【摘要】 <正> 酸雨对森林生态系统影响的研究资料表明,酸雨的长期影响,会降低微生物的活性,对森林枯枝落叶的分解产生影响。受酸雨的影响,土壤的A₀和A₁层的pH值下降,致使嗜中偏碱性的氨化菌、硝化菌和固氮菌的发育受到影响,因而使微生物的同化和固定的氮量有减少的可能。重庆是我国受酸雨危害较严重的地区,1984年以来,我所组织多种学科的人员对该地区酸雨对森林生态系统的影响进行了研究,本文是有关酸雨对土壤微生物活性影响研究的初步结果。更多还原

【Abstract】 The effects of acid rain in Chongqing region on biochemical intensities of soil microorganisms and activities of soil enzymes were studied in 1984—1986. Acid rain reduces soil ammonification and nitrification, increases cellulose decomposition, but has little effects on humus decomposition and nitrogen fixation. The activities of soil proteinase, invertase and catalase were reduced, while the activity of phosphatase was increased markedly.更多还原