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探明耕作方式和亏缺灌溉对麦后移栽棉产量和水分利用的效应,对于建立麦后移栽棉的适宜耕作方式及灌溉制度十分重要.在大田条件下设置了翻耕和免耕2种耕作方式(灌水定额均为45mm)及相应减小50%灌水定额的亏缺灌溉,分析了不同耕作方式和亏缺灌溉对棉花耗水规律、籽棉产量、水分利用效率和纤维品质的影响.结果表明:与翻耕相比,免耕减少了棉田20.3%的棵间土壤蒸发;不论何种耕作方式,亏缺灌溉在不影响棉花产量和纤维品质的同时,有效降低了耗水量,提高了水分利用效率.在喷灌条件下,灌水定额为22.5mm的免耕耕作方式,不仅可有效降低麦后移栽棉田间无效棵间土壤蒸发,还可实现节水、优质、高产的有效统一.
The effect of proven tillage and deficit irrigation on transplanting cotton yield and water use efficiency after transplanting wheat is very important for the establishment of suitable tillage and irrigation system for transplanting wheat after transplanting wheat.Transplanting and no-tillage 2 The effects of different tillage methods and deficit irrigation on cotton water consumption, seed cotton yield, water use efficiency and fiber quality were analyzed. The results showed that compared with tillage, no-tillage reduced 20.3% of soil evaporation in cotton field. Irrigation did not affect cotton yield and fiber quality at any tillage, but also reduced water consumption and increased Water use efficiency Under the condition of sprinkling irrigation, the no-tillage cultivation method with the irrigation quota of 22.5mm can not only effectively reduce the evaporation of invalid soil between transplanting cotton fields after wheat transplanting, but also realize the effective unification of water saving, high quality and high yield.