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中文摘要：
不同铵硝比的氮素营养对菠菜氮磷钾养分吸收影响显著。（1）铵硝比对于菠菜各部位含氮量的影响不大,随着铵硝比的下降,菠菜植株累积的氮素显著增加。（2）适当增铵有利于磷、钾的吸收和累积;铵硝比为25：75的处理,菠菜植株中磷、钾含量和累积量均最高。
英文摘要：
Effects of different NH4＋-N/ NO3--N ratio on nitrogen metabolism,phosphorus,and potassium uptake of spinach were remarkable.Effects of NH4＋-N/ NO3--N ratio on nitrogen contents of spinach organs were slight.Nitrogen accumulation in spinach plant increased with the decrease of NH4＋-N/ N03--N ratio.Proper partial replacement of NO3--N by NH4＋-N was beneficial to both of phosphorus and potassium uptake and accumulation, which were the highest in treatment 25：75 in NH4＋-N/ NO3--N ratio.
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