Straw decomposition promoting method and application thereof to acid soil improvement

Abstract

The invention belongs to the technical field of acid soil improvement and specifically relates to a straw decomposition promoting method and application thereof to acid soil improvement. According tothe method, straw is utilized as a raw material, and calcium salt and sepiolite powder are utilized as decomposition promoting aids; the two aids of the calcium salt and the sepiolite powder are combined, so that a straw decomposition process can be obviously quickened, and straw decomposition time is obviously shortened; meanwhile, mixed decomposition of the straw with human and livestock excrement is avoided, and environmental friendliness of a decomposition process is achieved; the calcium salt in the aids can improve a calcium content in a decomposition product, the sepiolite powder can provide a good place and a good environment for EM bacteria growth and propagation, a humic acid content in the decomposition product is increased, complexity is high, more metal ions can be combined, and soil base ion retention is facilitated. When the obtained decomposition product is applied to acid soil improvement, the pH of the soil can be obviously improved, a content of exchangeable aluminumis reduced, a content of soil microbial biomass carbon is further increased, and carbon metabolic activity of microorganisms is improved.

Description

technical field

[0001] The invention belongs to the technical field of acidic soil improvement, and in particular relates to a straw decay-promoting method and its application in acidic soil improvement. Background technique

[0002] Soil acidification is a common natural process in the process of soil formation and development. Acidic soil mainly exists in hot and rainy tropical and subtropical regions. Soil acidification will cause many harms, such as reducing soil cation exchange capacity, reducing soil base saturation, leading to a large loss of mineral nutrients, aggravating soil barrenness, and activation of toxic heavy metals, etc., which will affect the number and activity of soil microorganisms. Reduce the yield and quality of plant products.

[0003] In agricultural production, lime alkaline substances are generally used to improve acidified soil, but the use of lime cannot fundamentally solve the problem of soil acidification, and there are some adverse effects, ...

Examples

Embodiment 1

[0024] A straw rotting method, the specific operation steps are: Weigh 100g of rice straw crushed and passed through a 40-mesh sieve, mix it with 15g of additives (including 12.5g of calcium oxalate, 2.5g of sepiolite powder), and add 1.5g of EM bacteria at the same time solution and adjust the C / N mass ratio to 20 with urea, mix well and place it in a culture bottle, adjust the water content to about 60wt% with distilled water, and place it in a constant temperature incubator at 30°C for 30 days with constant temperature and ventilation. The water content is about 60wt%.

Embodiment 2

[0026] A method for promoting decay of straw, the specific operation steps are: take 100g of crushed rice straw and pass through a 40-mesh sieve, mix it with 25g of additives (including 21.4g of calcium hydroxide, 3.6g of sepiolite powder), and add 1.2g of EM Bacterial liquid and adjust the C / N mass ratio to 23 with urea, mix well and place it in a culture bottle, adjust the water content to about 63wt% with distilled water, and place it in a constant temperature incubator at 26°C for 32 days with constant temperature and ventilation. The water content is about 63wt%.

Embodiment 3

[0028] A method for promoting rotting of straw, the specific operation steps are: take 100g of crushed rice straw and pass through a 40-mesh sieve, mix it with 30g of additives (including 27.3g of calcium carbonate, 2.7g of sepiolite powder), and add 0.5g of EM bacteria solution and adjust the C / N mass ratio to 30 with urea, mix well and place it in a culture bottle, adjust the water content to about 70wt% with distilled water, and place it in a constant temperature incubator at 25°C for 40 days with constant temperature and ventilation. The water content is about 70wt%.

technical field

[0001] The invention belongs to the technical field of acidic soil improvement, and in particular relates to a straw decay-promoting method and its application in acidic soil improvement. Background technique

[0002] Soil acidification is a common natural process in the process of soil formation and development. Acidic soil mainly exists in hot and rainy tropical and subtropical regions. Soil acidification will cause many harms, such as reducing soil cation exchange capacity, reducing soil base saturation, leading to a large loss of mineral nutrients, aggravating soil barrenness, and activation of toxic heavy metals, etc., which will affect the number and activity of soil microorganisms. Reduce the yield and quality of plant products.

[0003] In agricultural production, lime alkaline substances are generally used to improve acidified soil, but the use of lime cannot fundamentally solve the problem of soil acidification, and there are some adverse effects, ...

Examples

Embodiment 1

[0024] A straw rotting method, the specific operation steps are: Weigh 100g of rice straw crushed and passed through a 40-mesh sieve, mix it with 15g of additives (including 12.5g of calcium oxalate, 2.5g of sepiolite powder), and add 1.5g of EM bacteria at the same time solution and adjust the C / N mass ratio to 20 with urea, mix well and place it in a culture bottle, adjust the water content to about 60wt% with distilled water, and place it in a constant temperature incubator at 30°C for 30 days with constant temperature and ventilation. The water content is about 60wt%.

Embodiment 2

[0026] A method for promoting decay of straw, the specific operation steps are: take 100g of crushed rice straw and pass through a 40-mesh sieve, mix it with 25g of additives (including 21.4g of calcium hydroxide, 3.6g of sepiolite powder), and add 1.2g of EM Bacterial liquid and adjust the C / N mass ratio to 23 with urea, mix well and place it in a culture bottle, adjust the water content to about 63wt% with distilled water, and place it in a constant temperature incubator at 26°C for 32 days with constant temperature and ventilation. The water content is about 63wt%.

Embodiment 3

[0028] A method for promoting rotting of straw, the specific operation steps are: take 100g of crushed rice straw and pass through a 40-mesh sieve, mix it with 30g of additives (including 27.3g of calcium carbonate, 2.7g of sepiolite powder), and add 0.5g of EM bacteria solution and adjust the C / N mass ratio to 30 with urea, mix well and place it in a culture bottle, adjust the water content to about 70wt% with distilled water, and place it in a constant temperature incubator at 25°C for 40 days with constant temperature and ventilation. The water content is about 70wt%.

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