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通过对景电二期灌区衬膜沙地土壤水分动态监测，分析其土壤水分剖面变化及土壤水分动态变化规律，得出沙地衬膜能显著起到节水保墒作用，且随衬膜深度的增加而提高。在作物牛长初期，村膜沙地土壤水分在垂直分布差异上不明显，这是由于幼苗阶段、小麦植株矮小，植物蒸腾耗水员较小的缘故；而在植物生长中后期，小麦地上部分牛长旺盛，根系庞大，蒸腾耗水最大，从而造成土壤含水最上层高于下层。衬膜沙地因土层变浅，限制了土壤的储水深度，因此，在衬膜沙地栽培作物时，需要通过农田水分调控技术来实现水源的合理利用，其技术原则是：a少量多灌，并严格按照小麦各牛育期需水量的多少决定灌溉量；b应以当地资源条件和农m水分状况为依据，建众适宜的作物种植方式、耕作体系和轮作制度；c通过培肥地力调节农田水分关系．提高作物光合作用强度和水分利用率．以调节土壤的持久供水能力。
Through the dynamic monitoring of the soil moisture of the lining film sandy land in the second phase of Jingdian, the change of soil water profile and the dynamic variation of soil moisture were analyzed. It was concluded that the sand lining film could play a significant role in saving water and soil moisture, Increase and increase. In the early stage of crop cow length, the difference of vertical distribution of soil moisture in the village film sand was not obvious, which is due to the small seedling stage and small plant transpirationers in the seedling stage. However, in the middle and later stages of plant growth, Cow long exuberant, large roots, transpiration, water consumption, resulting in the highest soil moisture above the lower level. The lining of the sand due to shallow soil, limiting the depth of soil water storage, therefore, in the lining film sand cultivation of crops, the need to regulate the use of farmland water to achieve rational use of water sources, the technical principles are: a small amount of more Irrigation should be decided strictly according to the amount of water required by each cow during its breeding period. B The appropriate crop planting system, cropping system and crop rotation system should be established based on the local resource conditions and the status of the agricultural m. C. Farmland water relations. Improve crop photosynthesis intensity and water use efficiency. To adjust the soil’s long-term water supply capacity.