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棉花学报  2010 

长江下游棉区抗虫杂交棉适宜密度研究

DOI: 1002-7807(2010)06-0634-05, PP. 634-638

Keywords: 棉花,密度,群体结构,生长特性,产量

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Abstract:

以湘杂棉8号为材料,于2008-2009年在南京研究了不同密度对杂交棉群体结构、光合势、干物质积累量与分配、产量的影响。结果表明盛铃期以前,棉花叶面积指数、光合势、群体生长率随密度的提高显著增大,之后,高密度(3.9万株·hm-2以上)棉花的叶面积指数、光合势与群体生长率均较低,且铃数与铃重也降低,难以获得高产。综合分析,长江流域下游棉区抗虫杂交棉适宜密度为3.0万株·hm-2左右。

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