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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。
In order to clarify the effects of atmospheric CO2 concentration on the population dynamics of F. occidentalis, the growth and development of F. occidentalis and the changes of its nutrient elements in the leaves of the host plant Tetraria were studied by artificial climate chamber. The results showed that the increase of CO2 concentration significantly affected the nutrient content of Zizyphus jujuba, the content of crude protein decreased obviously, while the content of total sugar, tissue starch, soluble protein and free amino acid increased significantly. Compared with the control CO2 concentration (400! L · L-1), the developmental stages of F. occidentalis eggs, the first instar nymphs and the second instar nymphs were significantly shortened when treated with 800 μL·L-1CO2 The average fecundity per female increased by 9.74% (P <0.05). The net reproductive rate (R0), intrinsic rate of increase (rm) and weekly rate of increase (λ) of F. occidentalis increased by 7.40%, 8.86% and 1.32% respectively over the control under high CO2 concentration (P <0.05) ) While the average generation period (T) and population doubling time (DT) decreased by 1.42 and 0.38 d, respectively (P <0.05). R0, rm, λ of western flower thrips were significantly and negatively correlated with the content of crude protein in kidney beans, but positively correlated with the total sugar, crude protein and starch. The content of crude protein of T, DT and kidney beans in F. occidentalis was significantly positive Related to total sugar / crude protein, starch, free amino acids showed a significant negative correlation. It shows that the atmosphere with high CO2 concentration in the future will change the nutritional content of leaves of Zizyphusjupea and affect the growth and reproduction of F. occidentalis.