The Comparative Study on Yield of Rape Straw and NPK Contents in Rape Straw in Different Harvest Time

The Fengyou730,Xiangzayou No.7 and Zhongzayou No.2 were taken as experimental material to discuss the impacts of different harvest time on the yield of rape straw and NPK contents in rape straw.The results showed that there has a significant difference in the yield of rape straw and NPK contents in rape straw of different varieties and in different harvest time.