8Carter A P. The Economic of Technological Change [J]. Scientific American, 1996:25-31.
9Xu M,Beboase T A,Oi Y A. Simple technique to measure stem respiration using a horizontally oriented soil chamber.Can. J. For. Res. ,2000,30:1555- 1560.
10Goulden ML,et al. Measurement of carbon sequestration by long-term eddy covariance :methods and a critical evaluation of accuracy. Global Change Biol. , 1996,2 : 169 - 182.
