Study On Yield of the Rape in Different Nitrogen and Density

Using quadratic rotational regression combination design to study the influence on yield of the rape under the different nitrogen and density. The result showed that the yield which was influenced by active silique of the field mainly provided a parabola when nitrogen and density increased, the relative index and the determine index of yield and active silique was 0.9577 and 0.9171 respectively. The study also indicated that the best combination was in the range of nitrogen from 214.4 to 256.9 kg per hm2 and density from 101 to 111 thousand individual per hm2.