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<p>Plantain (<i>Plantago lanceolata</i>) has shown the potential to reduce nitrous oxide (N<sub>2</sub>O) emissions from urine patches. However, inconsistent results have been reported in previous studies. In this context, the sward age might be a factor regulating plantain effectiveness in mitigating N<sub>2</sub>O emissions. Thus, this study aimed to assess the effect of sward age on N<sub>2</sub>O emissions from urine patches under different sward composition ratios of ryegrass/white clover (RG/WC) and plantain (PL). We also examined the potential impact on N<sub>2</sub>O emissions of transitioning a RG/WC based pasture to PL swards. Two field experiments were undertaken to: (i) compare N<sub>2</sub>O emission from urine applied to 2-year (Old plantain) and 3-month (New plantain) old swards with sowing densities aiming at four proportions of PL mixed with RG/WC (0; 30; 45 and 100% PL) and (ii) assess N<sub>2</sub>O emissions during soil cultivation and sowing following transition from RG/WC to PL swards. New plantain tended to decrease N<sub>2</sub>O emissions from urine patches by ~ 31% relative to RG/WC pastures, but this effect was significant only in the 45% PL. In contrast, there were no significant effects of the Old plantain sward, probably because of increased clover biomass relative to the new sward. In addition, the transition from RG/WC pasture to PL swards increased N<sub>2</sub>O emissions from 0.1 to 1.53&#xa0;kg N ha<sup>−1</sup>. Finally, our results suggest that plantain’s inhibitory effect on N<sub>2</sub>O emissions from cattle urine is more effective in a 3-month-old sward than a 2-year-old sward. However, it was not possible to disentangle effects of&#xa0;sward age and clover share in the sward in this study. Pasture renewal increased N<sub>2</sub>O emissions, and therefore, other approaches to renew swards should be considered to minimize N<sub>2</sub>O emissions.</p>

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Do sward age and pasture renewal affect the potential of plantain (Plantago lanceolata) to reduce N2O emissions from urine patches?

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  • 发表日期：

    2026年1月22日

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  • Priscila L. Simon,
  • Pablo Lacerda Ribeiro,
  • Cecile A. M. de Klein

摘要

Plantain (Plantago lanceolata) has shown the potential to reduce nitrous oxide (N2O) emissions from urine patches. However, inconsistent results have been reported in previous studies. In this context, the sward age might be a factor regulating plantain effectiveness in mitigating N2O emissions. Thus, this study aimed to assess the effect of sward age on N2O emissions from urine patches under different sward composition ratios of ryegrass/white clover (RG/WC) and plantain (PL). We also examined the potential impact on N2O emissions of transitioning a RG/WC based pasture to PL swards. Two field experiments were undertaken to: (i) compare N2O emission from urine applied to 2-year (Old plantain) and 3-month (New plantain) old swards with sowing densities aiming at four proportions of PL mixed with RG/WC (0; 30; 45 and 100% PL) and (ii) assess N2O emissions during soil cultivation and sowing following transition from RG/WC to PL swards. New plantain tended to decrease N2O emissions from urine patches by ~ 31% relative to RG/WC pastures, but this effect was significant only in the 45% PL. In contrast, there were no significant effects of the Old plantain sward, probably because of increased clover biomass relative to the new sward. In addition, the transition from RG/WC pasture to PL swards increased N2O emissions from 0.1 to 1.53 kg N ha−1. Finally, our results suggest that plantain’s inhibitory effect on N2O emissions from cattle urine is more effective in a 3-month-old sward than a 2-year-old sward. However, it was not possible to disentangle effects of sward age and clover share in the sward in this study. Pasture renewal increased N2O emissions, and therefore, other approaches to renew swards should be considered to minimize N2O emissions.