农用薄膜是应用于农业生产的塑料薄膜的(de)(de)总称，对(dui)于(yu)播(bo)种(zhong)(zhong)时期的(de)(de)保湿、保温起非(fei)常重(zhong)要的(de)(de)作用(yong)(yong)(yong)。随着科学(xue)技(ji)术的(de)(de)进步，对(dui)农(nong)(nong)用(yong)(yong)(yong)薄(bo)膜(mo)(mo)(mo)的(de)(de)要求越来越高(gao)，各种(zhong)(zhong)新型(xing)薄(bo)膜(mo)(mo)(mo)不(bu)断出现，现介绍几种(zhong)(zhong)先进的(de)(de)农(nong)(nong)用(yong)(yong)(yong)薄(bo)膜(mo)(mo)(mo)。这种(zhong)(zhong)薄(bo)膜(mo)(mo)(mo)厚度只有普通(tong)薄(bo)膜(mo)(mo)(mo)的(de)(de)一(yi)半(ban)，因(yin)此重(zhong)量减轻(qing)一(yi)半(ban)，相应的(de)(de)使(shi)用(yong)(yong)(yong)成(cheng)本也降低一(yi)半(ban)。它的(de)(de)透光度和保温性也优(you)于(yu)普通(tong)薄(bo)膜(mo)(mo)(mo)，每吨(dun)可覆(fu)盖(gai)耕地436亩，为(wei)普通(tong)农(nong)(nong)膜(mo)(mo)(mo)的(de)(de)2倍；此种(zhong)(zhong)薄(bo)膜(mo)(mo)(mo)除(chu)(chu)用(yong)(yong)(yong)做(zuo)水稻、棉花、玉米、烤(kao)烟、花卉的(de)(de)育(yu)苗和大(da)田覆(fu)盖(gai)外，还(hai)利用(yong)(yong)(yong)它做(zuo)防洪膜(mo)(mo)(mo)，为(wei)灌渠和贮水池做(zuo)内衬，大(da)大(da)提高(gao)水的(de)(de)利用(yong)(yong)(yong)系(xi)数。除(chu)(chu)此以外，农(nong)(nong)膜(mo)(mo)(mo)还(hai)广泛应用(yong)(yong)(yong)于(yu)食用(yong)(yong)(yong)菌栽(zai)培、贮藏青饲料(liao)等；为(wei)使(shi)薄(bo)膜(mo)(mo)(mo)耐老(lao)化(hua)、易回收，在(zai)生产过程中加入防老(lao)化(hua)剂，可使(shi)薄(bo)膜(mo)(mo)(mo)的(de)(de)寿命延长2~4倍。地膜(mo)(mo)(mo)在(zai)揭膜(mo)(mo)(mo)后仍有一(yi)定(ding)强(qiang)度，回收后仍可使(shi)用(yong)(yong)(yong)，既降低成(cheng)本、又减少(shao)田间的(de)(de)残(can)膜(mo)(mo)(mo)量。