A kind of mixed fertilizer and its application for targeting matching nitrogen demand for rice

Abstract

The invention discloses a mixed fertilizer for targeted matching of nitrogen requirements for rice and application. The mixed fertilizer comprises first plant oil-based polyurethane coated urea and second plant oil-based polyurethane coated urea, the first plant oil-based polyurethane coated urea and the second plant oil-based polyurethane coated urea are mixed according to the mass ratio of 3: 7,and the mass percent of nitrogen in the mixed fertilizer for targeted matching of nitrogen requirements for rice is 41%-42%. According to the targeting mixed fertilizer for rice, stable double-peak nitrogen supply from the tillering stage and ear differentiation to the heading stage is realized; compared with conventional quick-acting nitrogen fertilizer high-yield fractional fertilization, the mixed fertilizer has the advantages that the yield is increased by 9.9% through one-time fertilization, the nitrogen fertilizer utilization efficiency is increased by 14.0%, the main nitrogen loss of arice field caused by ammonia volatilization is reduced by 57.4%, and cost saving and efficiency increasing are achieved by 24.9%.

Description

technical field [0001] The invention belongs to the technical field of fertilizer production, and in particular relates to a mixed fertilizer for rice targeting and matching nitrogen requirements and its application. Background technique [0002] Rational application of nitrogen fertilizer is the key to increase rice yield and reduce environmental pollution. In order to synchronize the "bimodal" nitrogen requirements from tillering stage and panicle differentiation to heading stage of rice, traditional high-efficiency nitrogen fertilizer management generally adopts the "one base and three topdressing" fertilization technology including base fertilizer, tillering fertilizer, flower-promoting fertilizer and flower-preserving fertilizer. However, this method has many problems such as high labor cost, difficulty in mastering technology, strong influence of seasonal rain, and poor mechanization operability, which makes it difficult to meet the needs of large-scale rice planting u...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the nitrogen release of existing single and mixed controlled-release fertilizers cannot accurately synchronize the "double-peak" nitrogen absorption law from the tillering stage and ear differentiation to the heading stage of rice, and a targeted matching fertilizer for rice is provided. Nitrogen Requirement Mixed Fertilizer and Its Application

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