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<p>Currently, 70% of fertilizers used are nitrogen-based due to the high demand for this nutrient by crops such as corn. However, nitrogen (N) fertilizers are subject to losses in the soil, mainly through ammonia volatilization, thus reducing nitrogen use efficiency (NUE). The use of N sources and rates, such as calcium ammonium nitrate (CAN), that provide an adequate nutritional balance and increased yield is essential. Thus, we aimed to evaluate the impact of N rates supplied with urea and CAN on the yield components, nutritional status, and yield of corn grains over three crop seasons in a soil with low organic matter content, under no-tillage conditions in subtropical conditions. The treatments, distributed in a 2 × 4 factorial and arranged in a randomized completed block design with four replications, consisted of four N rates (0, 80, 160 and 240&#xa0;kg N ha<sup>− 1</sup>) and two N sources (CAN and urea). We evaluated plant height (PH), first ear insertion height (FEIH), ear length (EL) and diameter (ED), number ears/plant (NEP), rows/ear (NRE), and number of grains/rows (NGR), thousand grain weight (TGW), estimated yield grain, and extraction and export of N, P, K, Ca and Mg. Superiority of the variables PH, EL, NRE, NGR, and TGW was observed with the use of CAN. The estimated yield was 9.6% higher with the use of CAN during the three crop seasons. The extraction and export of macronutrients, increased as N rates increased, and the export of N, P, and Ca was lower with the use of urea.</p>

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Calcium Ammonium Nitrate Increases Corn Yield, Nutrient Extraction and Exportation in a Low Organic Matter Soil

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Ezequiel Helbig Pasa,
  • Hector Tavares Ferreira,
  • Henrique Lemos Quadros,
  • Júlia Peralta Ferreira,
  • Cristiano Weinert,
  • Mateus da Silveira Pasa,
  • Tiago Pedó,
  • Rogério Oliveira de Sousa,
  • Filipe Selau Carlos

摘要

Currently, 70% of fertilizers used are nitrogen-based due to the high demand for this nutrient by crops such as corn. However, nitrogen (N) fertilizers are subject to losses in the soil, mainly through ammonia volatilization, thus reducing nitrogen use efficiency (NUE). The use of N sources and rates, such as calcium ammonium nitrate (CAN), that provide an adequate nutritional balance and increased yield is essential. Thus, we aimed to evaluate the impact of N rates supplied with urea and CAN on the yield components, nutritional status, and yield of corn grains over three crop seasons in a soil with low organic matter content, under no-tillage conditions in subtropical conditions. The treatments, distributed in a 2 × 4 factorial and arranged in a randomized completed block design with four replications, consisted of four N rates (0, 80, 160 and 240 kg N ha− 1) and two N sources (CAN and urea). We evaluated plant height (PH), first ear insertion height (FEIH), ear length (EL) and diameter (ED), number ears/plant (NEP), rows/ear (NRE), and number of grains/rows (NGR), thousand grain weight (TGW), estimated yield grain, and extraction and export of N, P, K, Ca and Mg. Superiority of the variables PH, EL, NRE, NGR, and TGW was observed with the use of CAN. The estimated yield was 9.6% higher with the use of CAN during the three crop seasons. The extraction and export of macronutrients, increased as N rates increased, and the export of N, P, and Ca was lower with the use of urea.