我国西南桦研究的回顾与展望
Domestication of Betula alnoides in China: Current Status and Perspectives
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摘要: 西南桦是我国热带、南亚热带地区的一个优良乡土阔叶树种,具有重要的生态和经济价值,目前推广面积已逾5万hm2,且仍呈良好的发展势头,已成为该地区造林面积最大的乡土阔叶树种。本文从生物学生态学特性,栽培技术,种质资源的收集、保存与应用以及人工林生态效益等方面回顾了我国以往西南桦的研究工作,评述了西南桦人工林大规模发展过程中出现的问题,并就其解决办法提出建议,据此提出了未来优先研究方向。Abstract: Betula alnoides Buch.-Ham.ex D.Don is an indigenous hardwood species in tropical and warm subtropical zones in China.It is of great ecological and economic value,and is the most popular native hardwood species in these zones with plantation area more than fifty thousand hectare up to date.Here previous studies on B.alnoides are reviewed at aspects of biological and ecological properties,cultivation techniques,collection,conservation and utilization of genetic resources,and ecological benefits of plantations of this species.The common problems in the proceeding of its plantation development are also assessed.Priority is pointed out for further researches on this species.The aim is to accelerate researches on B.alnoides for sustainable development of its plantations.