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通过4种不同水平施氮量(0、112.5、225.0、337.5 kg/hm2)对10个不同水稻品种(系)进行产量及构成因素研究,结果表明:在磷、钾标准施用和土壤条件背景一致,10个品种(系)在4种施氮标准下,品种(系)产量整体表现出从0~112.5 kg/hm2逐渐升高,然后112.5~337.5 kg/hm2产量降低的过程。结实率表现为随着施氮量的增加而降低,有效穗则随着施氮量的增加而增加,千粒重无明显变化。同时,不同的品种对氮肥的敏感度不同。
The yield and its components of 10 different rice cultivars (lines) at four different levels of nitrogen application (0,112.5,225.0,337.5 kg / hm2) were studied. The results showed that the standard application of phosphorus and potassium had the same background with soil conditions , 10 varieties (lines) Under the four nitrogen application rates, the yield of varieties (lines) showed a gradual increase from 0 ~ 112.5 kg / hm2 and then decreased from 112.5 ~ 337.5 kg / hm2. The seed setting rate decreased with the increase of nitrogen application rate. The effective panicle increased with the increase of nitrogen application rate, but no significant change of 1000-grain weight. At the same time, different varieties have different sensitivity to nitrogenous fertilizer.