2. Hg absorbency of white poplar, willow and pine was low, while that of the larch was high with the elm being the highest.
其中毛白杨、垂柳和油松对汞的吸收能力较低,落叶松叶的吸收能力较高,榆树吸收汞的能力最高。
3. Vertical distribution of air-Hg above vegetable gardens, farmland, orchards and woodland was studieds with the gold-pipe air-Hg accumulation method.
以金粒管富集气汞法研究了蔬菜地、农田、果园、林地等植被类型的近地面气汞的分布特性。