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Decomposition of leaf litter of four native broad-leaved
tree species in south China |
| Hao ZHANG1,Leeman CHU1,Xueying ZHUANG2, |
| 1.Department of Biology,
the Chinese University of Hong Kong, Hong Kong, China; 2.College of Forestry,
South China Agricultural University, Guangzhou 510642, China; |
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Abstract Leaf litter decomposition of Castanopsis fissa, Cinnamomum camphora, Michelia macclurei and Mytilaria laosensis in mixed broad-leaved plantation and pine plantation was studied by the litterbag method for 1 year. Leaf litter decomposition rates of the four species were highest in Cinnamomum camphora, followed by Mytilaria laosensis, Michelia macclurei, and Castanopsis fissa. The decomposition rates of all four species were higher in the mixed than in pine plantation. The decomposition processes of all species followed Olson’s exponential model. The decomposition coefficients (k) of all species were also higher in the mixed plantation and had the same order as the decomposition rates. The nitrogen contents of leaf litter of the different species studied increased initially and then decreased with time. Net release of N only occurred in pine plantation. Potassium contents appeared to decrease first but later increase, and net release was only found in mixed plantation. Calcium, magnesium and boron all showed similar pattern of initial increase followed by later decrease. They all had net release in both mixed and pine plantations. The release of phosphorus varied greatly between species and showed no clear trend.
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| Keywords
native broad-leaved trees
leaf litter
plantations
decomposition rate
nutrient release
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Issue Date: 05 December 2009
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