中文摘要：

为了阐明大气CO2浓度升高对西花蓟马种群动态的影响,利用人工气候箱研究了CO2浓度倍增条件下西花蓟马生长发育、繁殖及其寄主植物四季豆叶片营养成分的变化。结果表明：CO2浓度升高显著影响了四季豆叶片的营养成分含量,其粗蛋白含量明显下降,而总糖、组织淀粉、可溶性蛋白和游离氨基酸含量却显著升高。与对照CO2浓度（400!L·L-1）相比,800μL·L-1CO2浓度处理下的西花蓟马卵期、1龄若虫期、2龄若虫期的发育历期均显著缩短,而单雌平均产卵量增加了9.74%（P〈0.05）。高CO2浓度处理下西花蓟马的净生殖率（R0）、内禀增长率（rm）、周限增长率（λ）比对照依次升高了7.40%、8.86%和1.32%（P〈0.05）;而平均世代周期（T）、种群加倍时间（DT）比对照分别降低了1.42和0.38d（P〈0.05）。西花蓟马R0、rm、λ与四季豆粗蛋白含量呈显著负相关,而与总糖/粗蛋白、淀粉呈显著正相关;西花蓟马T、DT与四季豆粗蛋白含量呈显著正相关,而与总糖/粗蛋白、淀粉、游离氨基酸呈显著负相关。说明未来高CO2浓度的大气环境会改变四季豆叶片的营养成分,并影响西花蓟马的生长发育与繁殖。

英文摘要：

To investigate the effects of elevated atmospheric CO2 concentration on population dynamics of the western flower thrips（ Frankliniella occidentalis） and their host plant,kidney bean（ Phaseolus vulgaris）,this paper measured the growth,development duration and reproduction of the thrips and the leaf nutrients of their host plant in two different CO2 concentration chambers（ 800 vs. 400 μL·L-1）. The results indicated that the elevated CO2 concentration changed the nutritional ingredients of kidney bean leaves,which affected the growth,development,reproduction of F. occidentalis. High CO2 concentration significantly reduced the leaf gross crude protein contents（ GP） of kidney bean; however,the contents of total saccharides（ TSCs）,starch,and soluble protein and free amino acids of leaves were significantly enhanced. Compared with the control（ 400 μL·L-1CO2）,the egg stage,1st instar larva stage,2nd instar larva stage of F.occidentalis were significantly decreased in the doubled CO2 concentration treatment（ 800μL·L-1CO2）,yet the oviposition rate of individual female increased by 9.74%（ P〈0.05）. Under the higher CO2 concentration,the net reproductive rate（ R0）,intrinsic increase rate（ rm）,increase rate per unit（ λ） of F. occidentalis were increased by 7.40%,8.86% and 1.32%,respectively（ P 〈0. 05）. Compared with the thrips in 400 μL· L-1CO2 concentration chambers,the generation time（ T） and the time of doubling population size（ DT） of those in 800 μL·L-1CO2 concentration decreased by 1.42 and 0.38 d,respectively（ P〈0.05）. R0,rmand λ of F. occidentalis were proved to have negative correlation with the content of gross crude protein and positive correlation with TSCs / GP and starch of kidney bean leaf. In contrast,T,DT of F. occidentalis had significant positive correlation with the content of gross crude protein of P. vulgaris,and negative correlations were observed among T,DT of F. occidentalis and TSCs / GP,starch,free amino acids in leaf of P