供氮水平对玉米生长性状及产量的影响

Effects of Nitrogen Supply on the Growth Traits and Yield of Maize

以内单314为试验材料,在氮素水平0(CK)、180 kg/hm2、270 kg/hm2和360 kg/hm2条件下,研究了不同氮素水平对玉米生长性状及产量的影响。结果表明:适量施用氮肥,可以改善玉米植株的营养生长,对生育前期玉米茎粗的影响明显大于生育后期;供氮水平与穗粒数呈显著正相关,与穗粒重呈极显著正相关,而对百粒重影响不大。提出了氮肥最佳施用量为180.33 kg/hm2,此时玉米产量为12 240.07 kg/hm2。

The effects of different nitrogen supply on the growth traits and yield of maize variety Neidan 314 were studied. The results showed that the application of reasonable amount of nitrogen could improve the vegetative growth, and had much more effect on the stem diameter in the earlier growing stage than that in the late growing stage. The nitrogen supply had significant positive correlation with grains per spike, had very significant positive correlation with grain weight per ear, and had little effect on the 100-seed weight. The yield was 12 240. 07 kg/hm2, when the best application amount of nitrogen was 180. 33 kg/hm2.