农用薄膜是应用于农业生产的塑料薄膜的(de)(de)总(zong)称(cheng)，对于播种时(shi)期的(de)(de)保湿、保温(wen)起非常重(zhong)要(yao)的(de)(de)作用(yong)(yong)(yong)(yong)。随着(zhe)科学技术的(de)(de)进步，对农(nong)用(yong)(yong)(yong)(yong)薄(bo)(bo)(bo)膜(mo)(mo)(mo)的(de)(de)要(yao)求越来越高，各种新(xin)型(xing)薄(bo)(bo)(bo)膜(mo)(mo)(mo)不断出现，现介绍几(ji)种先进的(de)(de)农(nong)用(yong)(yong)(yong)(yong)薄(bo)(bo)(bo)膜(mo)(mo)(mo)。这种薄(bo)(bo)(bo)膜(mo)(mo)(mo)厚度(du)只有(you)(you)普(pu)通(tong)(tong)(tong)薄(bo)(bo)(bo)膜(mo)(mo)(mo)的(de)(de)一(yi)(yi)半(ban)，因此(ci)重(zhong)量减(jian)轻一(yi)(yi)半(ban)，相应的(de)(de)使用(yong)(yong)(yong)(yong)成本也降(jiang)低一(yi)(yi)半(ban)。它的(de)(de)透光度(du)和(he)保温(wen)性也优于普(pu)通(tong)(tong)(tong)薄(bo)(bo)(bo)膜(mo)(mo)(mo)，每吨可覆盖(gai)耕地436亩，为(wei)(wei)普(pu)通(tong)(tong)(tong)农(nong)膜(mo)(mo)(mo)的(de)(de)2倍；此(ci)种薄(bo)(bo)(bo)膜(mo)(mo)(mo)除用(yong)(yong)(yong)(yong)做(zuo)水(shui)稻、棉花(hua)(hua)、玉米、烤烟(yan)、花(hua)(hua)卉的(de)(de)育苗和(he)大(da)田覆盖(gai)外，还利用(yong)(yong)(yong)(yong)它做(zuo)防洪膜(mo)(mo)(mo)，为(wei)(wei)灌渠和(he)贮(zhu)水(shui)池做(zuo)内衬(chen)，大(da)大(da)提高水(shui)的(de)(de)利用(yong)(yong)(yong)(yong)系数。除此(ci)以外，农(nong)膜(mo)(mo)(mo)还广泛应用(yong)(yong)(yong)(yong)于食(shi)用(yong)(yong)(yong)(yong)菌栽培、贮(zhu)藏青(qing)饲料等；为(wei)(wei)使薄(bo)(bo)(bo)膜(mo)(mo)(mo)耐老化、易回收，在(zai)生产过(guo)程中加入防老化剂，可使薄(bo)(bo)(bo)膜(mo)(mo)(mo)的(de)(de)寿(shou)命延长2~4倍。地膜(mo)(mo)(mo)在(zai)揭(jie)膜(mo)(mo)(mo)后仍(reng)有(you)(you)一(yi)(yi)定(ding)强度(du)，回收后仍(reng)可使用(yong)(yong)(yong)(yong)，既降(jiang)低成本、又减(jian)少田间的(de)(de)残(can)膜(mo)(mo)(mo)量。