用土壤的农业水文学特征 ,如土壤质地、土壤容量、最低田间含水量和萎蔫下的土壤含水量对作物灌溉的规范化进行了研究。结果发现 ,如果考虑作物的灌溉制度 ,由有效贮水量决定的土层中的灌溉前含水量为一常数 ,即在有效植物生长期之前 ,土层中的灌溉前含水量为 50 % ,而有有效植物生长期则为 70 %。土层有效贮水量为决定不同土壤灌溉前含水量的一个概略性指标 The standardization of crop irrigation has been studied using agro-hydrological characteristics of soil, such as soil texture, soil volume, minimum field moisture, and soil moisture under wilting. As a result, it was found that the water content before irrigation in the soil layer determined by the effective water storage is a constant if the crop irrigation system is taken into account, that is, before the effective plant growth period, the water content before irrigation in the soil layer is 50% Effective plant growth was 70%. Effective soil water storage capacity is a rough indicator of water content before irrigation