Humic acid fertilizer for preventing soil hardening and preparation method thereof

Abstract

The invention discloses a humic acid fertilizer for preventing soil hardening and a preparation method thereof, and relates to the field of fertilizers. The fertilizer comprises master batch and a coating film coating the master batch. The master batch comprises the following components in parts by mass: 50-70 parts of urea, 30-40 parts of potassium nitrate, 10-30 parts of monoammonium phosphate, 10-30 parts of potassium sulfate, 0-5 parts of trace elements, 1-5 parts of polyaspartic acid, 0-5 parts of magnesium oxide, 0-5 parts of calcium carbonate and 5-15 parts of humic acid. The coating film is prepared from the following components in parts by mass: 20 to 30 parts of humic acid, 3 to 8 parts of starch, 5 to 10 parts of talcum powder, 5 to 10 parts of chitosan and 1 to 3 parts of polyacrylamide. The fertilizer can improve the utilization rate of the fertilizer, improves the soil structure, has a slow release effect, and improves the utilization rate of the fertilizer. Humic acid ion exchange can help soil to aggregate into a particle structure, so that the porosity and the air permeability are improved, and soil hardening is prevented.

Description

technical field [0001] The invention belongs to the field of fertilizers, and in particular relates to a humic acid fertilizer for preventing soil compaction and a preparation method thereof. Background technique [0002] Soil compaction refers to the phenomenon that the surface layer of the soil is poor in structure due to the lack of organic matter, and the structure is destroyed and the soil material is dispersed under the action of external factors such as irrigation or rainfall, and the soil surface is hardened by the cohesive force after drying. Under soil compaction, the soil porosity is reduced, the permeability is poor, and the ground temperature is lowered, which leads to the inhibition of the activities of aerobic microorganisms in the soil, the water, air, and heat conditions cannot be well coordinated, and its fertilizer supply, fertilizer, and water retention capabilities are weak. Soil compaction also delays the decomposition of organic matter, the physical an...

AI Technical Summary

Problems solved by technology

Under soil compaction, the soil porosity is reduced, the permeability is poor, and the ground temperature is lowered, which inhibits the activities of aerobic microorganisms in the soil, and the water, air, and heat conditions cannot be well coordinated, and its fertilizer supply, fertilizer, and water retention capabilities are weak.

Soil compaction also delays the decomposition of organic matter, the physical and chemical properties of the soil gradually deteriorate, the soil fertility gradually declines, and the soil fertility decreases accordingly, which cannot well meet the growth and development of plants; the respiration of plant root cells is weakened, and nutrients such as nitrogen are more in the form of ions. It exists in a state, and the absorption is mostly in the form of active transport, which needs to consume the energy produced by cell metabolism, and the respiration is weakened, so the energy supply is insufficient, which affects absorption

[0003] Fertilizer is an important tool to provide nutrients needed for crop growth, but long-term single partial application of chemical fertilizers will lead to soil compaction; soil aggregate structure is formed by the connection of negatively charged soil clay particles and organic matter through positively charged multivalent cations. Too much phosphate fertilizer will cause phosphate ions to combine with calcium and magnesium cations in the soil to form insoluble phosphate, which will destroy the soil aggregate structure and cause soil compaction; heavy nitrogen and light phosphorus and potassium fertilizers will reduce the organic matter of the soil, and the humus cannot be replenished in time, causing soil dehydration. compaction and cracking; therefore, research on fertilizers that prevent soil compaction to improve soil quality is of great significance for the sustainable development of agriculture

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