合理的目光温室结构是蔬菜创高产、高效益的基础。新乡市早在1987年就引进了河北省永年县的“永年式”日光温室，并对其后坡、后墙、室内利用率等结构作了改进，1989年冬和1990年冬出现了连续40d（天）的低温阴雪天气，很多日光温室蔬菜产量、产值下降，有的几乎绝收。针对这种 A reasonable glance of the greenhouse structure is a high yield of vegetables, high efficiency basis. As early as 1987, Xinxiang City introduced the “Yongnian” solar greenhouse in Yongnian County, Hebei Province, and improved the structure of its rear slope, back wall and indoor utilization rate. In the winter of 1989 and the winter of 1990, there appeared continuous 40d (Days) of low temperature snow and snowy weather, a lot of solar greenhouse vegetable output, output decline, and some almost absolutely. For this