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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低磷胁迫对水稻地上部钙、镁吸收和积累的影响
DOI: 10.3724/SP.J.1145.2009.00295, PP. 295-300
Keywords: 低磷胁迫,水稻,基因型,钙,镁,生育期
Abstract:
摘？要？采用盆栽试验系统研究了低磷(p)胁迫条件下不同p效率水稻基因型在分蘖期、孕穗期和成熟期的钙(ca)、镁(mg)营养特性.结果表明，低p胁迫对不同基因型水稻ca、mg吸收的影响因生育期、基因型和部位不同而不同.分蘖期时，低p胁迫使水稻体内ca含量增加，低p敏感基因型水稻地上部mg含量增加，耐低p基因型则mg含量降低.孕穗期时，低p胁迫使不同基因型水稻体内ca、mg含量下降.至成熟期，除99056外，其它基因型籽粒内ca、mg含量均降低；除99012外，其它基因型茎叶中ca、mg含量也降低.各个时期低p胁迫都降低了ca、mg在水稻地上部分的积累量，耐低p基因型只在孕穗期表现出相对的优势.低p胁迫同时降低了成熟期茎叶内ca、mg向籽粒的转移，但99056却例外.低p胁迫下，较之低p敏感基因型，耐低p基因型水稻对ca、mg的吸收和积累并没有表现出明显的优势.图4表7参26
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