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我国南亚热带珍优乡土阔叶树种大径材人工林的培育

On Large-size Timber Plan ta tion Forestry of Va luable HardwoodSpec ies inWarm Sub-tropical Areas of China

  • 摘要: 在我国南亚热带地区培育珍优阔叶树种大径材人工林,可以兼顾珍贵用材生产和生物多样性保护、生态效益最大化追求、森林生态系统稳定性维持,实现森林可持续经营。近20余年的研究和实践增进了人们对珍优乡土阔叶树种的了解,必须重新评价其林学特性和重要性。经营珍优乡土阔叶树种大径材人工林的关键技术环节在于:依据生境异质性和树种特性细致规划林地,使用良种壮苗,适时调控林分密度,运用多树种混交,通过抹芽修枝培育无节良材,实施择伐和林隙更新保证森林生态系统稳定。本文以红椎为例,对经营珍优乡土阔叶树种的经济效益进行了概算,并提出了珍优阔叶树种大径材培育的未来优先研究方向。

     

    Abstract: Large-size timber p lantation of valuable hardwood species can combine high-quality hardwood p roductionwith biodiversity conservation and great pursuit on ecological benefit and stability of forest ecosystem, and successfully achieve forest sustainable management. In the past two decades much more attentions have been paid to research on a number of valuable hardwood species and p romote greatly understanding about their biological and ecological characteristics, thus their forestry regimes and importance should be re-assessed. The key techniques for develop ing large-size timber plantations of valuable hardwood species are: (1) to plan forested lands considerably onthe basis of habitat heterogeneity and species characteristics; (2) to use elite seeds and sap lings; (3) to controlstand density in time; (4) to establish mixed forestswith two ormore species; (5) to p roduce knot-free timber byp runing; and (6) to regenerate in gap s formed by harvesting selectively so as to keep forest ecosystem stable. Economic benefits for develop ing valuable hardwood specieswere also calculated taking Castanopsis hystrix as examp le.And the p riority in the fields of research on large-size timber p lantation forestry of valuable hardwood species hasbeen pointed out.

     

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