Effects on yield and quality of flowering Chinese cabbage(Brassica campestric L.ssp.chinensis Var.utilis Tsenet Lee) treated with different water and nitrogen

The effects of nitrogen application and soil moisture on the yield and quality of flowering Chinese cabbage(Brassica campestric L.ssp.chinensis Var.utilis Tsenet Lee) were studied in pot test.The results indicated that there was significant difference in the yield of flowering Chinese cabbage supplied with different nitrogen rate under the same water treatment,and N_2(100mgN/kg soil) treatment showed the best effect on the yield.With increase of soil moisture,the yield was decreased significantly.The effect of N application was more significant than the soil moisture on the nitrate content of flowering Chinese cabbage.Soluble sugar content of flowering Chinese cabbage was increased significantly with the range of 31.65%-45.86% through applying nitrogen.The effects of treatment with N_2W_1(100mgN/kgsoil,60%/FC) was the best on yield and quality.Appropriate nitrogen supply in soil with the proper decrease of soil water content was an effective method to increase the yield and quality of vegetable.