论文部分内容阅读
为建立赤峰地区膜下滴灌玉米灌溉制度,指导农业生产,通过连续两年的田间试验,研究不同灌水定额对玉米产量的影响,分析了不同灌水定额的土壤水分动态变化规律,进而讨论了在不同灌水定额条件下玉米的产量、总耗水量、以及水分利用效率的差异。结果表明:膜下滴灌条件下玉米土壤水分运移变化多在60cm土层以上,尤其以0~20cm土层变化最为明显。膜下滴灌玉米产量和全生育期耗水量与灌水定额大小成正比,随灌水量的增加而增加,水分利用效率与之相反。综合连续两年的产量、耗水量及水分利用效率对比分析,认为赤峰地区膜下滴灌玉米的灌水量为150~180mm是较为适宜的,为指导赤峰地区玉米膜下滴灌合理灌溉及增产节水提供理论依据。
In order to establish the irrigation system of drip irrigation under mallow in Chifeng region and guide the agricultural production, the effects of different irrigation quotas on the yield of maize were studied through two years of field experiments. The dynamic changes of soil moisture under different irrigation quotas were analyzed, Maize yield, total water consumption, and water use efficiency differences under irrigation quotas. The results showed that the changes of soil moisture in maize under drip irrigation were mostly above 60cm soil layer, especially in 0-20cm soil layer. The yield of maize under drip irrigation and the water consumption during the whole growth period were proportional to the size of irrigation quota, and increased with the increase of irrigation water, and the water use efficiency was the opposite. Based on a comparative analysis of yield, water consumption and water use efficiency for two consecutive years, it is considered that it is appropriate to irrigate maize under film drip irrigation of 150 ~ 180mm in Chifeng region, which is suitable for guiding the reasonable drip irrigation and water saving of drip irrigation under maize in Chifeng region Theoretical basis.