陇东烤烟“3414”施肥效果及推荐施肥量研究

来源 :干旱地区农业研究 | 被引量 : 0次 | 上传用户:lives63712094
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为了探讨“3414”方案在烤烟施肥中的应用和正宁县烤烟的合理施肥量,通过田间试验研究了正宁县烤烟“3414”方案的施肥效果和推荐用量。结果表明,当三元二次肥效模型不能对“3414”试验结果进行拟合时,采用一元二次肥效模型拟合,可以较好地反映产量与施肥量之间的关系;氮、磷肥效应函数属典型模型,钾肥效应函数属非典型模型;结合经济效益分析,可以看出本试验条件下当地烤烟种植的经济最佳氮、磷和钾施用量分别为56 kg·hm-2、78 kg·hm-2和270 kg·hm-2
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