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棉花学报  2012 

去早果枝对转基因抗虫棉生长发育与衰老进程的调控效应

DOI: 1002-7807(2012)05-0399-07, PP. 399-405

Keywords: 去早果枝,抗虫棉,生长发育,衰老

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Abstract:

以转基因抗虫棉品种为材料,设置了2个播期和4种去早果枝方式(去基部1个、2个、3个果枝及不去果枝的对照)处理,研究去除早期果枝对棉花生长发育及衰老进程的影响。2年结果表明,去早果枝推迟了棉花的生育进程;去掉1个早果枝处理总果枝数与对照无差异,但去掉2个、3个果枝后明显低于对照,总果节数差异不显著;去早果枝显著提高了第1播期棉花叶面积指数和干物质积累量,去1个、2个和3个果枝处理的干物质积累量在2年中平均比对照高13.5%,17.5%,19.0%,但在第2播期差异不明显;去早果枝降低了第1播期棉花脱落率和烂铃率并提高了棉花的子棉产量,脱落率在2年中平均比对照降低4.5,5.8和9.0百分点,烂铃率平均降低2.2,4.5,4.8百分点;去1个和2个果枝处理的子棉产量在2年的第1播期中比对照平均高9.6%和8.1%,但在第2播期增产不明显,甚至减产。

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