Soil conditioner and preparation method thereof

Abstract

The invention relates to a soil conditioner, the soil conditioner is cured and molded granules, and the particle size of the granules is 2.0-3.8 mm; raw materials comprise the following components inpercentage by weight: 4% of biological fulvic acid, 5% of quick lime, 15%-18% of caustic calcined magnesite, 10%-12% of calcite powder, 60%-65% of dolomite powder and 1% of potassium humate. The preparation method of the soil conditioner comprises the following steps: (1) uniformly mixing the calcite powder and the dolomite powder to obtain mixed powder; (2) adding 20% of water into the mixed powder to obtain slurry; (3) adding the biological fulvic acid and the potassium humate into the slurry, and uniformly stirring; (4) adding the quick lime and the caustic calcined magnesite into the slurry, and uniformly stirring; (5) granulating when the slurry in the step (4) is self-heated and dehydrated into dry mud; and (6) standing the granular soil conditioner, and carrying out curing molding after secondary heat release to obtain the finished soil conditioner with the particle size of 2.0-3.8 mm.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to a soil conditioner and a preparation method thereof. Background technique [0002] China's agricultural production has used nitrogen, phosphorus, and potassium fertilizers for more than 40 years. While using the above fertilizers, soil acidification is serious, which affects the continuity of agricultural production. Soil conditioner, as the main technical means to control acidified soil, has a history of more than 20 years in China. [0003] Soil improver, also known as soil conditioner, is a medicine used to condition the elements of the soil. It is pollution-free and pollution-free, and is suitable for agriculture. Soil conditioners can improve soil physical, chemical and microbial reactions and increase soil fertility for those soils that have lost nutrients due to overuse or pollution. [0004] Existing soil conditioners generally have the following ef...

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Problems solved by technology

[0006] Aiming at the technical problems existing in the prior art, the present invention provides a soil conditioner and a preparation method thereof, which solves the problem that the existing powdery soil conditioner is difficult to spread, is not easy to remain in the soil for a long time, and is easy to penetrate into the ground with rainwater. The conditioning effect is not good, and it is easy to cause pollution to groundwater; the granular conditioner is easier to spread, can be retained in the soil for a long time, and the conditioning effect is better, but its preparation process is more complicated, and sometimes it needs to be accompanied by sintering and other processes. At least one of the problems of higher requirements on the process of granulation and molding, higher production costs, etc.

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