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Odour Emissions Following Application of Hog Slurry to Grassland

机译：猪浆在草地上的应用后，气味排放

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Nuisance odours emanating from livestock operations are a major concern to the non-farming public. Several field experiments were conducted to evaluate the effect of management strategies and meteorological conditions on odour emissions from hog slurry applied to grass, Management strategies included slurry application rate, soil water status, slurry dilution with water and rainfall simulation shortly after field application. It was found that doubling (120,000 L ha~(-1)) the application rate had noimpact on odour emissions. Tripling (180,000 L ha~(-1)) the application rate, however, increased emissions, relative to a conventional (60,000 L ha~(-1)) application rate. Applying slurry to soil that received rainfall prior to application increased emissions in one of the experiments, compared to soil that did not receive water. On average, diluting slurry with water decreased emissions by only 11%. Meanwhile, rainfall immediately after application increased odour emissions by 17%. Odour fluxes increased with higher windspeed, net radiation and evapotranspiration. Ocfo(/r emissions can therefore, be reduced by following proper application rates, but most importantly, by applying slurry during calm, cool days. However, such stable weather conditions may increase odour persistence due to lack of vertical mixing, reduced transfer rates and slow drying of the slurry.
机译：从畜牧业发出滋扰气味是一个主要关注的非农公开。一些田间试验，以评估的管理策略和从猪浆异味排放气象条件适用于草的影响，管理战略，包括浆料的应用率，土壤水分状况，浆用水稀释和模拟降雨后不久领域的应用。据发现，加倍（120,000 L HA〜（-1））的施用率noimpact对气味的排放。三倍（180,000 L HA〜（-1））的施用率，然而，增加的排放，相对于传统的（60000 L HA〜（-1））的施用率。应用浆土应用在实验中的一个排放量有所增加，相比于未接受水土收到降雨之前。平均来说，用水稀释淤浆通过只有11％降低的排放。同时，降雨后立即申请了17％上升异味排放。气味通量较高的风速，净辐射和蒸散增加。因此，通过下面的适当的施用率可以减小Ocfo（/ R的排放量，但最重要的是，通过平静期间施加浆料，冷却天。然而，这样的稳定​​的天气条件下可能会增加气味持久性，由于缺乏垂直混合的，降低的传输速率和浆料的干燥慢。

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