施氮量对Y两优1号产量构成的影响

Effects of Nitrogen Application Rate on Yield Components of Super Hybrid Rice-Y Liangyou No.1

以超级杂交水稻Y两优1号为试验材料,设置6种施氮水平,比较研究不同供氮水平对超级杂交稻产量构成的影响。结果表明,施氮量与产量的关系呈单峰曲线,以N4处理产量最高,随着施氮量的进一步增加产量将略有下降。施氮水平对超级杂交稻Y两优1号产量构成的影响,在低施氮水平下表现为对每穗总粒数的影响;在高施氮水平下主要表现为对有效穗数的影响。除N0处理时结实率与其他施氮水平有显著差异外,不同施氮水平下水稻结实率和千粒重差异均不显著。研究还表明施氮量与产量构成关系最为密切,是影响产量构成的最主要因素。

Effects of six different nitrogen application rates on yield components of super hybrid rice were studied in this paper, and super hybrid flee Y Liangyou No.1 was taken as experimental material. The results showed that the relationship between nitrogen application rate and yield showed a single peak curve. The highest yield was gotten from N4 treatment, but it will be slightly decreased when the nitrogen application rate further increased. The effects of nitrogen application rates on yield components of super hybrid rice Y Liangyou No.1 were showed as follows： it affected grain number per panicle under the low level nitrogen application rate, and it affected effective panicle number under the high level nitrogen application rate. There were non-significant different seed set and 1000-grain weight between each nitrogen application treatment, except there was a significant different seed set between NO treatment and the other treatments. This study also showed that there was a most close relationship between nitrogen application rate and yield components, and it was a major factor impacted on yield components.