Author/Authors :
Zhou، نويسنده , , Wen-Jun and Sha، نويسنده , , Li-Qing and Schaefer، نويسنده , , Douglas A. and Zhang، نويسنده , , Yi-Ping and Song، نويسنده , , Qing-Hai and Tan، نويسنده , , Zheng-Hong and Deng، نويسنده , , Yun and Deng، نويسنده , , Xiao-Bao and Guan، نويسنده , , Hui-Lin، نويسنده ,
Abstract :
To clarify how litter decomposition processes affect soil dissolved organic carbon (DOC) and soil dissolved nitrogen (DN) dynamics, we conducted a field experiment on leaf litter and collected DOC and DN from the underlying soil in a tropical rainforest in Xishuangbanna, southwest China. Principal components analysis (PCA) showed the first PCA axis (corresponding to degraded litter quantity and quality) explained 61.3% and 71.2% of variation in DOC and DN concentrations, respectively. Stepwise linear regression analysis indicated that litter carbon mass controlled DOC and hemicellulose mass controlled DN concentrations. Litter decomposition was the predominant factor controlling surface-soil DOC and DN dynamics in this tropical rainforest.
Keywords :
Tropical rainforest , Dissolved organic carbon , Dissolved nitrogen , Litter decomposition , Limiting factor
