Journal of Food, Agriculture and Environment

The impact of soil temperature and moisture content in different depths to heterotrophic components of soil respiration

Author(s):

Hailong Wu ¹, Zhuo Pang ^{1, 2}, Xinxiao Yu ¹*, Yan Zhang ¹

Recieved Date: 2013-06-18, Accepted Date: 2013-08-30

Abstract:

Soil respiration is a hot issue when the fact of global warming is realised by people around the world because it indicates that soil related system is carbon source or sink. Measurement depth determines the accuracy of soil carbon research for the temperature and moisture content is variance in different depth. Sensitivity indexes of heterotrophic respiration to temperature and moisture content in different soil depth were analysis. The results indicated that the apparent Q₁₀ increased with the soil depth at the same site. The best depth for measurement of soil temperature and moisture content depends on season and dry/wet period, which were 2, 10, 5 and 2 cm under the surface respectively in spring, summer, autumn and winter. In the upper layers (2 or 5 cm), the most influential factor was soil moisture content, while in the deeper layers (15  or 20 cm) was temperature. The specific depth for soil respiration measurement could improve the precision of carbon flux research.

Keywords:

Soil respiration, different depth, sensitivity index, temperature, soil moisture content

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2104-2109

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