Effects of Different Nitrogen Forms and Ratios on Yield,Quality,and Nutrient Uptake of Mini Chinese Cabbage
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 sig-nificantly.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 Cab-bage was reduced ,while the soluble sugars content was promoted .When the NO 3--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 ab-sorption of N ,P and K in plants .Throughout the entire growth period ,NH4+-N fertilization improved the plant N con-tent,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 NO 3--N∶NH4+-N ratio ranged from 5∶5 to 3∶7 could im-prove the quality and economic return of Mini Chinese Cabbage .
Mini chinese cabbageNitrogen formYieldQualityNutrient absorption
国家科技期刊平台
NSTL
万方数据
维普
