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西宁市是青海省的省会,地处青藏高原东缘。两侧的南北两山是全市的主要自然景观区,属半干旱高原大陆性气候,年均降雨量仅368毫米,主要集中在7、8、9月份,年平均蒸发量达1763毫米,年平均气温6℃,无霜期只有140—160天。由于特定的自然地理条件,山势起伏、沟岭相隔、地形破碎,岩石裸露,土壤贫瘠,植物稀少,不少地方寸草不生,海拔2170—2850米,相对高差500—600米,坡度15—35度。长期以来水土流失严重,其景观与环境同省会城市的地位极不相称。五十年代以来,两山虽然搞了一些绿化,但因自然条件恶劣和囿于财力,技术经验不足等因素的制约,收效甚微。随着社会经济的发展和人民
Xining is the capital city of Qinghai Province and is located on the eastern edge of the Qinghai-Tibet Plateau. Both sides of the two mountains are the city’s major natural landscape area, is a semi-arid plateau continental climate, with an average annual rainfall of only 368 mm, mainly in July, August and September, the average annual evaporation of 1763 mm, the average annual Temperature 6 ℃, frost-free period of only 140-160 days. Due to the specific natural and geographical conditions, the ups and downs of the mountains, separated by the ditch ridge, the terrain broken, rock bare, poor soil, rare plants, in many places inchrowing, elevation 2170-2850 meters, relative elevation 500-600 meters, slope 15-35 degree. Soil and water loss has long been serious, and its landscape and environment are disproportionately associated with the capital cities. Since the 1950s, although some greening has taken place in both mountains, it is ineffective due to the constraints of poor natural conditions and lack of financial resources and technical experience. With the social and economic development and people