【摘要】 <正> 横断山脉位于青藏高原东南部及毗邻的滇西北地区,是我国有名的山地。它们自西而东,依次布列着呈南北向的伯舒拉岭—高黎贡山、他念他翁山—怒山、宁静山—云岭、沙鲁里山、大雪山和岷山等高大山脉;其间夹峙着浪涛滚滚的怒江、澜沧江、金沙江、雅砻江、大渡河与岷江。山势陡峻高耸,河谷狭窄幽深,在河谷的某些区段,主要由于地形导致的地方气候的影响,分布发育着以耐旱灌木和草本为优势的植被。这是横断山区独特而重要的景观植被类型之一。但其植物生长稀疏,经济价值很低,如何改造利用发挥其潜力,虽有不少考察报导,迄今仍是一个重要的研究课题。更多还原

【Abstract】 The community, which is dominated by some drought-enduring scrubs and grasses developed in the arid valleys of the Hengduan Mountainous region is one of the particular and important;landscape types of vegetation. According to the difference of heat quantity and vegetation in the region, the arthors divided the arid valleys into 3 kinds of group, hot-arid, warm-arid and temperated-arid; this paper briefly leviews the utilizational conditions of the arid valley and the ameliorational directions of vegetations. According to the principles of making full use of heat and the dominance of natural resources in the region, and in order avoid drought or adapt to droughth,this paper makes some suggestions amelioration of the natural vegetation in present and on development of agriculture, forestry, economic plant and animal husbandry.更多还原