休眠期甜樱桃幼树体内氮素的运转Nitrogen transportation of young sweet cherry tree in dormant period
李学强;李秀珍;吕德国;张国海;
摘要(Abstract)：
以盆栽2a生甜樱桃庄园为试材,运用同位素示踪法研究了甜樱桃幼树在休眠期植株体内氮素的运转。结果表明,当年秋季吸收的15N积累趋势和总氮积累趋势一致,即根部大于地上部,而且更趋向于在根中积累。2005年12月8日与10月25日相比,芽、1a生木质、多年生木质、砧段木质、大根木质中氮含量减少,而1a生枝皮、多年生枝皮、砧段皮、大根皮、粗根、细根中氮含量增加,此期所有部位的NDFF值均降低。2006年2月12日与2005年12月8日相比除砧段皮氮含量降低外,其他部分的氮含量都有所增加,NDFF值均增加;与2006年2月12日相比,2006年4月21日芽、砧段皮、大根皮、细根的氮含量增加,各部位NDFF值均降低。秋季吸收的氮素可贮藏在根和枝干中,但贮藏在细根和粗根中的量大于枝干中的量。甜樱桃植株在休眠期间也具有吸氮能力,只是在不同的阶段其吸氮能力不同;同时此期氮素发生了再分配,由木质部运往皮部。
关键词(KeyWords)： 甜樱桃;氮;运转;休眠期
基金项目(Foundation): 辽宁省博士起动基金项目(20001044);; 河南省科技攻关项目(0324070091)
作者(Author): 李学强;李秀珍;吕德国;张国海;
Email:
DOI: 10.13925/j.cnki.gsxb.2010.01.015
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