膜下滴灌对玉米产量和土壤含水量变化的影响

Effect of Drip Irrigation under Plastic Mulch on Maize Yield and Soil Water Content

[目的]研究膜下滴灌对玉米产量和土壤含水量变化的影响,为大田生产实践提供理论依据。[方法]以玉米品种兴农168为例,根据膜下滴灌灌水定额共设置5个处理,对应的灌水定额分别为104.0、138.0、172.0、206.0和240.0mm。通过2016、2017年连续2年田间试验,分析研究膜下滴灌不同灌水定额对玉米产量和土壤含水量的影响。[结果]各处理条件下玉米产量、耗水量均与灌水定额呈正相关,但是水分利用效率与灌水定额呈负相关。通过对比分析2016和2017年2年的玉米产量、耗水量和水分利用效率等相关数据,认为试验地区玉米膜下滴灌的最适宜灌水量为172~206mm。[结论]合理的灌水定额可以有效提高玉米产量,是提高玉米产量的关键因素。

[Objective]To study the effects of drip irrigation under film on corn yield and soil water content,and to provide theoretical basis for field production practice.[Method]Taking the corn variety Xingnong 168 as an example and according to the drip irrigation irrigation quota under the membrane, a total of 5 treatments was setted,and the corresponding irrigation quotas were 104.0, 138.0, 172.0, 206.0 and 240.0 mm respectively.Through the two-year field experiment in 2016 and 2017, the effects of different irrigation quotas under drip irrigation on maize yield and soil water content were analyzed.[Result]Maize yield and water consumption were positively correlated with irrigation quota under various treatment conditions,but water use efficiency was negatively correlated with irrigation quota.By comparing and analyzing the corn yield, water consumption and water use efficiency in 2016 and 2017, it was considered that the optimum irrigation amount of corn membrane drip irrigation in the test area was 172-206 mm.[Conclusion]Reasonable irrigation quota can effectively increase corn yield and is an important factor of corn yield.