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大蒜春节后怎样施肥
更新时间: 2020-11-02 00:00:00  

大蒜属耐肥作物,在施足底肥的基础上,春季仍需进行追肥。高产田追肥总量控制在纯氮25斤,钾10斤。施肥要掌握好营养旺盛生长期(4月上中旬)为氮肥最大效率期,蒜头膨大期(谷雨~立夏)为钾肥最大效率期,并在叶片形成期所需营养以氮为主,缺氮越早减产幅度越大。大蒜属喜硫作物。大蒜素主要为双硫基化合物。大蒜体内蛋白质大多含硫,硫对提高大蒜品质有重要作用。同时研究表明只有当肥料N/S接近最佳值时,植株吸收的氮硫才能得到最有效的利用。考虑由于目前土壤酸化问题较为突出,建议在追施碱性水溶钾肥(如超威钾,含钾、含硫量高,吸收利用率高,中和改良酸化土壤)。

关键词: 大蒜 春节 怎样 施肥

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