Application method of chemical fertilizer in fertilization reduction synergy of oilseed rape

Abstract

The invention discloses an application method of a chemical fertilizer in the fertilization reduction synergy of oilseed rape. The application method comprises the following steps: A, the type and the application amount of fertilizers are determined: the oilseed rape fertilizing amount is the total fertilizing amount of a nitrogen fertilizer (by pure nitrogen), a phosphorus fertilizer (by phosphoric pentoxide) and a potassium fertilizer (by potassium oxide), the use amount of the chemical fertilizer urea and the use amount of a nitrogen fertilizer synergist are calculated according to the total nitrogen amount of the chemical fertilizer, the use amount of a phosphorus activator is calculated according to the oilseed rape field plantation area, and the total phosphorus and potassium amount of the organic fertilizer is calculated; B, the organic fertilizer, the phosphorous fertilizer, the potassium fertilizer, the nitrogen fertilizer synergist and the phosphorus activator are uniformly once applied as a base fertilizer; C, the nitrogen fertilizer is applied in three stages, the phosphorus fertilizer and the potassium are once applied as a base fertilizer, a use amount ratio of the nitrogen fertilizer base fertilizer to a seedling fertilizer to a stem elongation fertilizer is (4-7):(1-3):(1-3), the base fertilizer is applied in furrows, the seedling fertilizer is applied in 10-40 days after oilseed rape seedlings are transplanted, and the stem elongation fertilizer is applied in 50-100 days after the oilseed rape seedlings are transplanted; and D, fertilization is not carried out in the post-emergence stage, the flowering stage or the maturation stage. The method has the advantages of easiness in implementation, simplicity in operation, reduction of the application of the chemical fertilizer, improvement of the quality of soil through applying the organic fertilizer, improvement of the nutrient utilization efficiency and increase of the yield of the oilseed rape.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilization, and more specifically relates to the application of a chemical fertilizer in reducing fertilization and increasing efficiency of rapeseed, which is mainly used in rapeseed cultivation areas in the middle and lower reaches of the Yangtze River. Background technique [0002] Rapeseed cultivation areas are mainly distributed in Jiangsu, Zhejiang, Hubei, Anhui and other provinces in the Yangtze River Basin, concentrated in the 28°-35° plain area, and the area is still gradually increasing. Rapeseed cultivation areas in the middle and lower reaches of the Yangtze River often use chemical fertilizers unreasonably in order to pursue high yields, which not only results in low fertilizer utilization rates, but also causes serious harm to the environment. In recent years, researches on the rationalization of fertilization based on optimized environment and the reduction of chemical ferti...

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Problems solved by technology

[0003] The present invention is aimed at the problems of large amount of chemical fertilizer application and low fertilizer utilization efficiency in rapeseed cultivation areas in the middle and lower reaches of the Yangtze River. good effect

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