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地处世界屋脊的拉萨市因海拔3658米,气候寒冷又干旱,历来的瓜果、蔬菜露地生产受到极大限制,蔬菜品种少,产量低,价格高,影响人民生活。可是拉萨日照充足,地下水丰富,年温差小、日温差大、地面温差更大,冬无严寒夏无酷暑,这些自然气候都适宜发展太阳能温室和塑料大棚。实践证明,在拉萨市,只要阳光能照射到的土地,采取保温、防寒、防风和浇水施肥、通风换气等措施,都可生产出蔬菜来。七一农场、八一农场集中搞大棚和大温室,已生产出蔬菜,每个农家也可以因地制宜地搞,只是规模大小不同而已。利用房前屋后、窗下、墙根的土地,搭起塑料棚均可生产出蔬菜。根据本人实践体会,在拉萨进行大棚蔬菜生产应注意棚内作物的布局和保温问题。
Lhasa, located on the roof of the world, is 3658 meters above sea level. Due to the cold and arid climate, the production of vegetables and fruits has long been severely restricted. There are few varieties of vegetables, low yields and high prices, affecting people’s lives. However, there is ample sunshine in Lhasa, abundant groundwater, small annual temperature difference, large daily temperature difference, greater temperature difference on the ground and no cold or hot summer in summer. These natural climates are suitable for the development of solar greenhouses and plastic greenhouses. Practice has proved that in Lhasa, as long as the sun can shine on the land, take insulation, cold, wind and water fertilization, ventilation and other measures, can produce vegetables. Seven one farms, Bayi farms concentrated engage in greenhouses and large greenhouse, has produced vegetables, each farm can also engage in local conditions, but the size of different sizes. Use the front house, the window, the wall of the ground, put up plastic shed can produce vegetables. According to my own experience, greenhouse vegetable production in Lhasa should pay attention to shed the layout and insulation of crops.