欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

武夷山不同海拔高度土壤活性有机碳变化

徐侠1;陈月琴1;汪家社2;方燕鸿2;权伟1;阮宏华1;徐自坤2   

  1. 1南京林业大学森林资源与环境学院江苏省林业生态工程重点实验室, 南京 210037; 2福建武夷山国家级自然保护区管理局, 福建武夷山 354300
  • 收稿日期:2007-07-09 修回日期:1900-01-01 出版日期:2008-03-21 发布日期:2008-03-21

Variations of soil labile organic carbon along an altitude gradient in Wuyi Mountain.

XU Xia1; CHEN Yue-qin1; WANG Jia-she2; FANG Yan-hong2; QUAN Wei1; RUAN Hong-hua1; XU Zi-kun2   

  1. 1Key Laboratory of Forestry Ecological Engineering of Jiangsu Province, College of Forest Resources and Environmental Science, Nanjing Forestry University, Nanjing 210037, China; 2Administrative Bureau of Wuyi Mountain National Nature Reserve, Wuyishan 354300, Fujian, China

  • Received:2007-07-09 Revised:1900-01-01 Online:2008-03-21 Published:2008-03-21

摘要: 采用连续熏蒸培养法,测定了福建武夷山自然保护区不同海拔高度具有代表性的中亚热带常绿阔叶林、针叶林、亚高山矮林以及高山草甸土壤中有效碳含量,分析了土壤有效碳(LOC)与微生物量碳(MBC)、土壤总有机碳(TOC)、细根生物量(FRB)和土壤全氮(TN)之间的关系.结果表明:土壤有效碳占总有机碳的3.40%~7.46%;微生物量碳只是土壤有效碳中的一部分,占土壤有效碳26.87%~80.38%; 不同林分土壤有效碳含量随海拔增高而显著增大,随土层深度的增加而降低;土壤有效碳与微生物量碳、土壤总有机碳、细根生物量、土壤全氮之间呈极显著的相关关系.高海拔土壤有效碳含量显著高于低海拔土壤.

关键词: 土壤容重, 土壤孔隙度, 土壤贮水量, 秸秆还田, 土壤养分, 氮肥, 玉米产量

Abstract: By using sequential fumigationincubation method, this paper determined the soil labile organic carbon (LOC) content under evergreen broadleaf forest, coniferous forest, sub-alpine dwarf forest, and alpine meadow along an altitude gradient in Wuyi Mountain National Nature Reserve in Fujian Province of China, with its relations to soil microbial biomass carbon (MBC), total organic carbon (TOC), total nitrogen (TN), and fine root biomass (FRB) analyzed. The results showed that soil LOC occupied 3.40%-7.46% of soil TOC, and soil MBC occupied 26.87%-80.38% of the LOC. The LOC under different forest stands increased significantly with altitude, and decreased with soil depth. Soil LOC had very significant correlations with soil MBC, TOC, TN and FRB, and its content was obviously higher at higher altitudes than at lower altitudes.

Key words: soil bulk density, straw returning, soil nutrient, nitrogen fertilizer, soil porosity, soil water storage, maize yield