Effect of Different NPK Composition and Dose on Yield and Economic Benefit of Winter Rape: Xiangzayou763

摘要

In order to determine the suitable NPK account for this eugenic winter rape: Xiangzayou763, field and pot experiment was set up during the year 2008-2010 and optimized the ratio and dose of NPK by the laboratory test method during harvest period, in which the yield in all treatments and economic benefits would be investigated. The result shows that with NPK ratio at (N:P2O5:K2O) 1:0.50:0.50, fertilizers N, P2O5, K2O supply at 180 kg/hm2, 90 kg/hm2, 90 kg/hm2, it is the best suitable way for NPK usage, with which winter rape takes the largest oilseed yield, reaching 2231.13 kg/hm2. On the yield component factors of correlation, the maximum was found between single stub cape fruit number and output, followed by Seed numbers per pod, mass of 1000 grains respectively; and the nitrogen had the maximal impact on the yield of winter oilseed rape, followed by phosphorus and potassium. According to the above ratio, the grain output value was 9816.97 Yuan/hm2, in which only 1641.23 Yuan/hm2 for fertilizer investment, the fertilized efficiency value reached 6741.34 Yuan/hm2, then the VCR reached 4.11.