Crop oater requirement forcasting is the effective way to plan and manage the water resources.

摘需水量的预测是进行水资源规划和管理的有效手段。

The paper analyzes the soil water dynamics and water requirement law of alfalfa,feed maize and ensile maize under 3 kinds of water-saving irrigation conditions through experimental study on the crops.

对节水灌溉条件下的紫花苜蓿、饲料玉和青贮玉需水量进行了试验研究,析了不同灌溉水平下3种饲草料的土壤水动态和需水规律。