9GRIER C C,VOGT K A, KEYES M R, et al. Biomass distribution and above-and below-ground production in young and mature Abies amabilis zone ecosystems of the Washington Cascades[J].Canadian Journal of Forest Re- search, 1981, 11(1): 155-167.
10KEYES M R, GRIER C C. Above-and below-ground net production in 40-year-old Douglas-fir stands on low and high productivity sites[J]. Canadian Journal of Forest Re- search, 1981, 11(3): 599-605.