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Method for passivating phosphorus in soil

A soil and phosphorus technology, applied in land preparation methods, agriculture, applications, etc., can solve the problems of introducing and affecting crop nutrient absorption, and achieve the effect of improving the difficulty of absorption

Pending Publication Date: 2022-04-05
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome defects such as the introduction of calcium, iron, aluminum, magnesium and other metal elements in the process of phosphorus passivation in the prior art, which affect crop nutrient absorption, thereby providing a kind of phosphorus in soil passivation method

Method used

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  • Method for passivating phosphorus in soil
  • Method for passivating phosphorus in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a kind of passivation method of phosphorus in soil, comprises the following steps,

[0039] 1. Prepare the bacteria solution: based on the total volume of the bacteria solution, mix with water at the dosage of Bacillus Pasteurella bacteria powder 20g / L, ammonium sulfate 15g / L, and urea 10g / L, and use 0.1mol / L dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0040] 2. Fertilize and plow the soil to be repaired;

[0041] 3. Spray bacteria liquid 0.75L / m 2 , to plow;

[0042] 4. Plow the soil again after curing for 8 days.

Embodiment 2

[0043] Embodiment 2 (compared with embodiment 1, adopts different bacterial liquid)

[0044] The present embodiment provides a kind of passivation method of phosphorus in soil, comprises the following steps,

[0045] 1. Prepare bacterial solution: based on the total volume of the bacterial solution, mix it with water at the dosage of 20g / L of ordinary Desulfovibrio bacterial powder, 15g / L of ammonium sulfate, and 10g / L of urea, and use 0.1mol / L of dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0046] 2. Fertilize and plow the soil to be repaired;

[0047] 3. Spray bacteria liquid 0.75L / m 2 , to plow;

[0048] 4. Plow the soil again after curing for 8 days.

Embodiment 3

[0049] Embodiment 3 (compared with embodiment 1, adopts different bacterial liquid)

[0050] The present embodiment provides a kind of passivation method of phosphorus in soil, comprises the following steps,

[0051] 1. Prepare the bacterial solution: based on the total volume of the bacterial solution, mix with water at the dosage of Thiobacillus denitrificans bacteria powder 20g / L, ammonium sulfate 15g / L, and urea 10g / L, and use 0.1mol / L dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0052] 2. Fertilize and plow the soil to be repaired;

[0053] 3. Spray bacteria liquid 0.75L / m 2 , to plow;

[0054] 4. Plow the soil again after curing for 8 days.

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Abstract

The invention belongs to the technical field of soil phosphorus passivation, and particularly relates to a method for passivating phosphorus in soil. The method for passivating the phosphorus in the soil comprises the following steps: spraying a carbonate mineralizing bacterium solution into the soil to be repaired, and turning over. According to the soil phosphorus passivation method provided by the invention, only nutrients and carbonate mineralizing bacteria are externally added, and a large amount of salt and metal ions are not added into a soil system, so that the phosphorus adsorption site and saturation capacity of soil cannot be increased from a long-term perspective, and the phosphorus absorption difficulty of plants cannot be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of soil phosphorus passivation, and in particular relates to a method for passivating phosphorus in soil. Background technique [0002] At present, the farmland planting still adopts a rough and large-scale fertilization mode. Whether it is manure or chemical fertilizer, the application amount is much higher than the amount required by the plants, and this also causes a large surplus of nitrogen and phosphorus in the farmland soil. Different from nitrogen, phosphorus Elements are easily combined with minerals in the soil and stored in the soil plow layer. However, when phosphorus exceeding the upper limit of mineral binding capacity is added to the soil, the unadsorbed phosphorus will leach downward, bringing the risk of eutrophication. Therefore, removal or passivation of excess phosphorus needs to be considered. [0003] A large number of methods for the passivation of phosphorus elements have been develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00A01B79/02
Inventor 王祺刘亚茹熊静桂毅郭丽莉张孟昭李书鹏宋倩魏宁
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD