使用塑料薄膜覆盖，可以防止跑墒。
Plastic sheeting is used to cover the soil to prevent loss of moisture.
塑料薄膜覆盖提高苗床的土壤温度，促进作物较快发育并提早成熟。
Plastic mulch increases soil temperature in the bed which promotes faster crop development and earlier yields.
在美国，虽然塑料薄膜覆盖主要用于蔬菜生产，但对任何可以获得效益的作物都可行。
Although mulch is used primarily for vegetable production in the United States, it is a viable concept for any crop where profitability can be demonstrated.
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