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1986年开始,湖南省连续三年组织山区玉米覆膜丰产栽培试验示范,获得了显著的增产效果。1986年在龙山、慈利进行小面积玉米覆膜栽培试验,平均亩产分别达到538.6公斤和482.7公斤,比露地栽培玉米每市增产190.6公斤和84.7公斤。1987年扩大列11个县试验示范,面积增加到1.76万亩,在严重自然灾害情况下,仍然获得亩产288.1公斤的好收成,比露地栽培的玉米每亩增产
Since 1986, Hunan Province has organized demonstration experiments on high-yield cultivation of maize mulch in mountainous areas for three consecutive years and obtained remarkable yield-increasing effects. In 1986, Longshan and Cili conducted a small-area corn-covered cultivation experiment, with an average yield of 538.6 kilograms and 482.7 kilograms per mu respectively, an increase of 190.6 kilograms and 84.7 kilograms per kilogram of open-field corn cultivation. In 1987, 11 pilot counties were expanded to cover an area of 17,600 mu. In the case of severe natural disasters, a good yield of 288.1 kg per mu was still obtained, a yield per mu was higher than that of cultivated corn in the open field