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首页> 外文期刊>Landbauforschung >Anticipated changes in the emissions of greenhouse gases and ammonia from pork production due to shifts from fattening of barrows towards fattening of boars
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Anticipated changes in the emissions of greenhouse gases and ammonia from pork production due to shifts from fattening of barrows towards fattening of boars

机译：猪肉生产中温室气体和氨气排放的预期变化是由于从公猪育肥向公猪育肥的转变

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Greenhouse gases and of ammonia emissions from pork production will change when fattening of barrows switches towards to fattening of (intact) boars. The results of an accurate feeding experiment allow for the differentiation of the effects on emissions of gender (differentiating in boars, barrows and gilts) and of diet composition. The modified fattening pig module of the agricultural emission model GAS-EM was used to estimate emissions in 2020 when the fattening of barrows will no longer be commonpractice. The scenarios also reflect the effect of the expected increased weight gains and the related effect ofincreased numbers of animals produced. The fattening of intact boars as compared to barrows is associated with a reduction of emissions of greenhouse gases and of ammonia per animal. For ammonia, all scenarios result in reduced emissions, most markedly when this shift is combined with increased weight gains. To a lesser extent, this also applies to nitric and nitrous oxide emissions. Methane emissions are less affected; increased weight gains result in increased emissions. As the greenhouse gas balance is dominated by methane emissions, the overall emission of greenhouse gases (expressed as C0_2 equivalents) is likely to increase slightly in2020 despite the reductions in nitrous oxide emissions.
机译：当公猪的增肥转向公猪的增肥时，温室气体和猪肉生产中的氨气排放量将发生变化。精确喂养实验的结果可以区分对性别排放（公猪，公猪和后备母猪的分化）和日粮组成的影响。农业排放模型GAS-EM的改进的育肥猪模块用于估算2020年的排放量，那时手推车的育肥将不再常见。这些情景还反映了预期增加的体重增加的影响以及生产的动物数量增加的相关影响。与公猪相比，公猪的肥育与减少温室气体和每只动物的氨气排放有关。对于氨来说，所有情况都可以减少排放，最明显的是这种转变与增加的体重增加相结合。在较小程度上，这也适用于一氧化氮和一氧化二氮的排放。甲烷排放受到的影响较小;体重增加增加导致排放增加。由于温室气体平衡主要由甲烷排放量决定，尽管一氧化二氮排放量有所减少，但温室气体的总体排放量（以CO 2当量表示）在2020年可能会略有增加。

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