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《Chinese Journal of Applied & Environmental Biology》 2009-05
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Comparison of Litter Decomposition of Six Species of Coniferous and Broad-leaved Trees in Subtropical China

GUO Peipei1,JIANG Hong1,2,YU Shuquan1,MA Yuandan2,DOU Rongpeng1 & SONG Xinzhang1(1International Ecology Research Center,Zhejiang Forest University,Hangzhou 311300,China)(2International Institute for Earth System Science,Nanjing University 210093,China)  
Coniferous and broad-leaved trees represent different life types,and their litters differ in decomposition rates.Six species(Pinus massoniana,Metasequoia glyptostroboides,Cunninghamia lanceolata,Schima superb,Michelis chapensis,Cyclobalanopsis glauca) representing typical coniferous and broad-leaved trees were sampled as experimental material for studying leaf litter decomposition in the subtropical region of china.The collected leaf litters were put in litter bags and placed in the forests of the Qiandao Lake.The decomposition characteristics of different leaf litters were analyzed after one-year decomposition.The leaf litter decomposition processes of the six trees were calculated by Olson's exponential models,which were found well fit to the data.The K values of the three coniferous trees(P.massoniana,M.glyptostroboides,C.lanceolata) were 0.51,0.30 and 0.44,which were much lower than those(0.55,1.12 and 0.66) of the three broad-leaved trees(S.superb,M.chapensis,C.glauca).The litters of the coniferous trees required 1.36,2.31 and 1.78 years for 50% decomposition,and 5.87,9.99 and 7.68 years for 95% decomposition respectively,while those of the broad-leaved trees needed 1.26,0.62 and 1.05 years for 50% decomposition,and 5.45,2.68 and 4.54 years for 95% decomposition.There was a significant correlation between the litter decomposition rates and the initial K concentrations(P0.05) according to multiple regression analysis.Also,there were signif icant correlations between the litter decomposition rates and the initial K and Lignin concentrations(P0.05) based on the linear regression analysis.The difference in litter decomposition between coniferous and broad-leaved trees was significantly related to their own qualities.It was found that the initial lignin and K concentrations were the key factors controlling the litter decomposition.Fig 2,Tab 2,Ref 23
【Fund】: 国家自然科学基金项目(No.40671132);; 科技部国际合作项目(No.20073819);; 科技部973项目(Nos.2005CB422207 2005CB422208);; 科技部数据共享平台建设项目(Nos.2005DKA32306 2006DKA32308);; 科技部重大科技基础项目(No.2007FY110300);; 浙江省重大科技专项项目(No.2008C13G2100010)的部分支持~~
【CateGory Index】: S714
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