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鸭梨幼龄和成树叶片中营养元素周年变化规律研究

标题: 鸭梨幼龄和成树叶片中营养元素周年变化规律研究
作者: 卢伟红,张玉星
出版时间: 2013-01-01
机构: 河北农业大学
关键词: 鸭梨,叶片,营养元素,周年变化
英文关键词: Yali pear,leaves,nutritive element,annual change
刊名: 北方园艺
英文刊名: Northern Horticulture
ISSN: 1001-0009
卷号: 014
页码: 40-43
分类号: S661.2
摘要: 以4a生、10a生鸭梨树为试材,测定比较了鸭梨幼龄树和成龄树叶片10种营养元素含量的变化,以揭示幼龄树与成龄树营养需求和分配的差异.结果表明:幼龄和成龄鸭梨树10种营养元素周年动态变化规律基本一致,N、P、K、Cu元素展叶时含量最高,以后随叶龄增加而逐渐降低,Zn、B元素含量先降低,以后逐渐增加,到6月中旬以后维持一定含量,Mn、Fe、Mg、Ca元素含量则随叶龄增加而逐渐增高,落叶时含量达到最高,其中Ca元素含量增加较迅速.成龄鸭梨树叶片中K、Mg元素含量高于幼龄树,P、Ca、Fe、Cu、Zn、B元素含量低于幼龄树,在6月份之前成龄树叶片中N、Mn元素含量高于幼龄树,之后幼龄树叶片高于成龄树.
英文摘要: Taking 4-year-old and 10-year-old pear as materials,the contents of mineral elements in the young and mature leaves of Yali pears in different growth periods were measured,to reveal the nutritional requirement and the difference distribution of the young and mature Yali pears ’ trees.The results showed that the annual changes of 10kinds of nutritive element showed the same pattern in both mature and young trees.The contents of N,P,K and Cu were peaked in the leaf flushing period,and then would reduce gradua...