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BARK—STRIPPING DAMAGE T0 FOREST TREESBY RED-BELLIED TREE SQUIRREL(Callosciurus erythaeus)IN ZHEJIANG PROVINCE

ZHU Yongdan, ZHANG Weiyang ,ZHU Xi   

  • Online:2006-07-26 Published:2007-09-13

赤腹松鼠(Callosciurus erythraeus)对林木剥皮危害的初步研究

朱永淡,张卫阳,朱曦   

  1. 浙江省浦扛县林业局

Abstract: Zhejiang Province lies on the coast of the East sea,with a mild climate and plentiful rainfall,typical of the north sub- tropical monsoon climate.Squirrel damage to trees in this area is of two types: (1)by eating the nuts and seeds.(2)by bark -strip-ping.
There are 47 bark-stripping tree species ty squirrel,including Pinus massoniana, Cunninghamia lanceolata,Crypotomeria fortunei,Schima superba,Pinus elliotii,Meta—sequoia glyptostroboides,Cupressus funebris,Melia azedarach,Paulownia fortunei,Ca—stanea mollitssima,Ginkgo biloba,Phyllotachys spp.etc.
The main damaging squirrel species were found to be Callosciurus erythraeus styani Thomas.
A total of 12947 trees on the 759 spots were surveyed in Zhejiang from August, 1987 to September,1989.The mean damage ratiowas 54.44% and the death ratio was 7.24%.Squirrel stripping damage to tress starts in the late autumn,and usually occurs in January,Februaxy and March.
The cause of squirrel stripping damage may be related to unrich food.The most serious damage to China fir(Cunninghamia lanceolata) occurs in trees aged 14- 16 years and in Massons pine (Pinus massoniana)aged 10- 20 years.In this paper,the causes of squirrel damage,the relationship between the occuring damsge,forest types and effects of forest composition on the squirrel damage were discuesed.

Key words: Squirrel, Sciurus carolinensis, Callosciurus erythraeus styani, Bark-stripping damage, Red-bellied tree squirrel control

摘要: 浙江省被松鼠剥皮危害的树木有马尾松、杉木、柳杉、湿地松、银杏等计47种, 以针叶树最严重。危害林木f的主要种类为赤腹松鼠嘉兴亚种(callosciurus erythraeus styani)。据1987—1989年在759块标准样地12947株树木调查,平均被害率为54.44% ,被害树木中死亡的占13.3%。
松鼠剥食树皮从秋季开始,以2-3月最严重,这与此时松鼠食物供应不足有关。松鼠剥皮危害程度也与林分组合有关,混交林较单纯林受害率低。此外与食物供需丰歉也有关系。

关键词: 松鼠赤腹松鼠嘉兴亚种, 剥皮危害, 松鼠害控制