%0 Journal Article
%T Content and seasonal change in soil labile organic carbon under different forest covers<br>不同森林植被下土壤活性有机碳含量及其季节变化
%A ZHANG Jian
%A WANG Xi-Long
%A WANG Qing-Kui
%A LIU Yan-Xin
%A <br>张 剑
%A 汪思龙
%A 王清奎
%A 刘燕新
%J 中国生态农业学报
%D 2009
%I 
%X Based on the concentrations of soil labile organic carbon (SLOC) pools under native evergreen broad-leaved forest (NBF), and three plantations of pure Cunninghamia lanceolata , pure Michelia macclurei and their mixed forest in different seasons, the effect of forest types on the content and seasonal changes of SLOC was analyzed for Huitong County of Hunan Province. The results show that SLOC content decreases after native evergreen broad-leaved forest are substituted by planted forest. Compared with C. lanceolata plantation, C. lanceolata and M. macclurei mixed forest (MCM) increases SLOC content. However, the difference is statistically insignificant except for water-soluble organic carbon (WSOC). Substantial seasonal fluctuations in SLOC under forests are observed. Throughout the year, WSOC decreases in the following order of NBF > MCM > pure M. macclurei plantation (PM) > pure C. lanceolata plantation (PCF). For soil microbial biomass carbon (MBC), hot-water extractable C (HWC) and hot-water extractable carbohydrate-C (HWcC) is in the following order of NBF > PM > MCM > PCF. Compared with PCF, MCM increases soil quality. However, seasonal trends of SLOC under different forest covers are not completely consistent, suggesting that seasonal fluctuations in SLOC are influenced not only by climatic factors like temperature and precipitation, but also by vegetation type.
%K Cunninghamia lanceolata plantation
%K Michelia macclurei plantation
%K Planted mixed forest
%K Native evergreen broad-leaved forest
%K Soil labile organic carbon
%K Seasonal change<br>杉木人工林
%K 火力楠人工林
%K 人工混交林
%K 地带性常绿阔叶林
%K 土壤活性有机碳
%K 季节变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=DE307CCD3786E5AFBD743DBAB8FF1E62&yid=DE12191FBD62783C&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=2001E0D53B7B80EC&eid=F4B561950EE1D31A&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=5&reference_num=38