不同施氮量对沙地春小麦株穗性状及产量的影响

Influence of Different Amount of Nitrogen on the Yield and Ear Characters of Spring Wheat

在内蒙古奈曼旗对沙地春小麦进行了氮肥施量试验。结果表明，不同施氮量（尿素１５．０～５１．５ｇ·ｍ－２）对沙地春小麦穗粒数、千粒重、有效小穗数及其百分率、籽粒产量、生物产量的影响具有显著差异，但对成穗数、株高的影响差异不明显。产量水平以施氮量为３７．５ｇ·ｍ－２时最高。

The experiment was carried out in Naiman Station, designing six levels (15.0 g\5m -2 , 21.5 g\5m -2 , 30.0 g\5m -2 , 37.5 g\5m -2 , 45.0 g\5m -2 , 51.5 g\5m -2 ) of treatments on the spring wheat growth in sandy farm land. The results show that the nitrogenous fertilizer affects the grain number, 1 000 grain weight, effective spikes, yield and biomass significantly, but does not on the ear amount and the height of wheat. To apply 37.5 g\5m -2 amount of urea produced the highest yield of grain (564.79 g\5m -2 ) and above ground biomass (1 511 g\5m -2 ).