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OALib Journal期刊
ISSN: 2333-9721
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低磷胁迫对不同油茶无性系幼苗生长及养分利用效率的影响
DOI: 10.3969/j.issn.1000-2006.2014.03.009, PP. 45-49
Keywords: 油茶无性系,低磷胁迫,养分吸收利用效率
Abstract:
选择砂培处理的油茶无性系幼苗为对象,采用裂区设计,以0、0.05、0.5mmol/l3种磷处理水平(p0、p1、p2)模拟低磷胁迫,研究低磷胁迫对5个油茶优良无性系生长及氮、磷、钾吸收利用效率的影响差异。结果表明:不同油茶无性系间耐低磷胁迫差异显著;随低磷胁迫的加剧,各无性系的生物量和氮、磷吸收量减少,而利用率增加。无磷和低磷时湘林67和湘林69两个无性系的生物量和磷吸收量、利用效率均较高,叶片氮磷比(n/p)和叶片δ(n/p)均较低,表明这两个无性系具有较好的体内磷养分循环利用机制,具备良好的耐低磷胁迫能力。
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