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

摘要作物需水量的预测是进行水资源规划和管理的有效手。

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.

水灌溉条件的紫花苜蓿、料玉和青贮玉需水量进行了试验研究,分析了不同灌溉水平3草料作物的土壤水动态和需水规律。