| 红富士苹果对初夏土施~(15)N-尿素的吸收、分配和利用特性 |
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| 引用本文： | 张芳芳,韩明玉,张立新,刘长虹,赵彩平.红富士苹果对初夏土施~(15)N-尿素的吸收、分配和利用特性[J].果树学报,2009,26(2). |
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| 作者姓名： | 张芳芳 韩明玉 张立新 刘长虹 赵彩平 |
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| 作者单位： | 张芳芳,韩明玉,刘长虹,赵彩平,ZHANG Fang-fang,HAN Ming-yu,LIU Chang-hong,ZHAO Cai-ping(西北农林科技大学园艺学院);张立新,ZHANG Li-xin(西北农林科技大学生命学院,陕西杨凌,712100)
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| 基金项目： | 农业部引进国际先进农业科学技术计划(948计划)，农业部行业计划，陕西省科技攻关项目 |
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| 摘 要： | 以5a生田间红富士苹果为试材,以初夏土施15N-尿素为手段,研究了当年不同时期主要器官对15N-尿素的吸收、分配和利用特性。结果表明,从幼果期到果实采收期,叶片全氮质量分数最高,新梢、根系和果实依次递减;根系优先吸收15N-尿素,在幼果期15N质量分数达到最高,随物候期推进,吸收的15N-尿素外运用于新生器官(新梢、叶片与果实)的建造。到采收期,新生器官的15N质量分数提高,地上部分的15N吸收量明显高于地下部分,其中新梢、叶片和果实15N分配势(Ndff%)比幼果期分别增加了68.6%、80.6%和57.2%;地上部分15N吸收量达366.693mg,分配率为63.9%,占树体总氮量的0.75%;根系Ndff%比幼果期减少了68.8%,15N吸收量为207.5643mg,分配率为36.1%,占树体总氮量的0.42%。采收期树体的当年氮肥利用率为5.7%。
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| 关 键 词： | 红富士苹果 15N-尿素 分配 吸收 利用 |
Studies on the property of absorption and partition of ~(15)N in Fuji apple trees using ~(15)N-labelled urea in early summer |
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| ZHANG Fang-fang,HAN Ming-yu,ZHANG Li-xin,LIU Chang-hong,ZHAO Cai-ping.Studies on the property of absorption and partition of ~(15)N in Fuji apple trees using ~(15)N-labelled urea in early summer[J].Journal of Fruit Science,2009,26(2). |
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| Authors: | ZHANG Fang-fang HAN Ming-yu ZHANG Li-xin LIU Chang-hong ZHAO Cai-ping |
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| Institution: | 1College of Horticulture;2College of Life Science;Northwest A & F University;Yangling;Shaanxi 712100 China |
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| Abstract: | Five-year-old trees of Fuji apple cultivar were used as material for studying the specific property of absorption,partition and utilization of 15N-labelled urea in the different part of the tree at different phenophase using 15N-labelled urea applied in early summer.The results showed that the total N content in leaf was the highest and then decreased in order of shoot,root and fruit during the whole period of fruit development.Moreover,15N-urea fertilizer was absorbed and transported by root firstly.The hi... |
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| Keywords: | Fuji apple 15N-urea Absorption Distribution Utilization |
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