Soil acidification has negative impacts on grass biomass production and the potential of grasslands to mitigate greenhouse gas (GHG) emissions. Through a global review of research on liming of grasslands, the objective of this paper was to assess the impacts of liming on soil pH, grass biomass production and total net GHG exchange (nitrous oxide (N₂O), methane (CH₄) and net carbon dioxide (CO₂)). We collected 57 studies carried out at 88 sites and covering different countries and climatic zones. All of the studies examined showed that liming either reduced or had no effects on the emissions of two potent greenhouse gases (N₂O and CH₄). Though liming of grasslands can increase net CO₂ emissions, the impact on total net GHG emission is minimal due to the higher global warming potential, over a 100-year period, of N₂O and CH₄ compared to that of CO₂. Liming grassland delivers many potential advantages, which justify its wider adoption. It significantly ameliorates soil acidity, increases grass productivity, reduces fertiliser requirement and increases species richness. To realise the maximum benefit of liming grassland, we suggest that acidic soils should be moderately limed within the context of specific climates, soils and management.

土壤酸化对草的生物量生产和草地减少温室气体 (GHG) 排放的潜力有负面影响。通过对草地石灰研究的全球回顾，本文的目的是评估石灰对土壤 pH 值、草生物量产量和总净温室气体交换（一氧化二氮 (N ₂ O)、甲烷 (CH ₄ ) 和净二氧化碳 (CO ₂ ))。我们收集了在 88 个地点进行的 57 项研究，涵盖不同的国家和气候带。所检查的所有研究表明，石灰减少或对两种强效温室气体（N ₂ O 和 CH ₄）的排放没有影响。虽然草地的石灰可以增加净 CO _{2排放，由于与 CO 2}相比，N ₂ O 和 CH ₄的全球变暖潜势在 100 年期间更高，因此对总净温室气体排放的影响最小。黎明草原提供了许多潜在的优势，这证明了它的广泛采用是合理的。它显着改善土壤酸度，提高草产量，减少肥料需求并增加物种丰富度。为了实现石灰草地的最大效益，我们建议酸性土壤应在特定气候、土壤和管理的背景下适度石灰。