Jiang Fa-Yan, Sun Hui, Lin Bo, Liu Qing
Department of Environmental Science and Engineering, Sichuan University, Chengdu 610065, China.
Ying Yong Sheng Tai Xue Bao. 2009 Nov;20(11):2581-7.
Soil samples at 0-30 cm depth were collected from the primary spruce (Picea asperata) forest and its plantations at different succession stages (22-, 47-, and 65-year-old) in subalpine zone of western Sichuan Province to study the dynamic changes of soil organic carbon stock and labile organic carbon content. The soil total organic carbon (TOC) stocks in 0-10, 10-20, and 20-30 cm soil layers decreased from 95.87, 79.08, and 71.55 t x hm(-2) in 22-year-old plantation to 56.12, 34.75, and 31.06 t x hm(-2) in 65-year-old plantation, respectively, and the TOC stocks in these soil layers in 47 and 65-year-old plantations were less than those (88.08, 71.16 and 64.81 t x hm(-2), respectively) in primary forest. The easily oxidizable organic carbon (EOC) contents in 0-10, 10-20, and 20-30 cm soil layers decreased from 35.89, 26.91, and 26.00 g x kg(-1) in primary forest to 20.25, 14.50, and 12.36 g x kg L(-1) in 65-year-old plantation, the microbial biomass carbon (MBC) contents decreased from 524.44, 273.26, and 257.97 mg x kg(-1) in primary forest to 312.41, 186.95, and 152.18 mg x kg(-1) in 65-year-old plantation, and the particulate organic carbon (POC) contents decreased from 40.23, 27.10, and 19.55 g x kg(-1) in primary forest to 12.33, 7.31, and 5.32 g x kg(-1) in 65-year-old plantation, respectively. The results suggested that within the long succession period of primary P. asperata forest to its plantations in the subalpine zone of western Sichuan Province, soil TOC and labile organic carbon were in the state of net consumption.
在四川省西部亚高山地带，采集了原始云杉（云杉）林及其不同演替阶段（22年、47年和65年）人工林0-30厘米深度的土壤样本，以研究土壤有机碳储量和活性有机碳含量的动态变化。0-10厘米、10-20厘米和20-30厘米土层的土壤总有机碳（TOC）储量分别从22年人工林的95.87、79.08和71.55吨·公顷-2降至65年人工林的56.12、34.75和31.06吨·公顷-2，47年和65年人工林这些土层的TOC储量低于原始森林（分别为88.08、71.16和64.81吨·公顷-2）。0-10厘米、10-20厘米和20-30厘米土层的易氧化有机碳（EOC）含量从原始森林的35.89、26.91和26.00克·千克-1降至65年人工林的20.25、14.50和12.36克·千克-1，微生物量碳（MBC）含量从原始森林的524.44、273.26和257.97毫克·千克-1降至65年人工林的312.41、186.95和152.18毫克·千克-1，颗粒有机碳（POC）含量从原始森林的40.23、27.10和19.55克·千克-1分别降至65年人工林的12.33、7.31和5.32克·千克-1。结果表明，在四川省西部亚高山地带原始云杉林向其人工林的长期演替过程中，土壤TOC和活性有机碳处于净消耗状态。
