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棉花学报  2012 

长江流域棉花主推品种氮素吸收与利用效率比较与分类

DOI: 1002-7807(2012)03-0253-06, PP. 253-258

Keywords: 棉花,氮素,吸收效率,利用效率,子棉产量

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Abstract:

以长江流域推广应用的8个棉花品种为材料,探讨了品种间氮素吸收与利用效率的差异。结果表明参试品种氮素回收利用效率(RE)差异较大,变化幅度在29.0%~48.2%之间,且高氮素回收利用效率品种具有铃吸氮量、总吸氮量较高、茎叶吸氮量适宜的特征;氮素子棉生产效率(NUEsp)差异也较大,其中泗棉3号和科棉6号较高,分别为20.67kg·kg-1和20.35kg·kg-1。对不同品种RE进行聚类分析结果表明,参试品种可以分为3种类型类型Ⅰ,回收利用效率高效型;类型Ⅱ,回收利用效率中效型;类型Ⅲ,回收利用效率低效型。NUEsp聚类分析结果表明,不同品种可以分为2种类型类型Ⅰ,氮素子棉生产效率高效型;类型Ⅱ,氮素子棉生产效率低效型。进一步分析可知,参试品种RE与NUEsp存在4种类型即二者都高效型,二者都低效型,高NUEsp和低RE型以及低NUEsp和高RE型。

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