中文摘要：

为给小麦优质高效安全生产中科学使用杀虫剂提供理论和技术依据,以弱筋小麦扬麦13、强筋小麦烟农19为材料,在开花末期分别喷施推荐、3倍、6倍剂量的阿维菌素、毒死蜱、吡虫啉、乐果4种杀虫剂,研究其对小麦旗叶光合及叶绿素荧光特性的影响。结果表明,杀虫剂处理会改变小麦旗叶的SPAD值、光合速率及叶绿素荧光特性,且剂量越高影响越明显;不同类型杀虫剂对小麦光合速率及荧光特性的影响程度不同,影响较大的杀虫剂是吡虫啉和乐果,其次是毒死蜱,最后是阿维菌素;不同小麦品种对杀虫剂的耐受性不同,弱筋小麦扬麦13比强筋小麦烟农19的耐受性强。杀虫剂处理主要是通过降低叶片叶绿素含量、光系统Ⅱ的实际光化学效率(ΦPSⅡ)和光化学荧光淬灭系数(qP),引起单叶光合速率下降,最终导致小麦产量降低。

英文摘要：

The effects of spraying pesticides on photosynthesis and chlorophyll fluorescence of flag leaves in winter wheat were investigated.Two winter wheat(Triticum aestivum L.)varieties,weak-gluten wheat Yangmai13,strong-gluten wheat Yannong 19,were sprayed with four widely-used pesticides,avermectin,chlorpyrifos,imidacloprid and dimethoate,with 1,3 and 6 times of standard dosage of each pesticide at the end of anthesis stage.The chlorophyll content(SPAD value),net photosynthetic rate and chlorophyll fluorescence ...