6Jiang T,Ding Y,Griggs D J,et al.Climate Change 2001:The Scientific Basis:Contribution of Working Group I to the Third assessment Report of the Intergovernmental Panel on Climate Change[M].Cambridge:Cambridge University Press,2001:185-237.
7Kushwaha C P,Tripathi S K,Singh K P.Variations in soil microbial biomass and N availability due to residue and tillage management in a dryland rice agroecosystem[J].Soil and Tillage Research,2000,56:53-166.