The fate of nitrogen of ammonium phosphate fertilizers: A blind spot

IF 2.3 4区 农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Agricultural & Environmental Letters Pub Date : 2023-10-09 DOI:10.1002/ael2.20116
Andrew J. Margenot, Jeonggu Lee
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Abstract

Ammonium phosphate fertilizers are a common phosphorus (P) source for crops, namely monoammonium phosphate, diammonium phosphate, and ammonium polyphosphate. Despite containing appreciable nitrogen (N), ammonium phosphate fertilizers are generally considered P fertilizers. However, the approximately 8.5 million Mg N co-applied with P annually as ammonium phosphate fertilizers represents 8% of global N fertilizer input flux to agroecosystems. Despite this, a systematic review of the literature revealed only one direct assessment of N losses from ammonium phosphate fertilizers. An additional five studies reported NO3-N leaching and N2O-N emissions from soils fertilized with ammonium phosphates, but inadvertently as observations from failed or control treatments that are confounded (e.g., not accounting for non-fertilizer contributions to N losses). The magnitude and fate of N co-applied with P in ammonium phosphate fertilizers is a blind spot in agroecosystem N budgets and environmental footprints that necessitates quantification.

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磷酸铵肥料中氮的命运:一个盲点
磷酸铵肥料是作物常见的磷源,即磷酸一铵、磷酸二铵和聚磷酸铵。尽管含有可观的氮(N),磷酸铵肥料通常被认为是磷肥。然而,每年约850万Mg N与P作为磷酸铵肥料共同施用,占全球农业生态系统氮肥投入通量的8%。尽管如此,对文献的系统回顾显示,只有一项对磷酸铵肥料氮损失的直接评估。另有五项研究报告了施用磷酸铵的土壤中NO3-N的浸出和N2O-N的排放,但无意中是由于失败或对照处理的观察结果令人困惑(例如,没有考虑非肥料对氮损失的贡献)。磷酸铵肥料中氮与磷共同施用的数量和命运是农业生态系统氮预算和环境足迹的盲点,需要量化。
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来源期刊
CiteScore
3.70
自引率
3.80%
发文量
28
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