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  •  果树的需肥特点_科普知识_管家婆论坛|管家婆图库_管家婆马报-管家婆资料大全
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    果树的需肥特点

    2017-05-05

      1.幼年果树的需肥特点:①对氮、磷、钾肥料都需要,尤其对氮、磷肥需求较多,磷对根系生长有积极促进作用。②全年以施3-4次肥料为宜。
      2.成年结果期果树的需肥特点:①需要养分的数量大,种类多。每年采收果实、修剪树枝,带走了大量的养分,平衡供肥是保持树体营养的关键。②随着树龄的增长,不仅对大量元素需求比例有变化,而且对中微量元素的需求更迫切,改土培肥尤为关键。③全年对氮、钾需求数量多于磷,各生育阶段对氮、磷、钾的需求数量和比例不同。萌芽、开花、新枝生长需要较多的氮素。幼果期到膨果期需要充足的氮、磷、钾,尤其是氮和钾。果实采收后至落叶,是树体积累营养时期,积累营养的多少对来年萌芽开花影响较大。④有明显的需肥高峰期。5-7月份是生长旺盛期,枝叶生长、花芽分化、开花结果、根系生长需消耗大量的营养物质。

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