Nitrogen fertilizer solidifying method by active soil, flocculant, adsorbent composite material and fertilizer

Abstract

This invention discloses active soil and flocculant, absorbent complex material nitrogen fertilizer fixation method. Sagging bar soil, active chitosan, polyacrylamide and nitrogen fertilizer are used as certain ratio to prepare one kind of new style slow release, low cost and high efficiency solid nitrogen fertilizer. Nitrogen ion is absorbed and fixed through above materials synergistic reaction to prevent fertilizer active ingredient dissipating. Fixation time and crop growing fertilizer phase is same, they are fully absorbed by crops and fertilizer draining or volatilizing is reduced. At the same time, because nitrogen element is efficiently prevented from entering water body, water body nutrition controlling and agricultural ecology environment protection is reached. Traditional fertilizer is placed, and fertilizer using dosage can be reduced, so it has great value for controlling water body nutrition source pollution and protecting ecology environment.

Description

technical field [0001] The method relates to a novel method for long-term immobilization of chemical nitrogen fertilizers, which can effectively improve the utilization rate of chemical fertilizers and reduce non-point source pollution of water bodies. Background technique [0002] The current utilization rate of chemical fertilizers in my country is very low, with nitrogen, phosphorus, and potassium fertilizers being 25% to 30%, 10% to 25%, and 35% to 50%, respectively. At present, my country uses 240 kilograms of chemical fertilizer per hectare, and the amount of fertilizer per unit area is 1.6 times the world average. The utilization rate of chemical fertilizers in my country is much lower than that of developed countries, and the use efficiency of chemical fertilizers is showing a downward trend. The annual loss of nitrogen due to fertilization in the country reaches 16.5 million tons, and the economic loss is nearly 100 billion yuan. The most important thing is that it...

AI Technical Summary

Problems solved by technology

[0005] Third, the pollution of agricultural products; the most worrying thing about chemical fertilizers is the accumulation of nitrate

Excessive fertilization can lead to a large amount of nitrate accumulation in leaves, stems and roots, which is harmful to humans and livestock that feed on it

[0006] Fourth, chemical fertilizers pollute the soil; on the one hand, a large amount of fertilization can easily cause soil compaction

On the other hand, a large amount of fertilization may cause the reduction and elimination of sensitive biological species in the soil, destroy the ecological balance of farmland, and affect biodiversity

[0007] Fifth, poisonous to crops; raw materials for producing chemical fertilizers contain some trace elements, and some chemical fertilizers will also be mixed with various trace elements during the production process, such as copper, manganese, boron, molybdenum, zinc and other nutrients in apatite , as well as arsenic, cadmium, chromium, fluorine, mercury, nickel, lead and other ingredients harmful to plants

However, the complex production process or high production cost of slow-release fertilizers limit its large-scale promotion

More importantly: no matter what kind of slow-release fertilizer produced by the process, the release of nitrogen is still unable to achieve the "smart" release of nitrogen consistent with the S-type absorption of crops