 2021-12-07 | 2022-01-18 | 梁鹏举 | Method for preparing biomass compound liquid organic fertilizer by utilizing agricultural wastes |
| CN115849987A (en) * | 2022-11-25 | 2023-03-28 | 黑龙江世纪云天化农业科技有限公司 | Soil improvement type liquid fertilizer and preparation method thereof |
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Application publication date: 20160928 Assignee: Xigou aquaculture Park, Shizui Town, Panshi City Assignor: Jilin University Contract record no.: X2020220000010 Denomination of invention: A straw liquefaction liquid for improving soil and its preparation and soil improvement method Granted publication date: 20200317 License type: Common License Record date: 20201116 |
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