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我场位于拉萨市东郊,距市区约3公里,海拔高3,660米,具有高原气候的明显特点。几年来,对针叶树种进行了育苗试验,但都未成功。为了给市区提供常绿树种,1978年,我们总结了过去的经验教训,选用了油松(Pinustabulaeformis Carr)、高山松等进行了育苗试验,并作了调查。初步认为,油松是高海拔、半干旱地区较适宜的常绿树种,可扩大育苗。现将引种育苗效果初报如下: 一、试验地的自然条件本地与整个西藏中部地区一样,具有太阳辐射强、日照时数多、年温差小、日温差大的特点,气候寒冷干燥。年平均气温7.59℃,极
My field is located in the eastern outskirts of Lhasa, about 3 km from the urban area, 3,660 meters above sea level, with obvious characteristics of the plateau climate. In recent years, conifers have been nursed in nurseries, but none have been successful. In order to provide urban areas with evergreen species, in 1978, we summarized past experiences and lessons, selected Pinus tabulaeformis Carr, Pinus armandii and other nursery experiments were conducted and investigated. It is preliminarily believed that Pinus tabulaeformis is an evergreen tree species suitable for growing in high altitude and semi-arid areas and can be expanded in nursery. First introduction of seedling effect as follows: First, the natural conditions of the test site The same as the entire central Tibet, with strong solar radiation, sunshine hours, small annual temperature difference, large temperature difference characteristics, the climate cold and dry. The average annual temperature of 7.59 ℃, very