通常把温室内的热量来源(包括夜间)主要都靠太阳辐射的温室叫做日光温室,或者不加温温室。塑料薄膜日光温室由于密封性强,冬季采光、保温性能好,适于我国北方地区冬季和早春生产。特别是近年来,通过优化温室结构,加强覆盖保温措施,选用耐低温,耐弱光的蔬菜品种,覆盖长寿无滴膜,应用聚醋镀铝膜作为反光幕,大量增施优质有机肥等配套技术,有力地推动了日光温室的发展。目前,在辽宁海城、瓦房店,山东寿光,宁夏银川等地,塑料薄膜日光温室的面积很大,例如海城市就有15 000多亩。塑料薄膜日光温室之所以能够不加温在冬季生产新鲜蔬菜,是因为它与传统的加温温室相比,主要是靠合理的采光、保温措施来实现的。这些措施主要有:1、加厚了温室墙体与后屋面或在墙外堆集相当于当地最大冻土层的防寒土。温室后墙、后屋面具有 Greenhouses, which mainly rely on solar radiation, usually called solar greenhouse, or do not heat greenhouse, usually include sources of heat in the greenhouse (including at night). Plastic film solar greenhouse as a result of strong sealing, winter lighting, thermal insulation performance, suitable for winter and early spring production in northern China. Especially in recent years, by optimizing the greenhouse structure, strengthening the coverage of insulation measures, the selection of low temperature resistant, weak light resistant vegetable varieties, covering longevity drip film, the use of aluminum-plated polyester film as a reflective screen, a large number of additional high-quality organic fertilizer and other ancillary Technology, effectively promoted the development of solar greenhouse. At present, plastic hats have a large area of ​​solar greenhouse in Haicheng, Wafangdian, Shouguang, Shandong, and Yinchuan in Ningxia. For example, there are 15,000 mu in Haicheng City. Plastic film solar greenhouse has been able to produce fresh vegetables in winter without heating, because it is compared with the traditional heating greenhouse, mainly by reasonable lighting, insulation measures to achieve. These measures are: 1, thickened the greenhouse walls and the rear roof or outside the wall to accumulate the equivalent of the local maximum permafrost frozen layer. Greenhouses rear wall with rear roofing