烟田地表的节肢动物群落结构特点

Characteristics of the Ground-dwelling Arthropod Community Structure in Tobacco Fields

在湖北省襄阳市保康县采用陷阱法调查了烟田地表节肢动物的组成及季节动态,结果表明,烟田地表的节肢动物有3纲43个类群,以蚱科(Tetrigidae)、螽斯科(Tettigoniidae)、鳃金龟科(Melol-onthidae)和叩甲科(Elateridae)等为优势害虫类群,以隐翅甲科(Staphilinidae)、蜘蛛目(Araneae)和步甲科(Carabidae)为优势天敌类群。在烟草移栽至旺长前期,害虫复合种群的密度很低,但天敌复合种群的密度达到最高;在烟草旺长期,害虫复合种群达到高峰,且天敌复合种群出现第2个高峰。烟田高程影响地表节肢动物群落结构,中海拔烟田的节肢动物数量加大。烟田地表的节肢动物群落较为独特,与烟草冠层和地下的节肢动物群落结构存在明显差异。

A pitfall trap survey was made in tobacco fields to investigate the composition and seasonal dynamics of the ground-dwelling arthropod in Baokang County of Xiangyang City,Hubei Province.The results showed that a total of 43species or groups of 3arthropod classes were collected and determined in the community,of which,Tetrigidae,Tettigoniidae,Melolonthidae and Elateridae were the dominant arthropod pest,and Staphilinidae,Araneae and Carabidae were the dominant natural enemies.In the early stage of tobacco growth,the complex population of the arthropod pest was still low while the density of the natural enemy reached to the complex population peak.During the tobacco vigorous growing stage,the arthropod pest reached the complex population peak,and the natural enemies reached to the second population peak.The altitude of tobacco field influenced the structure of the ground-dwelling arthropod community with more abundant arthropods in median-altitude tobacco field than that in high-altitude.It indicated that the community structure of gound-dwelling arthropod in tobacco field was unique,and had obvious differences to canopy and underground of tobacco field.