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

A technology of mixed fertilizer and rice, applied in urea compound fertilizer, application, nitrogen fertilizer and other directions, can solve the problem of inability to accurately synchronize the "double peak" nitrogen absorption law, and achieve the effect of high production cost, increase yield and reduce ammonia volatilization

Active Publication Date: 2021-03-19
ANHUI AGRICULTURAL UNIVERSITY
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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

Method used

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

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Embodiment 1

[0026] The applicant conducted a field test with the mixed fertilizer of the present invention at the Lujiang Experimental Base of Anhui Agricultural University (31°48'N, 117°23'E) in 2019, using conventional urea artificially applied multiple times and no nitrogen fertilizer as a control example.

[0027] (1) Preparation of rice mixed fertilizer targeted to match nitrogen demand

[0028] The first vegetable oil-based polyurethane-coated urea and the second vegetable oil-based polyurethane-coated urea are prepared according to the mass ratio of 3:7, and the mass ratio of the coating material of the first vegetable oil-based polyurethane-coated urea to the core urea is: 2.5%, the mass ratio of the coating material of the second vegetable oil-based polyurethane coated urea to the core urea is 3.2%, and the nitrogen mass percentage in the rice mixed fertilizer targeted to match the nitrogen demand is 41%, The raw materials for the production of vegetable oil-based polyurethane co...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05C9/00C05G5/30C05G3/40A01G22/22A01C21/00A01B79/02
CPCA01B79/02A01C21/00A01G22/22C05C9/005
Inventor 柯健武立权陈婷婷何海兵尤翠翠
Owner ANHUI AGRICULTURAL UNIVERSITY
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