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经３年试验表明，冬季覆盖棉花播前两米土体贮水量比露地增加３７．２ｍｍ，相当于每公顷灌底水３７５．０ｍ３；春季覆盖两米土体贮水比露地增加２４．５ｍｍ，相当于灌水２４７．５ｍ３。冬、春覆盖其水分效应可以持续到盛花期，对棉花早发早育、缓解伏旱、提高成铃率、增加产量有一定促进作用。尽覆盖、春覆盖比常规播时覆盖分别增产２４．６％和２０．３％，比露地分别增产６６．５％和６０．６％。
After three years of experiments show that winter cotton cover two meters before sowing the soil water storage capacity increased by 37.2mm than the open, equivalent to 375.0m3 per hectare drench water; spring covers two meters of soil water storage than the open 24.5mm, Equivalent to irrigation 247.5m3. Winter and spring cover its water effect can be continued until the flowering stage, early cotton early and early education, ease the summer drought, increase the rate of bolls and increase production have a certain role in promoting. In terms of coverage, spring coverage increased 24.6% and 20.3% respectively over the conventional broadcast coverage, 66.5% and 60.6% respectively higher than the open coverage.