摘要
为获得冬小麦灌水量和施氮量的最佳组合,在粉砂壤中进行了水氮交互效应对冬小麦生长、产量及土壤中硝化氮分布的影响的试验。试验中灌水量取低、中、高3个水平,分别是维持土壤含水率下限为田间持水量的45%,55%,65%,施氮量的3个水平为154.5,206.5,258.5 kghm^2。试验结果表明,在试验区特定气候、土壤条件下,中水平灌水和施氮的组合处理效果最佳,低水平灌水和施氮的组合处理效果最差。
In order to obtain an optimum combination of irrigation and N applica- tion for winter wheat,a field investigation is carried out on the coarse loam sand soil during 1992-1993.The treatments include all combinations of three irrigation levels based on keeping lowest soil moisture being 45%,55%,65% of field capacity (FC)and three rates of N being 154.5,206.5 and 258.5 kghm^(-2).The results show that the optimum combination is moderate N application rate and moderate irriga- tion level(206.5 kghm^(-2)and 55% of FC)and the worst combination is low irriga- tion level and low N rate under the experimental conditions of climate and soil.
关键词
水氮交互作用
施氮量
硝态氮分布
冬小麦
产量
interaction of water and nitrogen
soil moisture
N application rate
NO_3-N distribution
