The results show that DPR can obviously improve ability of nitrogenmetabolism in functional leaves and steam-sheaths of rice in stage of reproductive growth, and enhance the contents of protein N in grain and brown of rice.

• 结果表明水稻齐穗后喷施DPR能明显改善水稻功能叶和茎鞘氮素代谢的能力；提高其籽粒和糙米中蛋白氮含量及籽粒的蛋白质产量.