Leaching of Dissolved Organic Carbon (DOC) as Affected by Plant Residue Composition and Soil pH
Leaching of Dissolved Organic Carbon (DOC) as Affected by Plant Residue Composition and Soil pH
复制标题
DOI：
10.1007/978-94-007-5634-2_86
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Kongcao Xiao;J. Zhou;Xingmei Liu;Jian-jun Wu;Jianming Xu
中科院分区：
文献类型：
--
作者：
Kongcao Xiao;J. Zhou;Xingmei Liu;Jian-jun Wu;Jianming Xu
在实验室进行淋滤柱实验，研究土壤pH值和植物残体掺入量对溶解有机碳（DOC）产量的影响。结果表明，当植物残体掺入pH值非常低的土壤（pH 3.0和pH 3.5）时，渗滤液的pH值大大增加，但在pH 6.5的土壤中则不然。淋洗实验结束时，对照柱中的累积DOC输出量为260至457 mg C kg−1soil，其中最高量出现在pH 6.5的土壤中。与相应对照相比，植物残留物掺入显着增加了稻草处理的累积 DOC 产量 471–948 mg C kg−1soil 和紫云英 (CMV) 处理的 2,268–4,068 mg C kg−1soil。我们的结果表明，土壤 pH 值和植物残留物的成分是决定植物残留物分解过程中 DOC 产量的关键因素。
Leaching column experiment was conducted in the laboratory to investigate the influence of soil pH and plant residue incorporation on dissolved organic carbon (DOC) output. The results indicated that the pH in leachate was greatly increased when plant residues were incorporated into soils with very low pH (pH 3.0 and pH 3.5), but it was not the case in the soil with pH 6.5. At the end of leaching experiment, cumulative DOC output ranged from 260 to 457 mg C kg−1soil in the control columns, and the highest amount was found in the soil with pH 6.5. Plant residue incorporation significantly increased cumulative DOC output by 471–948 mg C kg−1soil at rice straw treatment and by 2,268–4,068 mg C kg−1soil at Chinese milk vetch (CMV) treatment as compared to the corresponding control. Our results suggest that soil pH and the composition of plant residues are the key factors for determining DOC output during plant residue decomposition.