通过大田试验,在灌溉量2700m3/hm2、3600m3/hm2、4500m3/hm2条件下,对粮饲兼用玉米根系分布特征及产量影响进行了研究。结果表明:1)3600m3/hm2的灌溉量在0～40cm土层的土壤含水率较充分灌溉显著提高4.78%～19.3%;2)各灌溉条件下,根系随生育进程不断向下发展,随灌溉量的减少,根系有向深层发展的趋势;3)3600m3/hm2的灌溉条件下,粮饲兼用玉米籽粒产量较充分灌溉显著提高11.3%;4)秸秆产量在充分灌溉条件下较高,尤其在抽雄至乳熟期达到最高。 Field experiments were conducted to study the root distribution characteristics and yield of corn for both grain and grain, under irrigation conditions of 2700m3 / hm2, 3600m3 / hm2 and 4500m3 / hm2. The results showed that: 1) The soil water content of 3600m3 / hm2 irrigation in 0 ~ 40cm soil layer increased 4.78% ~ 19.3% than that of sufficient irrigation; 2) Under irrigation condition, 3) 3600m3 / hm2 of irrigation conditions, grain and forage corn grain yield increased significantly than the full irrigation significantly increased 11.3%; 4) straw yield under full irrigation conditions, especially in the Tasseled to milky millet reached the highest.