]*>","")" /> Effect of Topping,chem-Control and Phosphorus Fertilization on the Yield Components,Forming and Shedding of Buds and Bolls of Long Fiber Cotton
Xinjiang Agricultural Sciences

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Effect of Topping,chem-Control and Phosphorus Fertilization on the Yield Components,Forming and Shedding of Buds and Bolls of Long Fiber Cotton

LIANG Zhi;ZHOU Bao;ZHONG Xin-cai;YANG Tao   

  • Received:2007-02-25 Revised:2007-02-25 Online:2007-02-25 Published:2007-02-25

打顶、化控与磷肥耦合对长绒棉产量结构、蕾铃形成及脱落的影响

梁智;周勃;钟新才;杨涛   

  1. 新疆农科院土肥所,乌鲁木齐,830091





摘要： 采用田间小区试验,首次系统地研究了打顶、化控、磷肥耦合对长绒棉产量构成、蕾铃形成及脱落的影响.结果表明,打顶、化控和磷肥对棉花产量表现出负耦合效应.打顶、化控和磷肥单独使用对长绒棉有增产作用,而它们配合使用表现出减产作用.低磷不化控情况下,打顶可使棉花蕾铃脱落率显著降低,从而使单株有效结铃数增加.低磷不打顶情况下,化控同样能降低长绒棉的蕾铃脱落率,但化控也降低了现蕾数,从而使其单株结铃数没有显著增加.在不打顶不化控情况下,增施磷肥可显著提高长绒棉的现蕾数,使单株结铃数提高.在化控或高磷情况下打顶都会使长绒棉的现蕾数明显下降,导致单株有效结铃数降低.