Studies on Effects of the Application Rate of Chemical Nitrogen Fertilizer on Yield and Quality and Nitrogen Fertilizer Utilization Ratio of Vegetables
In order to provide the rational application rate of chemical nitrogen for rational culture of vegetables. The trace technique of l5N-labelled nitrogen was used to study; and effects of the application rate of chemical nitrogen fertilizer on yield and quality (nitrate content, protein content, soluble sugar content, rough fiber content and Vitamin C content) nitrogen fertilizer utilization ration of four vegetables(Water spinach; Asparagus lettuce; Brassica chinensis; Radish) have been studied by pot experi...