青海东部黄土丘陵沟壑地区位于黄土高原向青藏高原的过渡地带,习惯上称为浅山地区。由于历史和地理的原因,这里的天然林残存无几,乔木林极其稀少,灌木林也不多,在此特定条件下,开展适地适树的调查研究,存在许多困难。近年来,森林生物量的调查研究发展较快,但灌木 The loess hilly and gully region in the east of Qinghai is located in the transitional zone between the Loess Plateau and the Qinghai-Tibet Plateau and is commonly referred to as the shallow mountain region. Due to historical and geographical reasons, there are few natural forests here, extremely rare arbor forests and few shrubberies. Under these specific conditions, there are many difficulties in carrying out investigation and research on the suitable tree species. In recent years, the survey of forest biomass has developed rapidly, but shrubs