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通过对福建三明36年生的格氏栲人工林和杉木人工林林木地下C分配(TBCA)进行研究,结果表明,由分室累加法直接测定的格氏栲和杉木人工林的TBCA分别为8.426和4.040 t C.hm-2.-a 1。在格氏栲和杉木人工林TBCA组成中,根系净生产量和根系呼吸各约占50%;在根系年净生产量中,细根年净生产量和粗根年净生产量各约占75%和25%。而格氏栲和杉木人工林的细根年C归还量则均约占各自TBCA的1/3(分别为33%和36%)。在假设地下C库处于稳定状态时,由C平衡法计算的格氏栲和杉木人工林的TBCA(分别为6.039t C.hm-2.-a 1和2.987 t C.hm-2.-a 1)低于分室累加法,这与两种人工林地下C库尚未达到稳定状态有关。利用R a ich and N ade lhoffer全球模式方程推算的格氏栲和杉木人工林的TBCA(分别为9.771t C.hm-2.a-1和5.344 t C.hm-2.-a 1)则高于分室累加法,这与全球模式方程只是一种全球尺度规律有关。
The results showed that the TBCA of T. gossypii and Cunninghamia lanceolata plantations directly measured by compartment accumulation method were 8.426 and 4.040 t C.hm-2.-a 1. In the TBCA composition of Castanopsis kawakamii and Cunninghamia lanceolata plantations, the net root production and root respiration accounted for about 50% respectively. Among the net annual net root production, net production of fine roots and net annual production of coarse roots accounted for about 75% % And 25%. However, the fine root C return of C. gossypii and Cunninghamia lanceolata plantations each accounted for about one-third of their respective TBCA (33% and 36%, respectively). Under the assumption that the underground C-bank is in a stable state, the TBCA of C. arborealis and Cunninghamia lanceolata plantations calculated by the C equilibrium method (6.039t C.hm-2.-a1 and 2.987 t C.hm-2.-a 1) is lower than the sub-compartment accumulation method, which is related to the fact that the underground C pool of two plantations has not yet reached a steady state. The TBCA (9.771t C.hm-2.a-1 and 5.344t C.hm-2.-a 1) of C. fortunei and C. plantation estimated using the global model equations of Rhich and N ade lhoffer Higher than the compartment accumulation method, which is related to the global model equation as a global scale law.