寒地黑土区喷灌条件下玉米生长和耗水量试验研究

Study on irrigation schedule and of maize under sprinkling irrigation in cold area

为了明确寒地喷灌条件下玉米生长和耗水情况,通过测坑开展试验研究。结果表明:玉米苗期到拔节期内适当灌水会加速叶片的生长,增加叶片面积;不同生育期增大灌水量对玉米株高影响并不显著;在玉米拔节期高水处理生育期内总耗水量最小;拔节期和抽穗期加大灌水量会有效提高玉米产量;灌浆期增加灌水量玉米秃尖长减小,百粒重减小,但对提高玉米产量影响不大。

In order to clarify the growth and water consumption of maize under the condition of sprinkling irrigation in cold area,the experiment was conducted by test-pit.The results showed that proper increase of water during seedling stage to jointing stage accelerated the growth of leaves and increased the leaf area.The effect of increasing irrigation amount on the plant height of maize in different growth stages was not obvious.The total water consumption during the growth period is the smallest by water high treatment during the jointing period.Irrigation at jointing stage and heading stage can effectively increase maize yield.The length of maize barren ear tip was decreased and the weight of 100 grains decreased during the filling stage,but it had little effect on the yield.