Abstract: A field experiment was conducted to study the effects of different nitrogen forms and their ratios (no-fertilize,NO₃^--N: NH₄⁺-N ratio 10: 0,7: 3,5: 5,3: 7,0: 10,CO(NH₂)₂-N,local traditional fertilizing amount) on the yield,quality and nutrient (N,P,and K) absorption of Mini Chinese Cabbage.The results were as follows:In different ratio of NO₃^--N: NH₄⁺-N,when NO₃^--N: NH₄⁺-N for 5: 5,the yield and economic benefit could improve significantly.The nitrate content was increased with increasing nitrate-N,decreasing ammonimn-N.The soluble protein content,the soluble sugars content and the soluble solids were promoted with increasing ammonimn-N.When the NO₃^--N: NH₄⁺-N ratio was ranged from 3: 7 to 0: 10,respectively,the accumulation of nitrate in Mini Chinese Cabbage was reduced,while the soluble sugars content was promoted.When the NO₃^--N: NH₄⁺-N ratio was ranged from 5: 5 to 3: 7,as well,the soluble protein content could be promoted.CK2(local traditional fertilizing amount) and T4(NO₃^--N: NH ₄₊-N ratio 3: 7) were good for increasing the soluble solids content.N fertilization increased the absorption of N,P and K in plants.Throughout the entire growth period,NH₄⁺-N fertilization improved the plant N content,whereas NO₃^--N fertilization improved the plant K content.At different growth stages,the effects of different N sources on plant P content varied.It was suggested that the NO₃^--N: NH₄⁺-N ratio ranged from 5: 5 to 3: 7 could improve the quality and economic return of Mini Chinese Cabbage.

Key words: Mini chinese cabbage, Nitrogen form, Yield, Quality, Nutrient absorption

CLC Number: 

• S143.1