转基因抗虫棉对土壤无脊椎动物群落的影响

选择连续种植传统非转基因棉、5年连续种植转基因抗虫棉和10年连续种植转基因抗虫棉的棉田为研究对象,调查了土壤0～20 cm的小型无脊椎动物的群落组成和多样性变化.结果表明,与种植传统非转基因棉相比,种植转基因抗虫棉对土壤小型无脊椎动物的种类和数量等没有显著性差异,但减少了双翅目的优势种群.种植5年转基因抗虫棉会降低土壤无脊椎动物的Simpson指数、Shannon-Wiener多样性指数和Pielou均匀度.

Effects of Transgenic Pest-Resistant Cotton on Soil Invertebrate Communities

Traditional(non-transgenic) cotton,5th year transgenic resistant-pest cotton and 10th year transgenic pest-resistant cotton were selected to investigat the population and number of soil invertebrates in depth of 0~20 cm.Results showed that there was no significant differences in the quantity of soil small invertebrates between transgenic pest-resistant cotton and conventional cotton,but transgenic pest-resistant cotton decreased the dominant species of diptera.However,5th year transgenic pest-resistant cotton decreased the Simpson,Shannon-Wiener diversity indexes and pielou evenness index of the soil small invertebrates compared with conventional cotton.