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首页> 外文期刊>Plant and Soil >Estimating the impact of changing fertilizer application rate, land use, and climate on nitrous oxide emissions in Irish grasslands.
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Estimating the impact of changing fertilizer application rate, land use, and climate on nitrous oxide emissions in Irish grasslands.

机译：估算不断变化的肥料施用量，土地使用和气候对爱尔兰草原中一氧化二氮排放的影响。

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摘要

Aim: This study examines the impact of changing nitrogen (N) fertilizer application rates, land use and climate on N fertilizer-derived direct nitrous oxide (N2O) emissions in Irish grasslands. Methods: A set of N fertilizer application rates, land use and climate change scenarios were developed for the baseline year 2000 and then for the years 2020 and 2050. Direct N2O emissions under the different scenarios were estimated using three different types of emission factors and a newly developed Irish grassland N2O emissions empirical model. Results: There were large differences in the predicted N2O emissions between the methodologies, however, all methods predicted that the overall N2O emissions from Irish grasslands would decrease by 2050 (by 40-60%) relative to the year 2000. Reduced N fertilizer application rate and land-use changes resulted in decreases of 19-34% and 11-60% in N2O emission respectively, while climate change led to an increase of 5-80% in N2O emission by 2050. Conclusions: It was observed in the study that a reduction in N fertilizer and a reduction in the land used for agriculture could mitigate emissions of N2O, however, future changes in climate may be responsible for increases in emissions causing the positive feedback of climate on emissions of N2O.
机译：目的：本研究探讨了氮肥施用量，土地使用和气候变化对爱尔兰草原氮肥衍生的直接一氧化二氮（N 2 O）排放的影响。方法：在基准年2000年以及2020年和2050年制定了一套氮肥施用量，土地利用和气候变化情景。估算了不同情景下的直接N 2 O排放量使用三种不同类型的排放因子和新开发的爱尔兰草原N 2 O排放经验模型。结果：两种方法的预测N 2 O排放量之间存在较大差异，但是所有方法均预测，到2050年，爱尔兰草原的N 2 O排放总量将减少与2000年相比减少了40-60％。氮肥施用量的减少和土地利用变化导致N 2 O排放分别减少了19-34％和11-60％，而到2050年，气候变化导致N 2 O排放增加了5-80％。结论：研究中观察到氮肥减少和农业用地减少可以减轻N 2 O的排放，但是，未来气候变化可能是造成排放增加的原因，导致气候对N 2 O的排放产生正反馈。

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