<正>以总磷、溶解性总磷、正磷酸盐含量等3个指标研究了物理扰动、微生物活性、温度和培养时间等4种环境因素对富营养化河道底泥磷释放的影响。结果表明，环境因素对水体总磷变化的影响效果明显，而对另外两种形态的磷影响较小。对各种处理及其交互作用的差异显著性分析表明，4种环境因素对底泥磷释放影响作用的大小依次为：物理扰动、培养时间、微生物活性、温度，温度主要通过影响微生物活性间接作用于底泥磷释放过程。

In this paper, characteristics of drought tolerance in mycorrhizal fungi inoculated and uninoculated seedlings of Pinus armandii Franch were studied contrastively by means of the artificial simulation method of water stress. The results showed that: with the aggravation of water stress, the permeability of membrane and MDA content increased greatly of two p. armandii Franch seedlings, but compared with the uninoculated seedling, the ascending range of mycorrhizal fungi seedlings was much smaller, while the chlorophyll content, the activaty of NR, the root activity and water content decreased, the descending range was that the former was lower than the latter. It indicated that synthetically drought tolerance of mycorrhizal fungi was stronger than that of uninoculated uninocotion.