胜利大队是辽宁省新宾县上夹河公社的一个高寒山区大队,坡地多,肥力较差,气候冷湿,无霜期只有130—135天,常年有效积温2800—2900℃,春有冷冻,秋有早霜,夏季高温持续时间较短,生育期间玉米常受延迟性低温冷害危害,因此常年单产不高不稳。近几年来,由于这个大队大搞农田基本建设,采取了一系列的技术推施,玉米产量不断提高,1977年2,450亩清种玉米,平均单产1,004斤,比1974—1975年分别提高1.5倍到2.0倍,比1976年增产35%。其中700余亩创高产1.400斤,1,500亩亩产达到1,150斤。一、适时早播秋霜春防适时早播是秋霜春防的一项增产措 Victory Brigade is an alpine mountain brigade in Shangjianhe commune, Xinbin County, Liaoning Province. It has more sloping fields, less fertility, cold and humid climate, only 130-135 days frost-free period, annual effective accumulated temperature of 2800-2900 ℃, freezing in spring and autumn Early frost, short duration of high temperature in summer, corn is often delayed by low temperature chilling injury during growth, so the perennial yield is not high and unstable. In recent years, as a result of extensive farmland construction, the brigade has adopted a series of technical measures to continuously raise the output of corn. In 2,450 mu of cleared maize in 1977, the average yield was 1,004 jin, 1.5 times more than in 1974-1975 2.0 times, an increase of 35% over 1976. Among them, more than 700 mu of high-yield 1.400 kg, 1,500 mu of mu produce reached 1,150 pounds. First, a timely manner early autumn autumn frost spring timely sowing is a spring frost spring a measure of stimulation