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棉花宽膜覆盖的土壤增温效应十分显著，４～６月上旬５ｃｍ与１０ｃｍ土壤温度分别较窄膜覆盖提高２．０℃和１．８℃，对促进南疆地区棉花的早播、早出苗、多结早桃、增加产量有重要意义。宽膜覆盖的温度补偿效应，有利于棉株早发、旺长，有利于叶面积系数增加，但易造成棉田遮光荫蔽，消光系数增大，中下部蕾铃脱落严重。研究认为，南疆棉区高密度的栽培条件下，宽膜覆盖栽培的棉花叶面积系数控制在３．０～３．５左右为宜
Cotton wide film covered the soil warming effect is very significant, 4 ~ early June 5cm and 10cm soil temperature were more narrow film coverage increased 2.0 ℃ and 1.8 ℃, to promote cotton in southern Xinjiang early sowing, early emergence , Knot more early knot, increase yield is of great significance. The temperature compensation effect of wide film coverage is conducive to cotton plant early hair, Wang Long, is conducive to the increase of leaf area coefficient, but easily lead to shading cotton shade, extinction coefficient increases, the lower part of the lower part of the serious falling lace buds. According to the research, under the high-density cultivation conditions in southern cotton area, the leaf area coefficient of cotton covered by wide-film mulch is controlled at about 3.0-3.5