应用生态学报2012，Vol.23Issue(5)：1167-1174,8.
喀斯特峰丛洼地原生林土壤团聚体有机碳的剖面分布
Profile distribution of soil aggregates organic carbon in primary forests in Karst duster-peak depression region
摘要
Abstract
Soil profiles were collected from three primary forests (Itoa orientalis, Platycladus orien-talis, and Radermachera sinica) in Karst cluster-peak depression region to study the composition of soil aggregates, their organic carbon contents, and the profile distribution of the organic carbon. In the three forests, >2 mm soil aggregates were dominant, occupying about 76% of the total. The content of soil total organic carbon ranged from 12. 73 to 68. 66 g· kg-1 , with a significant difference among the forests. The organic carbon content in < 1 mm soil aggregates was slightly higher than that in >2 mm soil aggregates, but most of soil organic carbon was stored in the soil aggregates with greater particle sizes. About 70% of soil organic carbon came from >2 mm soil aggregates. There was a significant positive relationship between the contents of 2-5 and 5-8 mm soil aggregates and the content of soil organic carbon. To increase the contents of 2-8 mm soil aggregates could effectively improve the soil carbon sequestration in Karst region. In Itoa orientalis forest, 2-8 mm soil aggregates accounted for 46% of the total, and the content of soil total organic carbon reached to 37. 62 g · kg-1, which implied that Itoa orientalis could be the suitable tree species for the ecological restoration in Karst region.关键词
土壤团聚体/土壤有机碳/原生林/喀斯特峰丛洼地Key words
soil aggregate/ soil organic carbon/ primary forest/ Karst cluster-peak depression分类
农业科技引用本文复制引用
卢凌霄,宋同清,彭晚霞,曾馥平,王克林,徐云蕾,俞孜,刘艳..喀斯特峰丛洼地原生林土壤团聚体有机碳的剖面分布[J].应用生态学报,2012,23(5):1167-1174,8.基金项目
中国科学院"西部行动计划"项目(KZCX2-XB3-10)、中国科学院战略性先导科技专项(XDA05070404,XDA05050205)、"十二五"国家科技支撑计划项目(2011BAC09B02)、国家自然科学基金项目(31070425,31000224,30970508)和中国科学院"西部之光"人才培养计划项目资助. （KZCX2-XB3-10）
