%0 Journal Article
%T Effects of human impacts on fine roots and soil organic matter of a pine forest in subtropical China<br>人为干扰对鼎湖山马尾松林土壤细根和有机质的影响(英文)
%A MO Jiangming
%A Sandra Brown
%A PNEG Shaolin
%A KONG Guohui
%A FANG Yunting
%A <br>莫江明
%A Sandra Brown
%A 彭少麟
%A 孔国辉
%A 方运霆
%J 生态学报
%D 2005
%I 
%X Effects of human impacts on fine roots and soil organic matter of a pine forest in subtropical China were studied by comparing treatment (harvesting understory and litter according to practice of local people) and control (no harvest) plots in a pine forest from 1990 to 1995. During this studied period, the total amount of material harvested by this practice in treatment plots was 21.7 t/hm~2. In control plots, the standing stocks of understory increased from 2.2 to 11.1 t/hm~2 at a significantly linear pattern, while the standing stocks of litter (including dead understory) increased from 3.0 to 13.3 t/hm~2. Harvesting practice had no significant effect on the standing fine root biomass, but significantly reduced soil light organic matter in pine forest. Mass loss in decomposing fine roots was linear in both control and treatment plots. Fine roots decomposed significantly faster in treatment (40.8 percent of initial mass remaining at the end of the 448 day experiment) than in control plots (44.3%). Nutrient losses from decomposing fine roots were significantly faster in treatment plots than in control plots for N and P, but there were no significant difference for other elements. These trends indicated that there could be a higher potential for nutrient loss by harvesting understory and litter (more nutrients available for understory uptake and litter mobilizing N during early stage of decomposition) and by leaching in treatment plots.
%K human-impact
%K soil organic matter
%K fine roots
%K decomposition
%K Pinus massoniana
%K subtropical China<br>人为干扰
%K 土壤有机质
%K 细根
%K 分解
%K 马尾松
%K 南亚热带
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=6DDD4CC3872B7CC3&yid=2DD7160C83D0ACED&vid=C5154311167311FE&iid=38B194292C032A66&sid=ABF2590617D31FFD&eid=A03A15CF5604A8B0&journal_id=1000-0933&journal_name=生态学报&referenced_num=5&reference_num=45