在人工饲料中添加不同浓度的Zn2+连续胁迫3个世代的斜纹夜蛾Spodoptera litura Fabricius幼虫,采用等离子体原子发射光谱仪检测分析了连续3个世代6龄幼虫肠道不同部位对食物中Zn2+的积累作用。结果表明,Zn2+可在六龄幼虫前、中和后肠中积累,积累量受到食物中Zn2+的浓度和胁迫世代数的双重影响。每个世代6龄幼虫前肠、中肠和后肠中的Zn2+含量均随着饲料中Zn2+浓度增加而增加。六龄幼虫肠道3个不同部位对Zn2+的积累作用依次为前肠<中肠<后肠。而随着胁迫世代数的增加,不同世代6龄幼虫前肠、中肠和后肠中的Zn2+含量表现出显著减少的趋势。因此,植食性昆虫消化道不同部位对食物中Zn2+的积累作用有所不同,并随着胁迫世代数的增加而显著减少。 The three generations of Spodoptera litura Fabricius larvae were inoculated with different concentrations of Zn2 + in artificial diet, and the accumulation of Zn2 + in food by different parts of the intestine of 6th instar larvae was detected by plasma atomic emission spectrometry . The results showed that Zn2 + could accumulate in the intestine before, during and after the sixth instar larvae. The accumulation of Zn2 + was influenced by the concentration of Zn2 + in the food and the generation number of stress. The Zn2 + contents of foregut, midgut and hindgut of 6th instar larvae of each generation increased with the increase of Zn2 + concentration in feed. The accumulation of Zn2 + in three different parts of intestinal tract of sixth instar larvae was foregut