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如东县棉花“2+X”磷肥用量田间肥效研究

缪桂红,刘爱云,张居翠,石佑华,王鹏飞

Shanghai Agricultural Science and Technology（2013）

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Abstract
为探索如东县棉花混测土配方施肥技术,寻求棉花磷肥最佳施用量,以如东县主推棉花品种“盐杂3号”为试材,进行了磷肥不同用量肥效即“2+X”田间肥效试验,结果表明,在中等肥力水平下配施氮肥(N)22kg/667 m2、钾肥(K2O) 15 kg/667 m2,磷肥(P2O2)的优化用量为4.5～6 kg/667 m2,能发挥棉花最高产量水平.
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