在大田和盆栽条件下，经过两年试验。对玉米田间耗水量和生理耗水量进行了测定。结果表明，玉米田间耗水量在０～４９０ｍｍ之间．生理耗水量在３９０～４００ｍｍ之间，而且均以拔节～乳熟期耗水量最多；与高粱、谷子相比，玉米幼苗离体失水率低于高粱、谷子，因此，有理由认为玉米在苗期比高粱、谷子更抗旱。 In the field and pot conditions, after two years of testing. The field water consumption and physiological water consumption were measured. The results showed that the corn field water consumption was between 0 ~ 490mm. Physiological water consumption was between 390 and 400 mm, and the water consumption was the highest in jointing and milking stages. Compared with sorghum and millet, the exudation loss rate of maize seedlings was lower than that of sorghum and millet. Therefore, More than sorghum, millet more drought.