不同长势烤烟田节肢动物群落结构与动态分析

Community Structure and Dynamics of Arthropod in Different Growing Trend Tobacco Fields

为了掌握旺长期到成熟期不同长势烤烟田节肢动物群落结构与动态,通过调查相同生境下3种不同长势的烤烟田节肢动物群落,运用群落生态学原理和方法比较分析。结果表明,烤烟害虫有2纲4目5科,天敌有2纲5目5科,其中温室白粉虱和烟蚜为主要有害生物,中华草蛉是天敌中的优势种;在节肢动物总个体数上,长势好的烤烟大于长势居中的烤烟和长势差的烤烟;群落丰富度(S)、优势集中性(C)、多样性(H′)和均匀度(E)的时序动态3种烟田均不同,长势好的烤烟各指数均表现为高-低-高,长势居中的烤烟在优势集中性(C)、多样性(H′)和均匀度(E)表现为低-高-低,其群落丰富度(S)表现为低-高,长势差的烤烟各指数均表现出2个高峰2个低谷。

The study was done to master the community structure and dynamics of arthropod in different growing trend tobacco fields from vigorous growth period to mature period.the arthropod community was investigated in three different growing trend tobacco fields,and comparative analysis was conducted using the community ecology principles and methods.The results indicated that there were 5 families pests belonging to 4 orders and 2 classes and 5 families natural enemies belonging to 5 orders and 2 classes,among which greenhouse whitefly and tobacco aphis were major pests,and Chinese green lacewing was the dominant species in natural enemies.The number of arthropod in the best growing tobacco field was bigger than the other two fields.The temporal dynamics of the richness,dominant concentration,diversity and evenness were different in the three samples：all the indexes had a trend of high-low-high in the best growing field;in the mid-growing trend field the dominant concentration,diversity and evenness had a trend of low-high-low,and the richness showed a trend of low-high;in the worst growing field all the indexes showed 2 peak and 2 trough.