CO_2浓度倍增条件下泽兰实蝇寄生对紫茎泽兰生长和营养成分的影响  

The effects of Procecidochares utilis parasitism on growth and nutrition of Ageratina adenophora under doubled CO_2 concentration

作　　者：可芮 岳英 李胜 姜丽娜[1] 郭晋 和淑琪[1] 桂富荣[1,3] 

机构地区：[1]云南农业大学植物保护学院,昆明650201 [2]云南省农业环境保护监测站,昆明650034 [3]云南省高原特色农业产业研究院,昆明650201

出　　处：《环境昆虫学报》2017年第6期1281-1286,共6页Journal of Environmental Entomology

基　　金：国家自然科学基金(31660546;31260450);国家重点研发计划"生物安全关键技术研发"重点专项(2016YFC1202100);云南省科技人才培养计划项目(2013HB072)

摘　　要：利用人工气候箱设置两种CO_2浓度(400μL/L和800μL/L),在释放和未释放天敌泽兰实蝇两种情况下测定了紫茎泽兰的生长状况和营养成分。结果表明,在两种CO_2浓度下泽兰实蝇的寄生均可抑制紫茎泽兰的生长,但不同CO_2浓度下生长的紫茎泽兰株高、茎直径、节间距和各营养成分含量存在差异。在相同的寄生强度下,800μL/L CO_2浓度下生长的紫茎泽兰比400μL/L CO_2浓度下生长的紫茎泽兰的株高、节间距和茎直径分别增加了31.74%、6.70%和9.84%;CO_2浓度倍增条件下泽兰实蝇的寄生导致紫茎泽兰的游离氨基酸和淀粉含量显著降低(P<0.01),分别较对照降低了25.81%和11.76%;在800μL/L CO_2浓度下紫茎泽兰形成的虫瘿和羽化出下一代泽兰实蝇的数量也显著低于400μL/L CO_2浓度下的处理植株,说明CO_2浓度倍增条件下泽兰实蝇对紫茎泽兰的抑制效果减弱。研究结果可为预测全球气候变化下泽兰实蝇对紫茎泽兰的控制效应提供理论依据。The growth and nutrition of Ageratina adenophora were measured under two CO2 concentrations（ 400 μL/L VS 800 μL/L） with presence and absence of its natural enemy,Procecidochares utilis. The results showed that the growth of A. adenophora was inhibited with P. utilis parasitism under both CO2 concentrations,while there were differences with regard to the height,stem diameter,internodal distance and nutrient contents of A. adenophora between two CO2 concentrations. With the same parasitic intensity,the height,internodal distance and stem diameter of A. adenophora under 800 μL/L CO2 concentration increased 31. 74%,6. 70% and 9. 84%,respectively,comparing with those of A. adenophora planting under 400 μL/L CO2 concentration. Parasitism of P. utilis under 800 μL/L CO2 concentration might lead to significantly decrease of free amino acids and starch content of A. adenophora（ P 0. 01）. The number of galls and F1 emergence of P. utilis adults under 800 μL/L CO2 concentration were significantly lower thanthose of P. utilis adults under 400 μL/L CO2 concentration. The results indicated that the inhibitory effect of P. utilis on A. adenophora might be weakened under the doubled CO2 concentration,which would provide theoretical evidence for predicting the control capability of P. utilis parasitism on A. adenophora under the changing global climate.

关 键 词：CO2浓度 紫茎泽兰 泽兰实蝇 营养物质 

分 类 号：Q968.1[生物学—昆虫学] S476[农业科学—农业昆虫与害虫防治]