膜下滴灌灌溉制度对土壤水盐空间分布及玉米产量的影响
灌溉制度对土壤水盐分布具有密切的关系，土壤水盐的分布又直接影响着作物产量。为了正确合理配置和利用水资源，改善试验区生态环境，减小肇州地区土壤含盐量对玉米产量造成的危害，选择肇州县水利科学试验站作为试验地。试验结合膜下滴灌，设置4个水平的灌溉定额（200m3/hm2、300m3/hm2、400m3/hm2和500m3/hm2），灌水次数分别为2次、3次和4次，测定并分析不同土层深度处土壤含水率、土壤可溶性盐浓度、玉米产量的变化。结果表明，灌溉定额为400m3/hm2，灌水次数为4次时，玉米产量达到最大，且根系部位抑盐效果较好，是较为经济合理的灌溉制度。研究结果可为肇州地区制定合理的灌溉制度，改善土壤含盐量及提高作物产量提供理论参考。
英文摘要:
The irrigation system has a close relationship with the distribution of soil water and salt, and the distribution of soil water and salt directly affects the crop yield. In order to correctly and rationally deploy and utilize water resources, improve the ecological environment of experimental area and reduce the harm of soil salinity to maize yield in Zhaozhou area, Zhaozhou water conservancy scientific research station was chosen as the test site. Tested with drip irrigation, the irrigation quota set 4 levels (200 m3/hm2, 300 m3/hm2, 400 m3/hm2 and 500 m3/hm2), irrigation times were 2 times, 3 times and 4 times, determination and analysis of different depth of soil moisture, soil soluble salt concentration, corn yield change. The results showed that when the irrigation quota was 400 m3/hm2 and irrigation times were 4 times, the yield of maize reached the maximum, and the effect of salt inhibition on root parts was better, which was a more economical and reasonable irrigation system. The research results can provide a theoretical reference for establishing reasonable irrigation system, improving soil salt content and increasing crop yield in Zhaozhou area.
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