论文部分内容阅读
节能日光温室性能及蔬菜年产值测定杜元，刘金郎，徐风翔７４５０００甘肃省庆阳师专生物系西峰市地处陇东黄土高原之董志塬上，海拔１４００米左右，属亚热带大陆性季风气候。冬季寒冷而干旱，日照时间长；夏季多雨而短促，我们依据这样的气候特征，于１９８７年自行设计...
Energy-saving sunlight greenhouse performance and vegetable annual production value determination DU Yuan, LIU Jin-lang, XU Feng-xiang 745000 Qingyang Teachers College, Gansu Department of Biology Xifeng is located in Dongzhi Plateau of Longdong East Plateau, elevation 1400 meters, is a subtropical monsoon climate. Cold and dry in winter, long sunshine; rainy summer and short, we based on such a climatic feature, designed in 1987 ...