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林业科学 ›› 2006, Vol. 42 ›› Issue (9): 74-78.doi: 10.11707/j.1001-7488.20060914

• 论文及研究报告 • 上一篇    下一篇

固原退耕还林区经济林木甘肃鼢鼠防治经济阈值研究

杨学军1 韩崇选1 李继光2 张宏利1 王明春1   

  1. 1.西北农林科技大学国家林业局黄土高原林木培育重点实验室,杨凌712100;2.宁夏回族自治区固原市原州区林业局,固原756000
  • 收稿日期:2004-12-21 修回日期:1900-01-01 出版日期:2006-09-25 发布日期:2006-09-25

Study on the Economic Threshold Value for Zokor Control of Economic Forest in Guyuan Replacing Agriculture by Afforestation

Yang Xuejun1,Han Chongxuan1,Li Jiguang2,Zhang Hongli1,Wang Mingchun1   

  1. 1.Northwest Sci_Tech University of Agriculture and Forestry Key Laboratory of Silviculture on the Loess Plateau of State Forestry AdministrationYangling 712100; 2.Forestry Burean of Yuanzhou District,Guyuan, Ningxia Hui Autonomous Region Guyuan 756000
  • Received:2004-12-21 Revised:1900-01-01 Online:2006-09-25 Published:2006-09-25

摘要:

对固原退耕还林区经济林木鼠害情况进行调查。结果表明:林木死亡率与鼢鼠密度之间呈显著相关关系:y=-1.923 4 +3.432 0x(r=0.934 8)。根据退耕还林区鼢鼠对不同定植年限山杏林木的危害造成的损失、防治费用和林木价格等,研究了固原地区退耕还林区经济林木鼢鼠防治阈值,并确定山杏定植1年时防治阈值为1.907只·hm-2,定植2~4年时为0.989~1.273只·hm-2,定植4~6年时为0.859 ~0.989只·hm-2。同时,以林木被害率和鼠口密度为指标,确定了退耕还林区经济林木鼠害程度划分标准。

关键词: 退耕还林, 经济林, 鼢鼠, 经济阈值

Abstract:

It was investigated the harm of zokor for economic forest in Guyuan replacing agriculture by afforestation, the result showed that there was a marked correlative relation between the zokor density and the death rate of forest, y=-1.923 4+3.432 0x(r=0.934 8). On the basis of the losses of economic forest to various planting years damaged by zokor, the control cost, the tree price of almond etc., the control economic threshold value of zokor for economic forest was put forward. When the age of forest planted is 1 year, the control economic threshold value (density of zokor) is 1.907 ind·hm-2 , when the age ranges form 2~4, the density is 0.989~1.273 ind·hm-2 , when the age ranges form 4~6, the density is 0.859~0.989 ind·hm-2 . According to the zokor density and the death rate of forest. The author established the divisiory standard of zokor harm to economic forest in replacing agriculture by afforestation.

Key words: replacing agriculture by afforestation, economic forest, zokor, economic threshold value