西藏的森林主要分布在横断山脉和念青唐古拉山以南的雅鲁藏布江中下游地区。这里林区而积辽阔,蓄积丰富,是东北、西南之外的又一重要原始林区。由于地形复杂相对高差很大,而且山脉与河流走向多变,对印度洋季风的流入承受和屏障等作用不同,导致水热条件在水平和垂直方向都有明显的差异,对森林的生长和分布有着巨大的影响,形成我国林业区划中一个独特单元。深入研究其分布规律和发 The forests in Tibet are mainly distributed in the middle and lower reaches of the Brahmaputra south of the Hengduan Mountains and south of the Nyainqentanglha Mountain. Here vast forest plot, rich accumulation, is the northeast, southwest of another important original forest. Due to the complex terrain, the relative elevation difference and the changing trend of the mountains and rivers, the influx and barrier of the Indian Ocean monsoon are different, resulting in obvious differences in horizontal and vertical hydrothermal conditions, the growth and distribution of forests Has a huge impact, forming a unique unit in China’s forestry zoning. In-depth study of its distribution and hair