辽宁省位于东北地区的南部,东经118°53’—125°46’,北纬38°43’—43°26’之间,冬季寒冷,但光照条件较好,11月至翌年3月阴天很少,适于温室生产。特别是北纬41°以南地区,发展保护地蔬菜生产有很大优势,不少城镇远郊利用农副产物作为防寒保温材料,修建日光温室,冬季生产叶菜 Liaoning Province is located in the south of the northeast region, longitude 118 ° 53’-125 ° 46 ’east longitude and latitude 38 ° 43’-43 ° 26’ between the winter cold, but the light conditions are good, November to March the following year cloudy Less, suitable for greenhouse production. Especially in the area south of latitude 41 ° south, it is of great advantage to develop vegetable production in protected areas. Many urban and suburban areas use agricultural and sideline products as cold-proof insulation materials, construct solar greenhouse, and produce leafy vegetables in winter