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试验于2009～2010年在内蒙古河套灌区进行,设行上覆膜、行间覆膜和不覆膜(CK)3个处理,分析河套灌区盐渍化土壤覆膜对春玉米土壤水分运移及利用的影响,挖掘春玉米农艺节水机制。结果表明,行间覆膜显著减少土壤供水消耗,提高灌水利用率和降水利用率,总耗水量降低。行间覆膜通过改变春玉米阶段耗水量、日耗水量和耗水模系数,达到各时期土壤水分最适比例;行间覆膜处理水分利用效率较对照分别提高了20.05%和57.13%;覆膜能很好地抑制土壤返盐,行间覆膜处理0-80 cm土层可溶性盐分降低了1.30 g/kg,可有效预防土壤板结,显著提高灌水效率和灌水均匀度。
The experiment was carried out in Hetao Irrigation District of Inner Mongolia from 2009 to 2010. Three treatments of overlying film, intercropping film and non-film covering (CK) were conducted to analyze the effect of salinized soil film mulching on soil water transport, Utilize the impact, tap the spring corn agronomy water-saving mechanism. The results showed that the interplanting film significantly reduced soil water consumption, increased irrigation efficiency and precipitation utilization rate, and decreased total water consumption. The results showed that the interplanting film could reach the optimum proportion of soil moisture by changing the water consumption, daily water consumption and water consumption modulus in spring maize stage. The water use efficiency of the interplanting film treatments increased by 20.05% and 57.13% respectively compared with the control The film can restrain the return of salt to the soil well. The soluble salt content in 0-80 cm layer decreased by 1.30 g / kg, which can effectively prevent soil compaction and significantly improve irrigation efficiency and irrigation uniformity.