赤峰市玉米地膜栽培技术1984年引进试验,1986年玉米地膜覆盖282亩,平均亩产744.5公斤,比露地对照田491.6公斤、每亩增产253公斤,每亩纯增收68元。1987年玉米地膜覆盖30765亩,平均单产722.6公斤,比露地对照田448.6公斤、每亩增产274公斤,每亩纯增收65.31元。1988年玉米地膜覆盖24039亩,平均单产727.3公斤,比露地对照 Chifeng corn film cultivation technology introduced test in 1984, 1986 corn covering 282 acres of mulch, the average yield 744.5 kilograms, more than the open field control 491.6 kilograms, yield 253 kilograms per mu, net income per mu 68 yuan. In 1987, the mulching of corn covers 30,765 mu, with an average yield of 722.6 kilograms, 448.6 kilograms more than that of the open field and an increase of 274 kilograms per mu. The net income per mu is only 65.31 yuan. 1988 covers 24039 acres of plastic mulching, the average yield of 727.3 kilograms, compared with the open field