In this article, sapwood area is used as a scalar to extrapolate the stand water use from whole tree water use measured by heat pulse velocity recorder(HPVR).

• 该文在单木液流测定的基础上,采用边材面积作为纯量,对京北山区水源保护林的主要树种油松、刺槐林进行由单木到林分耗水的推算。