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超高产水稻品种的根系分布特点

DOI: 10.7685/j.issn.1000-2030.2000.04.002, PP. 5-8

Keywords: 水稻,根系分布,根重密度,深根系,根箱

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Abstract:

利用不同类型水稻品种和组合,采用根箱钉板法研究了全量根系在土壤中纵向和横向的分布特征。结果表明,根系生物量的52%～63%分布在0～12cm土层中,70%～79%分布在0～24cm土层中。后期耐早衰的协优9308表现根系生物量大,深根系比例高。根系横向分布随土壤深度增加,趋向离开植株中心分布。根系重量密度以表层最高,并随深度增加逐渐下降。协优9308在表土层以下的根系重量密度比其他品种明显提高。

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