秋灌定额对越冬期土壤水盐运移分布的影响

Effect of Autumn Irrigation on Soil Water and Salt Transfer for Freezing and Thawing Period

通过盐渍化冻融土壤秋灌试验,研究了不同秋灌定额下越冬期间土壤含水率、盐分的变化情况。结果表明,秋灌定额为150～200 mm时,春播期土壤含水率基本适宜。秋灌定额对土壤盐分的动态影响较大,秋灌能够起到冲洗压盐的作用。但是秋灌定额不宜过大,秋灌前不实施耕作措施更有利于储水保墒。

Based on the autumn irrigation experiment on saline soil,the change of soil water and salt under different autumn irrigation requirements were studied.The results showed： when autumn irrigation requirement is from 150 mm to 200 mm,soil water is suitable to spring planting.Autumn irrigation can play role on the leaching salt.However the requirement is generally not too large.The soil water on untilled land is larger that on ploughed land.Before autumn irrigating,not to plough is more helpful to water storage and moisture conservation.