论文部分内容阅读
通过田间试验研究了杨凌红油土农田秸秆覆盖条件下冬小麦的水氮效应.结果表明,秸秆覆盖使土壤水分状况明显改善,从而使补充灌水的效果相应减小,氮肥的作用更加突出;无覆盖条件下,水氮交互效应均为负值,而秸秆覆盖时水氮有正的交互作用.旱地秸秆覆盖条件下更应重视养分的投入.无秸秆覆盖条件下小麦取得高产的基础是良好的土壤底墒和充足的氮肥.秸秆覆盖使小麦达到最高产量所需要的灌水量降低,灌水时期后延.不论有无秸秆覆盖,拔节期灌水对冬小麦籽粒产量没有显著影响.
The field experiment was conducted to study the water and nitrogen effects of winter wheat under the straw mulching of Yanglinghong oil and soil farmland.The results showed that the straw mulching significantly improved the soil water status and thus the effect of supplementary irrigation was reduced correspondingly and the nitrogen fertilizer played a more prominent role. Under the conditions, the interaction effects of water and nitrogen were negative, and the water and nitrogen had a positive interaction when straw mulching.While the straw mulching conditions in dryland should pay more attention to the input of nutrients.Without straw mulching, the basis of high yield of wheat is good soil Soil moisture and adequate nitrogen fertilizer.The irrigation amount needed by straw mulching to achieve the highest yield of wheat was reduced and the irrigation period was postponed.The irrigation at jointing stage had no significant effect on the grain yield of winter wheat with or without straw mulching.