Effects of sulfuric acid rain on decomposition rate and chemical element content of hardwood leaf litter
Effects of sulfuric acid rain on decomposition rate and chemical element content of hardwood leaf litter
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DOI：
10.1139/b83-096
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发表时间：
1983-03
期刊：
影响因子：
1.1
通讯作者：
Jeffrey J. Lee;D. Weber
中科院分区：
文献类型：
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作者：
Jeffrey J. Lee;D. Weber
用模拟酸雨(pH 3.0、3.5或4.0)或对照雨(pH 5.6)对10种阔叶树树种的叶包进行分解。对体重和化学元素浓度的变化进行了408天的跟踪。中酸处理的叶包重量下降最快，尤其是在pH值为3.5时。在pH值为3.5的条件下，叶的腐解率与对照叶的腐解率之比为1.10~12.57。正如预期的那样，低C：N比和高碱基含量的物种的控制分解速率往往较高。而酸雨对分解速率的影响与初始化学元素含量之间没有明显的关系。与S浓度和S氮比的关系不明显，说明硫酸雨并不是通过供给S来促进分解的，而S雨无疑比有机硫更有效。
Simulated sulfuric acid rain (pH 3.0, 3.5, or 4.0) or control rain (pH 5.6) was applied to decomposing leaf packs of 10 hardwood species. Changes in weight and chemical element concentrations were followed for 408 days. Leaf-pack weight decreased most rapidly under the intermediate acid treatments, especially at pH 3.5. The ratio of the decomposition rate of leaves at pH 3.5 to the decomposition rate of the control leaves varied from 1.10 for Quercus garryana to 12.57 for Quercus palustris. As expected, control decomposition rates tended to be higher for species with low C:N ratios and high base content. However, there was no apparent relationship between sulfuric acid rain effect on decomposition rate and initial chemical element content. The lack of a relationship to either S concentration or S:N ratio suggests that the sulfuric acid rain did not enhance decomposition by supplying S; however, the rain S was undoubtedly more available than organic S. For all treatments except pH 3.0, Mn concentrations te...