Carbon Dynam ics of L itter Decomposition in Six Forest Standsof Subtropica l China

LI Zheng-cai; XU De-ying; YANG Xiao-sheng; FU Mao-yi; SUN Xue-zhong; XI Jin-rong

Based on the field study, this paper deals with carbon dynamics of litter decomposition in six land-usetypes of forests in the subtrop ical area of south China. The results showed that: ( 1 ) at the beginning of thedecomposition, the carbon content in litter increased, indicating the accumulation p rocess of carbon; later, thecarbon content decreased, while after one year of decomposition, the carbon content of that in the Phy llostachysedu lis extensively managed stand was reduced by 11. 7%; ( 2) the carbon quantity of litter in the Phy llostachysedu lis stand decreased from the beginning, while those for the others increased first and then decreased; after oneyear, the carbon quantity of the extensively managed Ph. edulis stand decreased by 53. 8%; the release rate ofcarbon from the highest to lowest was ranked as follows: the extensively managed Ph. edu lis stand, Ph. praecoxstand, Cunningham ia lanceolata stand, the intensively managed Ph. edu lis stands and Pinus m assoniana; (3) theremaining carbon amount of forest litter could be described by exponential equation models; (4) the decomposition rate of litterwas positively correlated with air temperature.

1. Research Institute of Subtrop ical Forestry, CAF, Fuyang 311400, Zhejiang, China

2. Research Institute of Forest Ecology, Environmentand Protection, CAF, Beijing 100091, China

3. Forestry Bureau of Fuyang City, Fuyang 311400, Zhejiang, China

Received Date: 2007-05-11

Abstract: Based on the field study, this paper deals with carbon dynamics of litter decomposition in six land-usetypes of forests in the subtrop ical area of south China. The results showed that: ( 1 ) at the beginning of thedecomposition, the carbon content in litter increased, indicating the accumulation p rocess of carbon; later, thecarbon content decreased, while after one year of decomposition, the carbon content of that in the Phy llostachysedu lis extensively managed stand was reduced by 11. 7%; ( 2) the carbon quantity of litter in the Phy llostachysedu lis stand decreased from the beginning, while those for the others increased first and then decreased; after oneyear, the carbon quantity of the extensively managed Ph. edulis stand decreased by 53. 8%; the release rate ofcarbon from the highest to lowest was ranked as follows: the extensively managed Ph. edu lis stand, Ph. praecoxstand, Cunningham ia lanceolata stand, the intensively managed Ph. edu lis stands and Pinus m assoniana; (3) theremaining carbon amount of forest litter could be described by exponential equation models; (4) the decomposition rate of litterwas positively correlated with air temperature.

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Reference (19)

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Carbon Dynam ics of L itter Decomposition in Six Forest Standsof Subtropica l China

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