Aims

Plantain has been shown to possess biological nitrification inhibiting (BNI) activity, which can reduce nitrous oxide (N₂O) emissions from ruminant urine patches. However, the effectiveness of plantain in mitigating these emissions remains unclear.

Methods

In this study, the ¹⁵N flux method was employed to investigate the relationship between different plantain proportions in pasture sward and gaseous nitrogen (N) ((N₂O and dinitrogen (N₂)) loss following dairy cow urine deposition (660 kg N ha^-1) on the Allophanic and Gley soils.

Results

The findings indicate that the presence of plantain reduced cumulative N₂O emissions after urine deposition, but there was no direct correlation between the nominal sowing rate and its mitigation effectiveness. However, in the Allophanic soil, there was a reduction in cumulative N₂O emissions with an increase in the proportion of plantain in the dry matter. Plantain presence increased total N₂ emissions in both soil types, possibly due to its BNI function, which would retain mineral N in the soil for an extended period, providing substrate for complete denitrification. The total N₂ emissions from the Allophanic soil with plantain presence were higher compared to those from the Gley soil.

Conclusion

This study revealed the role of soil type in the effect of plantain on N₂O and N₂ emissions from urine patches. The increase of proportion of plantain in the pasture dry matter in the Allophanic soil decreased cumulative N₂O emissions, while no effect of plantain proportion was observed in the Gley soil.

中文翻译：

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牧场中车前草（Plantago lanceolata L.）对富氮尿液斑块气态氮排放的影响

 目标

车前草已被证明具有生物硝化抑制 (BNI) 活性，可以减少反刍动物尿斑中一氧化二氮 (N ₂ O) 的排放。然而，车前草在减少这些排放方面的有效性仍不清楚。

 方法

本研究采用 ¹⁵ 氮通量方法研究了草场中不同车前草比例与气态氮（N）（（N ₂ O）和二氮（N< b2> )) 奶牛尿液沉积（660 kg N ha ^-1 ）在 Allophanic 和 Gley 土壤上造成的损失。

 结果

研究结果表明，车前草的存在减少了尿液沉积后累积的 N ₂ O 排放，但名义播种量与其缓解效果之间没有直接相关性。然而，在水铝土中，随着干物质中车前草比例的增加，累积 N ₂ O 排放量减少。车前草的存在增加了两种土壤类型中的总氮 ₂ 排放量，这可能是由于其BNI功能，它可以将矿物氮长时间保留在土壤中，为完全反硝化提供基质。与 Gley 土壤相比，有车前草存在的水铝土土壤的总氮 ₂ 排放量更高。

 结论

这项研究揭示了土壤类型在车前草对尿液斑块中 N ₂ O 和 N ₂ 排放的影响中的作用。水土中牧草干物质中车前草比例的增加减少了累计N ₂ O排放量，而在格莱土中没有观察到车前草比例的影响。