Nutrient slow-release acidic soil conditioner and preparation method thereof

Abstract

The invention provides a nutrient slow-release acid soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The soil conditioner comprises the following components in parts by weight: 1 to 5 parts of selenium-enriched chitosan, 5 to 12 parts of potassium fulvate, 40 to 60 parts of rice husk carbon, 20 to 25 parts of traditional Chinese medicine residues, 5 to 30 parts of quick lime, 50 to 60 parts of modified polylactic acid, 10 to 20 parts of hydroxyapatite, 10 to 15 parts of a chemical fertilizer, 30 to 40 parts of zeolite powder, 0.01 to 0.1 parts of a compound microbial fertilizer, 80 to 100 parts of crop straw powder and 1 to 5 parts of an adhesive. After the soil conditioner is used for improving soil, the soil becomes looser, the air permeability and penetrability of the soil are more excellent, the quantity of soil microorganisms and the enzyme activity of the soil are increased accordingly, the pH is increased to be close to neutrality, and the soil quality becomes better. The soil improvement effect is obviously superior to that of a commercially available soil conditioner.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a nutrient slow-release acidic soil improver and a preparation method thereof. Background technique [0002] Soil improver, also known as soil conditioner, refers to a material that can improve soil physical properties and promote crop nutrient absorption, but does not provide plant nutrients itself. The principle of soil improver is to bond many small soil particles to form large ones. And water-stable aggregates are widely used in preventing soil erosion, reducing soil moisture evaporation or excessive transpiration, saving irrigation water, and promoting healthy plant growth. [0003] The soil improver also has the functions of moisture conservation and temperature increase, which can effectively increase soil moisture, increase the ground temperature of the plow layer, advance the growth period of crops by 2-7 days, and increase the soil moisture by about 5%. At the...

AI Technical Summary

Problems solved by technology

[0004] The normal growth and development of plants depends on a good soil environment, but in nature, there are often various obstacles in the soil where plants grow, limiting plant growth

High concentrations of H in acidic soils + 、Al 3+ , Mn 2+ and Fe 2+ etc.; when the pH value exceeds 7.5 or is lower than 6, phosphoric acid and calcium or iron and aluminum form a late-acting state, reducing the effectiveness

Calcium, magnesium and potassium are easily replaced and leached in acidic soil, while molybdenum is precipitated with free iron and aluminum in strong acidic soil, which reduces the effectiveness, and there are more hydrogen and sodium in strong acidic soil and strong alkaline soil , and lack of calcium, it is difficult to form a good soil structure, which is not conducive to crop growth, and the soil is too acidic to easily produce free Al 3+ and organic acids, which directly harm crops. Therefore, acidic soil has become a limiting factor for the development of agricultural production, and its improvement is very important for the development of agricultural production.

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