【摘要】 【目的】研究不同作物渗灌土壤水分状况与产量效应,为渗灌推广应用提供技术参考。【方法】基于正交试验设计,以渗灌玉米产量为敏感性分析指标,研究渗灌灌溉下播种深度、渗灌埋深、灌水频次和灌水定额对玉米产量影响的敏感性,观测不同处理下土壤水分状况。【结果】渗灌与膜下滴灌土壤水分分布有所不同。渗灌耕作层土壤含水率低,中下层土壤含水率渐增;膜下滴灌耕作层土壤含水率较高,中层土壤有所下降,下层含水率增高。4 200 m~3/hm~2渗灌定额玉米产量达9 905.56 kg/hm~2。渗灌玉米平均产量9 485.10 kg/hm~2,比膜下滴灌高出12.7%。【结论】对渗灌玉米产量影响最为显著的是播种深度,其次为灌水频次、渗灌埋深,影响最小的是灌水定额。播种深度20 cm,渗灌埋深30 cm,灌水定额600 m~3/hm~2,灌水频次7次为渗灌玉米高产最优参数组合。更多还原

【Abstract】 【Objective】 Exploring the soil moisture status and yield effects of different crop subsurface drip irrigation can provide technical reference for the popularization and application of subsurface drip irrigation. 【Method】 Based on the principle of orthogonal experiment design, the experiment used infiltration irrigation corn yield as the test index to study the sensitivity of the sowing depth, depth of subsurface emitter, irrigation frequency and irrigation quota to maize yield under subsurface drip irrigation, and observe soil moisture status under different treatments.【Result】 The results show that the soil moisture distribution is different between subsurface drip and drip irrigation under film. The soil moisture content in the surface layer of subsurface drip irrigation is low and that in the middle and lower layers increases gradually. The soil moisture content of drip irrigation tillage layer under film was higher, the middle layer decreased, and the lower layer increased. Considering the high-yield and water-saving factors, the maize yield of 4,200 m~3/hm~2 irrigation quota reached 9,905.56 kg/hm~2. This scheme can save water and achieve high yield. The average yield of subsurface drip irrigation maize is 9,485.10 kg/hm~2, which is 12.7% higher than that under drip irrigation under film. 【Conclusion】 Analysis of orthogonal experiment shows that the most significant effect on the yield of subsurface drip irrigation corn is the sowing depth, followed by irrigation frequency and depth of subsurface emitter, and the least impact is irrigation quota. The sowing depth is 20 cm, the depth of subsurface emitter is 30 cm, the irrigation quota is 600 m~3/hm~2, and the irrigation frequency is 7 times, which is the optimal parameter combination for subsurface drip irrigation maize high yield.更多还原