摘要
以浙江天童地区的栲树群落为参照,选择了木荷林、灌丛、马尾松林、杉木林、金钱松林、竹林、茶园和裸地等土地利用类型,测定了土壤有机碳含量,以及在25℃和60%饱和含水量条件下培养33d的有机碳矿化速率。结果表明:土壤有机碳含量与矿化速率均以常绿阔叶林最高,针叶林、竹林和茶园次之,裸地最低;相反,土壤有机碳矿化释放的CO2-C比例以栲树林最低。可见,常绿阔叶林土壤的固碳能力高于其它类型,常绿阔叶林被改为其它类型后,土壤有机碳含量和矿化速率显著下降。
Taking Castanopsis fargesii forest as reference, different land use types including Schima superba forest, shrubs, Pinus massoniana forest, plantations of Cunninghamia lanceolat, Pseudolarix kaempferi and Phyllostachys pubescen, Phyllostachys pubescens forest, tea garden, and bare land in Tiantong, Zhejiang Province were selected to investigate their soil organic carbon （SOC） contents, and the SOC mineralization rate after incubated at 25 ℃ and 60% field water capacity over 33 days. The results showed that evergreen broad-leaved forest （ Castanopsis fargesii） had the highest SOC content and mineralization rate, followed by coniferous forest, tea garden and bamboo forest, and bare land, while the CO2-C released from the mineralization of SOC was the lowest in C. fargesii forest, suggesting that evergreen broad-leaved forest had the highest carbon-fixing ability, and the SOC content and mineralization rate would have a significant decrease when the land use type shifted from evergreen broad-leaved forest to others.
出处
《生态学杂志》
CAS
CSCD
北大核心
2007年第7期1021-1026,共6页
Chinese Journal of Ecology
基金
国家自然科学基金重点资助项目(30130060)
关键词
土地利用类型
土壤有机碳
矿化
林地
land use type
soil organic carbon
mineralization
forestland.
