玉米的涝害及其防御措施的研究——Ⅲ.氮肥用量对减轻涝害的作用

Studies of Waterlogging Effect on Corn and Its Protective Measures Ⅲ.Effects of Nitrogen Amount on Alleviation of Waterlogging

进行了两年的田间试验,以确定土壤肥力及追施N肥量对减轻夏玉米涝害的作用.试验结果指出,淹水5天后玉米幼苗生长非常缓慢,但提高土壤肥力和追施N肥对恢复受涝幼苗生长有明显的作用.同不施N肥小区相比,淹水后每亩追施15和30公斤硫酸铵在中肥地上增产13.8%和22.8%,在高肥地上增产9.3%和11.2%.但两种地力水平之间产量差异不显著.

Two years' field experiments were carried out to determine the effects of soil fertility and sidedressed N amount on the alliviation of waterlogging effects on summer corn.Results indicated that corn seedlings grew much slowly after 5 days' flooding, but higher soil fertility and dressing of N fertilizers exerted considerable effects on the recovery of the flooded seedlings.As compared with the non-nitrogen fertilized plots, dressing with 15 and 30 kg (NH4)2SO4 per mu after flooding increased grain yield by 13.8% and 22.8% in medium-fertility plots, and by 9.3% and 11.2% in fertile plots. But there was no significant difference between the two soil fertility levels.