Heavy metal contents and enzymatic activities of soil in tree root zone at different air-polluted areas;

Microbial diversity in root zone soils of Acacia confusa and Eucalyptus urophylla polluted by heavy metals

The results showed that inhibiting effects on the seed germination and young seedling growth were significant,which indicated that there should be some allelopathic chemicals in the root zone soil.

The results showed that the allelopathic effects of extracts from Root-zone soil of Panax notoginseng on root length,seedling height,and fresh weight and NR activity of notoginseng were different.