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棉花学报  2011 

滨海盐碱地棉花熟相调控技术及其机理

DOI: 1002-7807(2011)05-0466-06, PP. 466-471

Keywords: 滨海盐碱地,棉花,盐胁迫,熟相

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Abstract:

熟相是指棉株吐絮成熟期的衰老表现,有正常成熟、早衰和贪青晚熟等熟相之分,实现正常熟相需要协调的库源关系和根冠关系。整枝、嫁接和环割等措施通过改变棉花库源关系和根冠关系,导致细胞分裂素和脱落酸含量发生变化,引起早衰或贪青晚熟等异常熟相。品种自身的遗传背景、栽培措施和外界环境等都可以改变库源关系、根冠关系及相关的植物激素平衡,从而影响棉花熟相。受渗透胁迫、离子毒害和营养障碍等因素的影响,滨海盐碱地棉花容易出现库源关系和根冠关系失调,引起早衰或贪青晚熟等异常熟相,并导致棉花产量和纤维质量下降。本文提出,选用对路品种,不断改良培肥盐碱地减轻盐离子毒害和营养障碍,合理密植、科学整枝和适时适度化控,是滨海盐碱地棉花获得正常熟相、优质高产的有效途径。

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