Effect of Potash Fertilizer on Yield and Economic Benefit of Multiple Cropping Green Radish in Autumn

Effect on yields,qualities and economic benefits of multiple cropping green radish in autumn after applying potash fertilizer with different level was studied in eastern agricultural areas of Qinghai.The results showed that applying potash fertilizer could increase the yields of green radish on the basis of applying 152.25 kg/hm2 N,138 kg/hm2 P2O5.Within the range of 45~180 kg K2O per hectare,the yields increased from 1.69% to 22.03 %,compared with the treatment without potash fertilizer.Especially,the increased yields of K2O 90 kg/hm2 treatment was highest(15.36 t/hm2) among all the treatments with potash.The net income(2 860.30 yuan/hm2) was highest and it's VCR was up to 13.64∶1.According to the research results,the optimum range of potash fertilizer application was 90~135 kg/hm2.