Soil Carbon Mineralization and Microbial Biomass Carbon of In Situ and Exchange-Location Incubation in Forest along Urban-Rural Gradient

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Urbanization in high-speed nowadays is changing soil carbon dynamic. Soil carbon mineralization (Cm) and microbial biomass carbon (MBC) of in situ and exchange-location incubation was characterized along urban-rural gradient in Nanchang, China. As a result, soil Cm and MBC of in situ incubation were higher in urban than in suburban, which were significantly higher than those in rural area (P<0.05), at the same time, urban soils incubating in rural area mineralized about 1.8 times the amount of carbon than rural soils incubating in rural area; MBC in soils of exchange-location incubation exhibited a significant decrease tendency with area farther away from urban as well (P<0.05), while there was no significant difference observed in Cm of soils from the same origin incubating in different area between urban, suburban and rural (P>0.05). The result indicated that urban soils have potential for higher losses of carbon than rural soils.

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237-242

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December 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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