首页   按字顺浏览 期刊浏览 卷期浏览 Height growth recovery and crown development in top‐damagedPinus sylvestristrees
Height growth recovery and crown development in top‐damagedPinus sylvestristrees

 

作者: Bo Långström,   Claes Hellqvist,  

 

期刊: Scandinavian Journal of Forest Research  (Taylor Available online 1992)
卷期: Volume 7, issue 1-4  

页码: 237-247

 

ISSN:0282-7581

 

年代: 1992

 

DOI:10.1080/02827589209382716

 

出版商: Taylor & Francis Group

 

关键词: Scots pine;Tomicus piniperda;leader damage;growth loss.

 

数据来源: Taylor

 

摘要:

Leader shoot damage was imposed on young Scots pines (3 m high) in four ways: by caging the uppermost whorl including the leader shoot with 10 pine shoot beetles; by caging the two uppermost whorls with 20 beetles; by topping the tree below the 1984 whorl; by topping the trees as above and removing all current shoots in whorl 1983. Six years later, top‐damaged trees were still significantly shorter than undamaged controls, although the annual height growth rate had recovered to the pre‐damage level within 3 years. Recovery occurred in two ways: lateral branches from the nearest intact whorl took dominance over the damaged leader or secondary branches developed from interfascicular buds on the damaged leader shoot. Approximately one and two years of height growth were lost in the former and latter case, respectively. Only 5 of the 34 top‐damaged trees escaped technical defects (crooks and/or vertical branches). Stem diameter and crown development were slightly affected.

 

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