Soil nitrogen synergist applying to straw and preparation method

Abstract

The invention discloses a nitrogen element synergistic agent in straw-application soil and a preparation method thereof. The synergistic agent consists of the following raw materials in certain mixture ratio: cycloheximide or natamycin, tetracycline or oxytetracycline, streptomycin, silica, a wetting agent NNO and nekal BX. The preparation method comprises the following steps: A.. the cycloheximide or the natamycin, the tetracycline or the oxytetracycline, the streptomycin and the silica are premixed according to the proportion; B. the wetting agent NNO and the nekal BX is added to the obtained mixture, are subjected to secondary mixing; and C. the obtained mixture is dried, crushed, sifted and packaged under certain condition. The synergistic agent has the advantages of simple method, small energy consumption, no pollution to environment, long quality guarantee period, convenient use, safe operation, low cost, no toxicity and no side effect on human, animal and plant and safety to biological environment; and the effective nitrogen content of the straw-application soil is increased by 50 to 120 percent, thereby alleviating crop pest in straw application. The method is suitable forapplication to improve effective nitrogen in soils with difficult types when various crop straws are returned to the field or the soil.

Description

technical field [0001] The invention relates to the technical field of soil nutrient and fertilizer effectiveness, and more specifically relates to a soil nitrogen synergist for applying rice straw. It also relates to a method for preparing a soil nitrogen synergist for applying rice straw, which is suitable for improving the availability of soil and fertilizer nitrogen when applying straw such as straw in agricultural production. Background technique [0002] Nitrogen is one of the macroelements necessary for plant growth and development. Nitrogen fertilizer application is a key technical measure to improve soil nitrogen supply capacity and maintain high crop yield. However, the long-term and large-scale application of chemical nitrogen fertilizers has increasingly serious adverse effects on the physical and chemical properties of soil, the quality and safety of agricultural products, and the ecological environment. Straw returning and application of organic fertilizers c...

AI Technical Summary

Problems solved by technology

However, the main problem of straw returning to the field (or returning to the soil) is that after the straw is applied, the microorganisms in the soil grow and multiply in large quantities. Due to the high carbon-nitrogen ratio of the straw, the soil nitrogen is fixed by microorganisms, which reduces the available nitrogen content of the soil. content, resulting in the lack of nitrogen nutrients in crops, especially in the early stage of rice straw application.

The study by Peng Na et al. in 2007 showed that the availability of nitrogen in the paddy field soil was significantly reduced when the rice straw was applied for 14-20 days, and the nitrogen availability of the rice straw applied to the soil was more obvious when the wet and dry alternately

At the same time, rice straw returning to the field accelerates the growth and reproduction of crop pathogenic microorganisms, causing serious crop diseases.

No method has been found to prevent the reduction of soil available nitrogen content when rice straw is applied

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