干旱区棉花畦灌非充分灌溉技术研究——以新疆尉犁县为例

Study on Deficit Irrigation Technology for Cotton Border Irrigation in Arid Area——Taking Yuli County as an example

为了探索干旱区棉花畦灌非充分灌溉技术应用的模式,通过新疆尉犁县实验资料,对棉花产量及水分利用效率与土壤水分平衡方程各分量之间的关系进行了研究,结果表明:灌溉定额为3 000m3/hm2时,棉花苗期不进行灌溉,蕾期灌1次,花铃期灌水2次,吐絮期适当进行灌溉,可有效提高产量;灌水量的大小与灌水次数影响着棉花的生长变化及产量,适量的灌溉对于促进棉花生长具有重要意义。研究结果为指导当地农业生产提供了一定参考。

In order to explore the application mode of deficit irrigation technology for cotton border irrigation in arid area, by usingthe experimental data of cotton in Yuli county of Xinjiang, the relationships among yield, water use efficiency of cotton and compo- nents of water balance equation are studied. The results show that when the irrigation quota is 3 000 m3/hm2 , under the condition ofno irrigation at seedling stage, one time irrigation at bud stage, two times irrigation at blooming period, and appropriate irrigation at boll opening period, the production can be effectively inereased; the irrigation amount and irrigation times have obvious impact on the growth and yield of cotton. The results can provide some reference for local agricultural production.