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棉花学报  2014 

不同基因型棉花磷效率特征及其根系形态的差异

DOI: 1002-7807(2014)06-0506-07, PP. 506-512

Keywords: 棉花,基因型,磷效率,根系形态

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Abstract:

在水培条件下，以棉花磷高效品种新海18号和低效品种新陆早13号为材料，研究不同供磷条件下其生物量、磷素积累量、根系参数的差异。结果表明，在低磷与适磷时，高效基因型新海18号的磷利用效率分别为1129.2g·g-1和262.7g·g-1，而低效基因型新陆早13号为1090.9g·g-1和123.0g·g-1；新海18号地上部分磷积累量占全株磷积累量的比例分别为57.5%和48.3%，新陆早13号分别是49.9%和53.8%。低磷时，新海18号总根长、根总表面积和根总体积分别增加36.0%、145.7%和96.9%，新陆早13号总根长和根总表面积则显著下降，新海18号根系各参数均高于新陆早13号。表明高效品种具有较强的磷素利用效率和较好的根系形态参数。

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