应用“模式森林经营体系研究”的调查资料，分析了巨尾桉、杉木、马尾松纯林以及杉木与巨尾桉、火力楠、米老排、马尾松混交等几种闽南地区常见的速生林分类型生物多样性和碳汇能力，结果表明：巨尾桉纯林、杉木×巨尾桉混交林林下植被丰富，碳汇能力强，年净吸收CO2量分别达33．51和27．59t·hm-2，是很好的有利于生物多样性保护的工业原料林和碳汇林；杉木与火力楠、米老排、马尾松等混交林及集约经营杉木林碳汇能力也较强，是较好的速生用材林和碳汇林；杉木×马尾松混交林生物多样性低的问题可以通过营林措施改善。%With data obtained from the project "Study of Scheme Forest Operation System", this study com- pared the biodiversity and carbon sink capacity among pure stands of Eucalyptus grandis x E. urophylla, Cun- nlnghamlalanceola and Plnus massonlana. Mixed stands of Cunnlnghamlalanceolata with Eucalyptus gran- dis x E. urophylla , Michelia macclurei , Mytilaria laosensis or Plnus massonlana were also compared. The re- suits showed that pure stands of Eucalyptus grandis x E. urophylla and mixed forest of Cunnlnghamlalanceola- ta with Eucalyptus grandis x E. urophylla had abundant undergrowth species and a high carbon sink capaci- ty, for which net absorption of CO2 could reach 33.51 and 27.59 t ~ hm-2. y-t. As well as their high car- ben sink capacity, these stands also performed well for biodiversity protection and timber production; thus they could be considered the best stand types for industrial raw material production. Mixed stands of Cunnlng- hamia lanceolata with Michelia ma~clurei, Mytllarlalaosensls and Plnus massonlana and stands of intensive- ly managed Cunnlnghamlalanceola~a rated well for just fast - growing timber production and their carbon sink capacities. The low biodiversity found in these mixed stands of Cuanlnghamlalanceolata and Plnus masso- nlana could be increased by management practices.
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