摘要
西南桦（Betula alnoides Buch.-Ham.Ex D.Don）是我国热带南亚热带地区的一个优良乡土阔叶树种,在云南、广西、广东等地被广泛应用于珍贵用材林基地建设,是该区域造林面积最大的乡土阔叶树种之一。西南桦木材可用于制作木地板、高档家具以及室内装饰等,而且人工林具维持生物多样性、涵养水源、保持地力以及较高的固碳能力等优良生态特性,在用材林、生态公益林等建设中具有重要的地位和发展潜力。
Betula alnoides Buch.-Ham.Ex D.Don is a fast-growing and precious tree species in tropical and warm subtropical regions.The wood borer damage has recently been one of key factors limiting the large-scale expansion of B.alnoides plantations.A trial including 26 provenances and 322 families were established at Shaoguan State-owned Forest Farm in northern Guangdong Province,which were suffered from heavy damage of wood borers within two years after planted.The growth performance and resistances to wood borers of B.alnoides were investigated for the purpose of early selection of germplasm.The results showed that there were significant differences among provenances in height and base diameter（P0.05）,which was on average about 4.3 m and 6.5 cm,respectively for two-year-old B.alnoides.Anoplophora chinensis（Frster） was the principal species of wood borer,which damaged trunk within the height of 20 cm above stem base.1-5 larva of this species were found on each tree attacked,and the attack rate by A.chinensis was significantly and positively related to the diameter growth（P0.05）.The attack rate showed no significant difference among provenances（P0.05）,and the mean attack rates for one-year-old and two-year-old B.alnoides trees were 48.21% and 36.27%,respectively.Early selection of B.alnoides provenance was carried out based on its growth performance and the attack rate by the wood borers.These findings could be contributive to understand the occurrence of A.chinensis,protect from its damage,and provide evidences to select germplsm of B.alnoides with good growth performance and strong resistance to A.chinensis in northern Guangdong and surrounding areas with similar environment.
出处
《林业科学研究》
CSCD
北大核心
2011年第6期768-773,共6页
Forest Research
基金
国家林业局重点项目"西南桦良种选育与蛀干害虫营林控制技术研究"(2006-02)
国家"十一五"科技支撑专题"西南桦用材林高效培育技术"(2006BAD24B09-02C)
关键词
西南桦
星天牛
早期选择
Betula alnoides Buch.-Ham.Ex D.Don Anoplophora chinensis（Frster） early selection provenance selection
