论文部分内容阅读
田间渗水能力,指土壤接纳和渗入雨水或者灌溉水的能力,即最大程度地吸纳降雨和灌溉水,减少地表径流和土壤渗漏的能力。土壤对作物生长的支持能力就是土壤肥力,其中就包括田间渗水能力和持水力,由于作物营养元素都是在溶解的离子态时被根系吸收利用的,适宜的土壤水含量是作物营养元素(包括氮素)有效利用的保障。土壤含水量直接影响土壤溶液的浓度和运动,也影响到土壤固相、液相和气相三者之间的比例。
Field water seepage capacity refers to the ability of the soil to receive and infiltrate storm water or irrigation water, ie, to maximize rainfall and irrigation water, reduce surface runoff and soil seepage. Soil support for crop growth is soil fertility, including field seepage capacity and water holding capacity, as the crop nutrients are absorbed by the roots in dissolved ionic forms, and suitable soil water content is the nutrient element of the crop (including Nitrogen) effective use of protection. Soil moisture content directly affects the concentration and movement of soil solution, but also affects the ratio of soil solid phase, liquid phase and gas phase.