Effects of Humic Acid Liquid Foliar Fertilizer on Yield and Quality of Chinese Cabbage

In order to use reasonably humic acid liquid foliar fertilizer to increase yield of Chinese cabbage,the effects of different concentrations of liquid humic acid foliar fertilizer on yield and quality of Chinese cabbage were studied by randomized block method.The results showed that 600 times of dilution was the most effective among all concentrations of liquid humic acid foliar fertilizer,the yield was increased significantly,reached 95 640 kg·hm-2,and was 11.45% more than CK.With the concentration of 600 times of dilution,the quality was improved significantly,the content of soluble sugar,protein and VC was increased significantly,the content of nitrate in the Chinese cabbage was declined.