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棉花学报  2014 

转基因抗草甘膦抗虫棉田害虫群落多样性季节动态研究

DOI: 1002-7807（2014）02-0105-08, PP. 105-112

Keywords: 转基因抗草甘膦抗虫棉,害虫群落,生物多样性,优势集中性指数,均匀性指数

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Abstract:

为了明确转基因抗草甘膦抗虫棉对棉田害虫群落多样性的影响，于2010－2012年，在田间隔离条件下，采用直接观察法，分析比较多样性指数、优势集中性指数、均匀性指数、优势种和优势度等相关参数。结果表明，在6月中下旬及7月中下旬至8月上旬，转基因抗草甘膦抗虫棉田害虫群落多样性指数和均匀性指数显著高于常规棉，而其优势集中性显著低于常规棉；与Bt棉相比，二者在同时期的害虫群落参数变化趋势基本一致，差异不明显。3种棉田在其他时段的群落参数变化趋势一致，无明显差异。同时，转基因抗草甘膦抗虫棉田的优势害虫种类比较稳定；因此，种植该双抗棉对棉田害虫群落结构的影响较小，不会扰乱害虫群落的稳定性。

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