6Berger T W, Neubauer C, Glatzel G. Factors controlling soil carbon and nitrogen stores in pure stands of Norway spruce and mixed species stands in Austria[J]. Forest Ecology and Management, 2002, 159:3～14.
7Conard S G, A E Jarmillo, K Cromack, S Rose. The role of the Genus ceanothus in western forest ecosystems[M]. New York: US Department of Agriculture, 1985. 181～182.
8Binkley D. Mixtures of nitrogen-fixing and non-nitrogen-fixing tree species[A]. In: Cannell M G R, Malcolm D C, Robertson P A (Eds.). The ecology of mixed-species stands of trees[C]. Oxford:The British Ecological Society,1992. 117～157.
9Xiongwen Chen, Bailian Li. Change in soil carbon and nitrogen storage after human disturbance of a primary Korean pine forest in Northeast China[J]. Forest Ecology and Management, 2003, 186:197～206.
10Reuss J O, G S Innis. A grassland nitrogen flow simulation model[J]. Ecology, 1977, 58: 379～388.
