贵州岩溶山区混播草地昆虫群落的多样性

摘要

Sweeping method and pitfall traps were employed to study on seasonal dynamics of insect community diversity in legume-grass mixed sowing grassland in Dushan in Guizhou to raise the level of integrated pest management of mixed artificial grassland.The results showed that insect community in mixed artificial grassland has a high diversity and stability and Its diversity kept at a high level from April to October,but sharply declined in November,superiority pests' control were required in November.There was obviously correlation between Shannon-wiener index and Pielou index,but negative correlation between Shannon-wiener index and Simpson index,temperature variation took an obviously influence to Shannon-wiener index,Pielou index and Margalef index of insect community,meanwhile,there was no important effects on Shannon-wiener index,Pielou index and Margalef index of insect community by precipitation variation.%为提高人工混播草地害虫综合治理水平,采用网捕法和陷阱法对贵州独山县豆禾混播草地昆虫群落多样性的季节性动态变化进行研究.结果表明:混播草地昆虫群落具有较高的多样性和稳定性,其多样性在4 10月均能保持较高水平,11月多样性水平显著降低,需加强对优势害虫种群的防控工作.昆虫群落多样性指数与均匀度指数呈显著正相关,而与优势度指数呈显著负相关;昆虫群落多样性、均匀度和丰富度与温度的变化关系紧密,受降水量影响较小.