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棉花学报  2012 

施钾对不同转基因棉花品种光合特性及产量和品质的影响

DOI: 1002-7807(2012)06-0548-06, PP. 548-553

Keywords: 钾肥,转基因棉花,光合特性,产量,品质

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Abstract:

在田间试验条件下,研究了施钾对转Bt+CpTI基因抗虫棉中棉所41、转Bt基因抗虫棉国抗1号和常规棉泗棉3号光合特性和产量及品质的影响。结果表明,施用钾肥能不同程度地提高不同转基因棉花品种的叶绿素含量、叶面积指数(LAI)、叶片净光合速率(Pn)、气孔导度(Gs)、叶绿素荧光动力学参数PSⅡ、最大光化学量子效率(Fv/Fm)、PSⅡ潜在光化学活性(Fv/Fo),从而提高棉花叶片的光合性能。施钾还提高了转基因棉花干物质量及分配到生殖器官的比例,增加了棉花总成铃数、铃重和衣分;施钾处理的中棉所41、国抗1号和泗棉3号的皮棉产量较未施钾处理分别增加5.8%,11.8%和7.0%,棉纤维的主要品质指标也得到改善。转Bt基因抗虫棉国抗1号比转Bt+CpTI基因抗虫棉中棉所41和泗棉3号对钾肥更为敏感。

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