9[1]Du Y L,N1soukpoe-Kossi C N,Belanger R,et al.Role of simulated acid rain on Acer negundo and plant nitrition.Acta Botanica Sinica,1999,41(1):80～87.
10[2]Lewis S L,Malhi Y,Phillips O L.Fingerprinting the impacts of global change on tropical forests.Philosophical Transactions of the Royal Society of London Series B-Biological Sciences,2004,359(11):437～462.
