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武夷山不同海拔植被带土壤活性有机碳的季节变化(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2009年03期
Page:
55-59
Column:
研究论文
publishdate:
2009-05-30

Article Info:/Info

Title:
Seasonal variations of soil microbial available carbon in four plant communities along the altitude gradient in Wuyi Mountain
Author(s):
XU Xia13 QUAN Wei1 WANG Jiashe2 FANG Yanhong2 RUAN Honghua1* YE Jingzhong1
1.Key Laboratory of Forestry Ecological Engineering Jiangsu Province, Nanjing Forestry University, Nanjing 210037, China; 2.Administrative Bureau of Wuyishan National Nature Reserve, Wuyishan 354300, China; 3.University of Oklahoma Norman, Norman OK 730190390, USA
Keywords:
altitude gradient microbial available carbon seasonal variations soil moisture soil temperature Wuyi Mountain
Classification number :
S714;X171.1
DOI:
10.3969/j.jssn.1000-2006.2009.03.013
Document Code:
A
Abstract:
Microbial available carbon (MAC) was one of the most active and important parts of carbon cycle in terrestrial ecosystem. MAC dynamics were examined through a year, using a sequential fumigationincubation procedure, in evergreen broadleaf forest(EBF), coniferous forest(CF), dwarf forest(DF) and alpine meadow(AM), respectively, along the altitude in the natural preserve area in Wuyi Mountain in Fujian province, China, and relationship between MAC and soil moisture, soil temperature, and coil total organic carbon were analyzed. The results indicated: (1) Seasonal variations of microbial available carbon in each site along the altitude was significant both in 0—10 cm and 10—25 cm soil layers. In different types of forests, the magnitude of MAC was in a order of AM, DF, CF and EBF. MAC was significantly higher in the 0—10cm soil layer than that in the 10—25cm’s. (2) There were positive correlations between MAC and soil moisture, soil temperature in each site and different layers. Our study showed that the MAC had obvious variations during a year, it reached the highest in summer, and the lowest in winter. MAC was greatly affected by soil moisture and soil temperature.

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Last Update: 2009-05-30