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生长季新疆伊犁速生杨群落土壤的呼吸特征(PDF)

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

Issue:
2009年02期
Page:
65
Column:
研究论文
publishdate:
2009-03-30

Article Info:/Info

Title:
Diurnal and monthly variation of soil respiration during growing season in Yili, Xinjiang
Author(s):
GE Zhiwei1 GONG Jirui1* DUAN Qingwei1 YOU Xin1 ZHANG Xinshi12
1.College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China; 2.Institute of Botany, the Chinese Academy of Science, Beijing 100093, China
Keywords:
fast growing poplar shelterbelt growing season soil respiration soil temperature Power model Yili area
Classification number :
S714
DOI:
10.3969/j.jssn.1000-2006.2009.02.016
Document Code:
A
Abstract:
As a large carbon pool, the shelter forest is an important part in the study on the CO2 fixing efficiency of the forest ecosystem. The soil respiration is a dispensable part of the CO2 fixing efficiency. Nine fast growing poplar in the shelter forest were selected, which all were close to each other and in the similar environment and different age level. The data were collected monthly in the growing season (May to October). The soil temperature and respiration were observed. The analysis results revealed that the most active soil respiration was observed in July and August during the growing season in Yili, Xinjiang. The maximum of soil respiration in the daytime appeared around 16:00. The largest absolute and relative value both could be found in August, the bloom month of plants in Xinjiang. As the growing of the forests, the absolute and relative changing of soil respiration in the daytime and every month were diminished. From the results of estimating, the R2 reaches the peak when comparing the function between the soil temperature (5 cm under the soil surface) and respiration with the Power model.

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Last Update: 2009-03-30