海子水库灌区节水型灌溉制度的制定

Design of Water-Saving Irrigation Scheduling in Haizi Reservoir

本文介绍了中日双方专家团在海子水库灌区现场调查中,实测土壤水分特征值的方法,土壤水分曲线的制定和应用,负压计观测值的应用,计算节水型灌溉用水量和灌水间隔日数的方法,并用节水型频繁灌溉法制定了各作物的节水型灌溉制度,用这种方法制定的节水型灌溉制度要比我国过去用的常规法节水40%以上。

This paper presents, as a result of investigation conducted in Haizi Reservoir Irrigation Area by Chinese and Japanese experts, the method of measuring the characteristic value of soil moisture; the drawing up of soil moisture curve and its application; the application of tensiometer observation value; the method of calculating water-saving irrigation quota and intermittent days between two irrigations. The water-saving irrigation scheduling is worked out for various crops. This water-saving irrigation scheduling can save water by over 40% compared with the traditional irrigation scheduling.