有限供水条件下确定玉米灌水时间方法的研究

Study on Method of Determining Irrigation Time of Maize under Condition of Limited Water Supply

摘要: 合理确定灌水时间是提高有限灌溉供水量利用效率的重要措施。本研究确定灌水时间的方法简称为K-M法与经验灌水法进行比较，结果表明：冬小麦复播玉米10年产量与效益的模拟结果表明，K-M法增产、增收效果具有波动性；总体上来看，灌水一次时，增产、增收效果不明显，二–四次灌水具有明显的增产、增收效果，平均增产0.21%~10.08%，平均增效1.95%~20.01%。夏玉米10年平均增产0.72%。K-M法具有一定的增产、增收效果。

Abstract: The reasonable determination of the irrigation time is an important measure to improve the uti-lization efficiency of the limited irrigation water supply. The method of determining the irrigation time in this paper is abbreviated as K-M method and compared with the empirical irrigation method. The results show that the simulation results of the yield and benefit of the winter wheat and the maize in 10 years show that the effect of the increasing production and income by K-M method is fluctuating. On the whole, the effect of the increasing production and income is not obvious when irrigation once. Two to four times of the irrigation has obvious effect on the increasing production and income. The average yield increase is 0.21%~10.08%, and the average efficiency increase is 1.95%~20.01%.The average yield of the summer corn increased by 0.72% in 10 years. K-M method has a certain effect of the increasing production and income.