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萧氏松茎象种群发生与植被盖度的关系
引用本文:罗永松,肖活生,孙江华. 萧氏松茎象种群发生与植被盖度的关系[J]. 昆虫知识, 2004, 41(4): 367-370
作者姓名:罗永松  肖活生  孙江华
作者单位:1. 赣州市森林病虫害防治站,江西,赣州,341000
2. 赣州市林业科学研究所,江西,赣州,341000
3. 中国科学院动物研究所,农业虫害鼠害综合治理国家重点实验室,北京,100080
基金项目:国家林业局重点课题资助项目(编号:2001-22).
摘    要:在江西赣州发生萧氏松茎象HylobitelusxiaoiZhang危害的松林内 ,对不同虫株率松林灌木层群落多样性和植被盖度进行测定 ,在此基础上对松林的虫株率分 3次 ( 1 1月 ,次年 5月和次年 8月 )进行调查 ,最后结合各调查因子组建了萧氏松茎象种群发生量预测模型 ,植被盖度与虫口密度间存在显著相关性 ,虫口密度随植被盖度降低而减少 ,不同月份间虫口密度间均达到极显著水平。进一步对各因子进行多元回归分析 ,得到线性回归方程 :Y =-2 0 62 6+1 41 7T2 +0 2 3 3T1 -0 1 4 1G ;逐步回归分析得到最优回归方程Y=-0 0 91 1 +1 2 5 82 ,R =0 992 ,P <0 0 1。由逐步回归方程可知 ,次年 5月份虫口密度与次年 8月份虫日密度关系最为密切。

关 键 词:萧氏松茎象  多样性指数  植被盖度  预测模型

The occurrence of Hylobitelus xiaoi and its relationship with vegetation cover
LUO Yong-Song,XIAO Huo-Sheng,SUN Jiang-Hua. The occurrence of Hylobitelus xiaoi and its relationship with vegetation cover[J]. Entomological Knowledge, 2004, 41(4): 367-370
Authors:LUO Yong-Song  XIAO Huo-Sheng  SUN Jiang-Hua
Affiliation:LUO Yong-Song1,XIAO Huo-Sheng2,SUN Jiang-Hua 3**
Abstract:Biodiversity index, infestation and vegetation cover were used as factors in forecasting Hylobitelus xiao Zhang population in Ganzhou, Jiangxi Province. The model established and field observation showed that vegetation cover is closely related to beetle attack with vegetation cover reduction resulting in decreasing beetle attack. Regression analysis resulted in a model revaling relationship between beetle density and vegetation cover: Y=-20^626 1^417T-2 0^233T-1-0^141G; further a stepwise regression Y=-0^0911 1^258T-2 showing closeness between beetle density in August and May.
Keywords:Hylobitelus xiao   biodiversity index   vegetation cover   model forecasting
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