Water culture experiments were conducted to investigate the genotype differences of nitrogen nutrition between two varieties of early convention rice under two nitrogen concentrations. The results show that active uptake area and α NA oxidation ability of roots, total nitrogen contents, and protein nitrogen contents in leaves ,and stem sheaths and grains of high protein rice Xiangzaoxian24 are obviously higher than those of low protein rice Zhongyouzao81 under two nitrogen concentrations. Nitrate reductase activities and glutamine synthefase a...
