本刊1985年第1期所刊登的“塑料大棚地下热交换系统”技术,在寒冷的长春市郊初露头角。由吉林工业大学农机教研室的谢毓琦等同志在长春郊区对该系统进行试验测定表明,春天可提前喜温作物的定植期10～15天,比对照棚增产36%,增收40%。秋天,可延后黄瓜 The first issue in 1985 published “plastic greenhouse underground heat exchange system ” technology, in the cold outskirts of Changchun outcrop. By the Jilin Agricultural University, Xie Yuqi Department of Agricultural Mechanization, and other comrades in Changchun suburbs of the system test showed that the spring ahead of the thermophilic crop planting 10 to 15 days, 36% more yield than the control studio, an increase of 40%. Autumn, delayed cucumber