Humic acid type acidic soil conditioner and preparation method and application thereof

Abstract

The invention provides a humic acid type acid soil conditioner. The humic acid type acid soil conditioner contains the following components in parts by weight: 20-40 parts of plant ash, 10-30 parts of humate, 10-30 parts of clay material, 15-35 parts of biochar and 5-15 parts of a silicon-calcium fertilizer. The invention further provides a preparation method and application of the humic acid type acid soil conditioner. The humic acid type acid soil conditioner has the beneficial effects that the raw material sources are wide, the pH value of acid soil can be increased, heavy metals such as lead and cadmium are settled and complexed, the soil is improved, the crop yield is increased, the absorption of plants to the heavy metals is inhibited, and the contents of the heavy metals in agricultural products are decreased.

Description

technical field [0001] The invention relates to the technical field of agricultural environment conservation and restoration, in particular to a humic acid-type acidic soil conditioner and its preparation method and application. Background technique [0002] Soil acidification is a manifestation of soil degradation. Soil acidification is not only an important reason for the decline of soil fertility, but also an important factor restricting the sustainable development of agricultural production. According to statistics, from the 1980s to the present, my country's soil acidification has become more and more serious, and the acidified land area has expanded to more than 40% of my country's cultivated land area, and often occurs in large areas, especially in southern my country. The soil itself is slightly acidic, and there is more rainfall, which makes the soil acidification more serious. [0003] Soil acidification can cause the activation of heavy metals such as aluminum, ma...

AI Technical Summary

Problems solved by technology

However, among various soil improvers, the high cost of artificially synthesized polymer compounds and the potential risk of environmental pollution limit its wide application; a single soil improver has incomplete improvement effects or negative effects to varying degrees Waiting for deficiencies

Patent CN 102321484 B discloses an organic environment-friendly soil conditioner for improving acidified or acidic soil. The soil conditioner produced by the invention can increase soil pH, increase nutrients such as calcium, magnesium, phosphorus, and potassium in soil, and increase soil Organic matter content, improve soil water and fertilizer retention capacity, improve soil physical and chemical properties, improve crop resistance (disease, insect, drought, etc.) ability, reduce heavy metal toxicity, but the product process is complicated, the cost is high, and the source of raw materials is not abundant

Patent CN200710029172.1 provides a method for preparing an acidic soil conditioner in dry land in southern China. The soil conditioner is prepared by using calcined shell products, calcium magnesium silicate and magnesium ammonium phosphate as raw materials. The soil conditioner uses inorganic substances and can only supplement soil The lack of calcium, magnesium, silicon and other elements in the soil cannot solve the problems of soil structure deterioration and microbial population reduction caused by soil acidification.

[0007] In addition, the current common soil conditioner production methods are mostly simple mixing, such as the soil conditioners disclosed in patents CN 103320140 A and CN106433650 A. In the soil conditioner formulations disclosed in the above patents, there are some ingredients with low content, which are simple Mixing is difficult to mix, or requires high equipment

In addition, such as the soil conditioner disclosed in CN 106433650 A, most of the ingredients are alkaline lime materials, which will react quickly after applying acidic soil, and can only adjust the soil pH value in a short period of time. The soil pH will gradually return to before the adjustment, and the timeliness is limited

[0008] For the technical problems existing in the above prior art description, no effective solution has been proposed yet

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