SIMULATED ACID-RAIN (H2SO4) AND MICROBIAL ACTIVITY IN SOIL
SIMULATED ACID-RAIN (H2SO4) AND MICROBIAL ACTIVITY IN SOIL
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DOI：
10.1016/0038-0717(83)90007-x
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发表时间：
1983-01-01
影响因子：
9.7
通讯作者：
STOTZKY, G
中科院分区：
文献类型：
--
作者：
BEWLEY, RJF;STOTZKY, G
Soil mixtures containing 9% kaolinite, 9% montmorillonite, or no clay supplements were amended with 1% glucose and treated ith H2SO4 to lower their bulk pH to levels ranging from 5.4-0.8. Acidification had little effect on soil respiration (CO2 evolution) until the pH was lowered below 3. Glucose was not degraded at approximately pH 2 but was degraded on ice the soil pH was raised to non-inhibitory levels, i.e. pH 4.1-4.3. When the soil pH was reduced to 1.4 or below, it was necessary to reinoculate the soil and arise the pH to a non-inhibitory level to obtain CO2 evolution. The addition of clay minerals, particularly montmorillonite, mitigated the toxic effect of H2SO4, especially at pH values below 3. The growth of Aspergillus niger, A. flavipes, Trichoderma viride and Penicillium brefeldianum was reduced or completely inhibited in soils acidified below pH 3.5. The addition of montmorillonite enhanced fungal growth under these acidic conditions, but kaolinite had no effect.
