ClO_4^-与As^(5+)复合污染对斜纹夜蛾食物利用的影响  

Effect of compound contamination of arsenate and perchlorate on food utilization of Spodoptera litura

作　　者：秦俊豪[1,2] 顾忱[1,2] 舒迎花[1,2] 王登科[1,2] 李君菲[1,2] 温莹[1,2] 黎华寿[1,2] 

机构地区：[1]华南农业大学农业部华南热带农业环境重点实验室,广州510642 [2]华南农业大学农学院广东省高等学校农业生态与农村环境重点实验室,广州510642

出　　处：《生态科学》2013年第3期338-344,共7页Ecological Science

基　　金：国家重点基础研究"973"项目(2011CB100406);国家自然科学基金项目(41271479)

摘　　要：通过在人工饲料中添加不同浓度组合的ClO4-与As5+,研究ClO4-与As5+复合污染对斜纹夜蛾食物利用的影响。结果表明:第1 d时,对照A0B0的相对生长率RGR为2.23%,最高A1B3的RGR为3.75%,显著高于其他处理,最低A3B5的RGR为1.01%;第3 d时,A3B4的食物消化率ECI和消化转化率ECD在所有处理组合中最低:分别为28.61%和36.29%。而第5 d时A3B1-A3B5仍然具有较高的近似消化率AD。由此可知,在低浓度As5+作用的ClO4-与As5+复合污染会促进斜纹夜蛾幼虫的生长,但是当As5+过高时的复合污染,便会抑制其生长。究其原因在于低浓度复合污染胁迫下,斜纹夜蛾幼虫提高了对食物的利用和转化能力,以获取更多营养供幼虫生长需要。而高浓度ClO4-与As5+复合污染胁迫可能扰乱昆虫取食行为,阻碍其生长发育。这对进一步揭示ClO4-与As5+复合污染对斜纹夜蛾的毒理效应和机理研究具有指导意义。Spodoptera litura larvae were exposed to different concentrations of CA （compound contamination of C104 and As5＋） in the artificial diets, and the effects of CA on the food utilization of S. limra were investigated. The results showed that the highest RGR of A1B3 was 3.75% and showed significantly difference among treatments on the 1st day. The lowest of A3B5 was 1.01% and the control of AOB0 was 2.23%. On the 3rd day, the lowest ECI and ECD of A3B4 were 28.61% and 36.29%, respectively. However, the treatments of A3B1 to A3B5 still had higher AD on the 5th day. The growth of insect larvae could be stimulated by CAunder low concentrations of As5＋, but inhibited by CA under high concentrations of As5＋. Furthermore, the food utilization and transformation ability of larvae were improved in order to intake more nutrition for larvae growth in low CA. In contrast, the high CA inhibited larvae growth and disturbed feeding behavior. These results will provide guide significance on the toxicological effects and mechanisms of CA on S. litura.

关 键 词：ClO4-与As5+复合污染 斜纹夜蛾 食物利用 

分 类 号：X503.223[环境科学与工程—环境工程]