水稻强化栽培下不同氮肥管理对产量与氮素利用的影响

以籼型单季超级杂交稻中浙优1号为材料,研究水稻强化栽培氮肥管理对产量与氮素利用率的影响。结果表明:水稻强化栽培与常规栽培对照比较,增产达11.1%-15.2%,氮肥回收率比对照高5.3%~26.9%,农学利用率比对照高67.2%~92.2%,生理利用率比对照高6.0%~80.5%。因此,在水稻生产上应用水稻强化栽培可以提高氮肥的利用,降低氮肥在环境中积累及对环境造成污染。此外,本文对水稻强化栽培下氮肥管理的高产机理进行了探讨。

Effect of Nitrogen Management on Grain Yield and Nitrogen Utilization under the System of Intensified Rice Cultivation

The experiment of rice intensification system(SRI) was carried out using super hybrid rice(Zhongzheyou 1) as material to investigate the grain yield and nitrogen utilization under different nitrogen managements.The results showed: the grain yield of SRI was 11.1%-15.2% greater than that of CK,and the assimilation efficiency,agronomic efficiency,and physiological efficiency of nitrogen fertilizer were 5.3%-26.9%,67.2%-92.2%,and 6.0%-80.5% greater than those of CK,respectively.Hence,nitrogen utilization efficiency,and eliminated accumulation of N fertilizer and its impact on the environment were enhanced under the system of rice intensification.Moreover,the high-yield mechanism of N fertilizer management under the system of rice intensification was discussed in the paper.