不同水稻品种对施氮量的响应研究

Response of Different Rice Varieties to Nitrogen Application

以两优培九和两优100为试验材料,研究在不同施氮水平下,2个品种在不同生育期的干物质积累量、茎蘖动态以及氮肥效率的差异。结果表明,在分蘖期和抽穗期,两优100和两优培九干物质最大积累量分别发生在156 kg/hm 2(N3)和208 kg/hm 2(N4)氮水平,最大分蘖期分别出现在N3和N4水平;在氮水平较低的条件下,两优100的氮肥农学效率和氮肥偏生产力均高于两优培九。说明两优100具有更高的氮素吸收效率,属于氮高效品种。

Liangyoupeijiu and Liangyou100 were used as experimental materials to study the differences of dry matter accumulation,tiller dynamics and nitrogen efficiency between two varieties at different growth stages under different nitrogen application levels.The results showed that the maximum dry matter accumulation of Liangyou100 and Liangyoupeijiu occurred at the level of 156 kg/hm 2(N3)and 208 kg/hm 2(N4)respectively,and the maximum tillers stage appeared at the level of N3 and N4 respectively.Under the condition of low N level,the agronomic efficiency and partial productivity of nitrogen fertilizer of Liangyou100 were higher than those of Liangyoupeijiu.The results showed that Liangyou 100 had higher nitrogen absorption efficiency and belonged to nitrogen efficient variety.