【摘要】 对32年生楠木人工林生物量、碳含量、碳贮量及其空间分布进行测定。结果表明:楠木林分平均生物量为174.33t·hm-2,其中乔木层为166.73t·hm-2,占林分生物量的95.6%;楠木林分生态系统各组分碳含量为树干0.5769gC·g-1,树皮0.4654gC·g-1,树枝0.5232gC·g-1,树叶0.4958gC·g-1,树根0.4931gC·g-1,灌木层0.4989gC·g-1,草本层0.4733gC·g-1,苔藓层0.4143gC·g-1,枯落物层0.3882gC·g-1;土壤碳含量平均值为0.0139gC·g-1,随土层深度增加各层次土壤碳含量逐渐减少;楠木林分生态系统总碳贮量为227.59t·hm-2,其中乔木层91.33t·hm-2,占楠木林分生态系统总碳贮量的40.13%,灌木层0.38t·hm-2,只占0.17%,草本层1.71t·hm-2,占0.76%,苔藓层0.63t·hm-2,占0.28%,枯落物层0.66t·hm-2,占0.29%,林地土壤(0~80cm)碳贮量为132.88t·hm-2,占58.40%;其碳库空间分布序列为土壤(0~80cm)>乔木层>草本层>枯落物层>苔藓层>灌木层;楠木林分净生产量为8.5706t·hm-2a-1,其中乔木层净生产量为6.6691t·hm-2a-1,占林分总量的77.82%。楠木林分碳素年固定量4.2536t·hm-2a-1,其中乔木层碳素年固定量3.5736t·hm-2a-1,占林分总量的84.01%。更多还原

【Abstract】 The biomass, carbon content, carbon storage and their vertical distribution were measured in 32-year-old artificial stand of Phoebe bourmei. The results showed: The mean biomass is 174.33 t5hm~ -2 , in which the arber layer is 166.73 t5hm~ -2 accounting for 95.6%. The carbon content of stem, bark, branch, leaf, roof, shrub, herb, litchen and litter is 0.576 9, 0.465 4, 0.523 2, 0.495 8, 0.493 1, 0.498 9, 0.473 3, 0.414 3 and 0.388 2 gC5g~ -1 , respectively. The mean carbon content of soil which reduces gradually with the depth is 0.013 9 gC5g~ -1 . The total carbon storage of P. bourmei stand ecosystem, is 227.59 t5hm~ -2 , is devided into soil layer (0～80 cm) accounting for 58.40% (133.88 t5hm~ -2 ), tree layer accounting for 40.13% (91.33 t5hm~ -2 ), herb accounting for 0.76% (1.71 t5hm~ -2 ), litter accounting for 0.29% (0.66 t5hm ~ -2 ), litchen accounting for 0.28% (0.63 t5hm~ -2 ) and shrub accounting for 0.17% (0.38 t5hm~ -2 ). The tree layer productiong is 6.669 1 t5hm~ -2 a~ -1 which accounts for 77.62% of the mean net production (8.570 6 t5hm~ -2 a~ -1 ). The tree layer sequestration is 3.573 6 t·hm~ -2 a~ -1 which accounts for 84.01% of the mean annual carbon sequestration (4.253 6 t·hm ~ -2 a~ -1 ).更多还原