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杉木纯林与常绿阔叶林土壤活性有机碳库的比较
引用本文:王清奎,汪思龙,冯宗炜.杉木纯林与常绿阔叶林土壤活性有机碳库的比较[J].北京林业大学学报,2006,28(5):1-6.
作者姓名:王清奎  汪思龙  冯宗炜
作者单位:1.1 北京林业大学林木花卉遗传育种教育部重点实验室 2 江西农业大学园林艺术学院3 河北科技师范学院生命科学系
基金项目:中国科学院知识创新工程项目 , 国家自然科学基金
摘    要:森林土壤有机碳库占全球土壤有机碳库的70%,其贮量的微小变化, 都可显著地引起大气CO2浓度的改变.为了解森林类型转换对土壤活性有机碳库的影响,作者于2005年5月在中国科学院会同森林生态实验站采样分析了杉木纯林和常绿阔叶林0~10 cm和10~20 cm土层内土壤活性有机碳含量.结果表明,杉木纯林土壤微生物量碳、可溶性有机碳、自由态和闭锁态轻组有机碳含量均显著低于阔叶林土壤(P0.05).但各活性有机碳组分占土壤有机碳的比率没有规律;两种林分土壤的自由态、闭锁态轻组有机碳和重组有机碳含量与土壤有机碳总量均呈极显著的正相关(P0.01),而土壤微生物量碳、可溶性有机碳仅在常绿阔叶林下与土壤有机碳总量呈显著正相关;杉木纯林土壤各有机碳组分与土壤养分的相关性低于常绿阔叶林,且与全磷的相关性低于有效磷,这说明磷的有效性影响杉木纯林的土壤肥力. 

关 键 词:杉木纯林    常绿阔叶林    土壤活性有机碳库
文章编号:1000-1522(2006)05-0001-06
收稿时间:11 11 2005 12:00AM
修稿时间:2005年11月11日

Comparison of active soil organic carbon pool between Chinese fir plantations and evergreen broadleaved forests.
WANG Qing-kui,WANG Si-long,FENG Zong-wei.Comparison of active soil organic carbon pool between Chinese fir plantations and evergreen broadleaved forests.[J].Journal of Beijing Forestry University,2006,28(5):1-6.
Authors:WANG Qing-kui  WANG Si-long  FENG Zong-wei
Institution:1 Huitong Experimental Station of Forest Ecology, Chinese Academy of Sciences, Hu’nan Province, 418307, P.R.China; 2 Graduate University of Chinese Academy of Sciences, Beijing, 100039, P.R. China; 3 Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, P.R.China.
Abstract:Forest soil contains more than 70% organic carbon pool of the earth. So small lchanges in forest soil organic carbon (SOC) pool can remarkably cause the variance in CO2 density of atmosphere. At Huitong Experimental Station of Forest Ecology, CAS, Hu’nan Province in May 2005, the authors analyzed the active SOC under Chinese fir plantations and evergreen broadleaved forests in the depth of 0.10 cm and 10-20 cm to assess the effects of forest conversion on active SOC pool. Results showed that the contents of soil microbial biomass carbon(MBC), dissolved organic carbon(DOC), free (FLOC) and occluded (OLOC) light fraction organic carbon under Chinese fir plantations were significantly lower than that of evergreen broadleaved forests. However, the rules of percentages of different active SOC to total SOC under two forest soils were not found. The significant correlations were observed between FLOC and SOC, OLOC and SOC, as well as between heavy fraction organic carbon (HOC) and SOC under the two forests. The close relationships between MBC and SOC along with DOC and SOC were only found under evergreen broadleaved forests. It was also found that the correlation coefficients between active fraction organic carbon and soil nutrients under Chinese fir plantations were lower than that of evergreen broad leaved forests, and their relationships with available phosphor were higher than total phosphor. This indicated that phosphor availability affected soil fertility of Chinese fir plantations.
Keywords:Chinese fir plantations  evergreen broadleaved forests  active soil organic carbon pool
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