Influence of different ratios of NH_4~+/NO_3~- on nitrogen metabolism of cotton

This study was conducted under controlled hydroponics to value the influence of different nitrogen nutrition on nitrogen metabolism of young cotton.The results showed that the mixed nitrogen nutrition is helpful to soluble protein accumulation in leaves and roots of cotton.And the solution of 50/50 NH4+/NO3percentage is the best for root and 75/25 one for leaves.At the same time,the result showed that the different nitrogen nutrition led to the different accumulation of total nitrogen and NH4+-N,and also led to different nitrate reductase(NRA) activity and C/N,which affected the assumption and assimilation rate of the exogenous nitrogen nutrition.