【摘要】 大气CO₂浓度逐步升高对于不同取食方式的植食性昆虫有着不同的影响。目前,大气CO₂浓度逐步升高对刺吸式口器昆虫连续世代的直接和间接影响未见系统研究。本试验研究了实验室条件下不同CO₂浓度（对照浓度360μL/L和处理浓度720μL/L）对连续3代棉蚜的繁殖和死亡及棉蚜体内主要代谢物质的直接和间接影响。结果显示:（1）直接影响:大气CO₂浓度升高对连续3代棉蚜的繁殖和死亡的直接影响不显著,但高浓度（720μL/L）CO₂环境中饲养的棉蚜体内总糖与总蛋白的含量显著高于对照（360μL/L）CO₂处理。（2）间接影响:取食720μL/L CO₂环境下生长的棉叶,每一个世代棉蚜的繁殖数都显著高于对照（取食360μL/L环境下生长的棉叶）,但死亡率与对照相比无显著差异。棉蚜体内总糖的含量显著高于对照,但是总蛋白的含量显著低于对照。试验结果表明CO₂浓度升高对棉蚜无直接影响;主要通过改变寄主植物的营养物质而对棉蚜产生间接影响。CO₂浓度升高会导致棉蚜种群的增长。更多还原

【Abstract】 Elevation of atmospheric CO₂ concentration has different effects on insects with different feeding ways.There is no systematic study about the direct and indirect effect of CO₂ concentration elevation on the piercing sucking insects.The direct and indirect effects of elevated atmospheric CO₂ concentration（720μL/L）on the reproduction,survival and some key metabolites of the three consecutive generations of cotton aphid were investigated in this study.The results showed that the atmospheric CO₂ concentration had little direct impact on reproduction and death of the three consecutive generations of cotton aphid.After fed on the cotton leaves in the growth cabinet containing 720μL/L of CO₂,the content of sugar and protein was significantly higher than that of the control.The reproduction number of every generation was significantly higher than that of the control,but the mortality rate has no significant difference.After fed on the leaves of cotton planted in the environment containing 720μL/L of CO₂,the content of sugar was significantly higher than that of the control and the content of protein was significantly lower than that of the control.The results indicate that elevation of atmospheric CO₂ concentration has little direct impact on cotton aphid population,but has significant indirect impacts through changing the nutrients of the host plants.更多还原