Effects of elevated nitrogen deposition on soil microbial biomass carbon in major subtropical forests of southern China
Effects of elevated nitrogen deposition on soil microbial biomass carbon in major subtropical forests of southern China
复制标题
氮沉降升高对我国南方亚热带主要森林土壤微生物生物量碳的影响
DOI：
10.1007/s11461-009-0013-7
复制
发表时间：
2009-03
期刊：
影响因子：
--
通讯作者：
Wang, Hui
中科院分区：
文献类型：
--
作者：
Mo, Jiangming;Xue, Jinghua;Fang, Yunting;Lu, Xiankai;Li, Jiong;Wang, Hui
于2004年11月和2006年6月研究了氮沉降对中国南方3种森林类型土壤微生物量碳（C）和可溶性有机碳（DOC）的影响。在鼎湖山自然保护区的松林（PF）、松阔混交林（MF）和季风万年青阔叶林（MEBF）中设置样地。施氮处理包括对照（不施氮）、低氮（50 kg N/（hm 2·a））、中氮（100 kg N/（hm 2·a））和高氮（150 kg N/（hm 2·a））。微生物生物量C和可提取的DOC使用氯仿熏蒸提取法测定。结果表明，2006年6月微生物量碳和可提取DOC高于2004年11月，MEBF高于PF或MF。土壤微生物量C和可溶性DOC对氮沉降的响应因林分类型和氮处理水平而异。在PF和MF森林中，氮添加对土壤微生物生物量C和可提取DOC的影响没有显著差异。在微生物量碳中，随着施氮量的增加，土壤微生物生物量碳总体上呈下降趋势，高施氮量显著降低了土壤微生物生物量碳。土壤可溶性溶解性有机碳对微生物量碳的响应趋势与微生物量碳相反。这些结果表明，氮沉降可能增加了研究区微生物区土壤有机碳的积累。
The effects of elevated nitrogen deposition on soil microbial biomass carbon (C) and extractable dissolved organic carbon (DOC) in three types of forest of southern China were studied in November, 2004 and June, 2006. Plots were established in a pine forest (PF), a mixed pine and broad-leaved forest (MF) and monsoon evergreen broad-leaved forest (MEBF) in the Dinghushan Nature Reserve. Nitrogen treatments included a control (no N addition), low N (50 kg N/(hm2·a)), medium N (100 kg N/(hm2·a)) and high N (150 kg N/(hm2·a)). Microbial biomass C and extractable DOC were determined using a chloroform fumigation-extraction method. Results indicate that microbial biomass C and extractable DOC were higher in June, 2006 than in November, 2004 and higher in the MEBF than in the PF or the MF. The response of soil microbial biomass C and extractable DOC to nitrogen deposition varied depending on the forest type and the level of nitrogen treatment. In the PF or MF forests, no significantly different effects of nitrogen addition were found on soil microbial biomass C and extractable DOC. In the MEBF, however, the soil microbial biomass C generally decreased with increased nitrogen levels and high nitrogen addition significantly reduced soil microbial biomass C. The response of soil extractable DOC to added nitrogen in the MEBF shows the opposite trend to soil microbial biomass C. These results suggest that nitrogen deposition may increase the accumulation of soil organic carbon in the MEBF in the study region.
登录
查看更多内容
影响因子：
3.7
作者：
KATZENSTEINER, K;GLATZEL, G;KAZDA, M
通讯作者：
KAZDA, M
影响因子：
1.7
作者：
J. Paul;E. Beauchamp
通讯作者：
J. Paul;E. Beauchamp
影响因子：
--
作者：
Zhou Guo
通讯作者：
Zhou Guo
影响因子：
9.7
作者：
A. Smolander;A. Kurka;V. Kitunen;E. Mälkönen
通讯作者：
A. Smolander;A. Kurka;V. Kitunen;E. Mälkönen
影响因子：
3.7
作者：
Mo, Jiangming;Brown, Sandra;Kong, Guohui
通讯作者：
Kong, Guohui