Methane (CH4) and nitrous oxide (N2O) daily emission from grazing cattle dung patches

It was evaluated the impact of supplementing grazing steers with corn grain, which may affect the quality of faeces and thus the greenhouse gas emissions from dung pats. Data shows daily fluxes of methane (CH4) and nitrous oxide (N2O) from dung pats of supplementing grazing beef steers with corn grain, as well as the corresponding dung cumulative emissions and emission factors (EF). Also, contain meteorological data of the measured period. Dung was applied (1kg) on the soil surface inside cylindrical PVC collars. The site was located in Tandil (37°19'07"S, 59°04'42"W) Argentina. Gasses from dung (supplemented or not) patches and soil (control, i.e. without dung) were monitored over 125 days using the static chamber technique during 17 sampling occasions (Priano et al., 2014). Each dung treatment had five replicates whereas control chambers were only two. Total cumulative gas emissions were estimated by integrating the linear interpolation of the daily fluxes over the monitoring period (OriginLab 2018 Software). In turn, emission factors (EF) were calculated as described by IPCC (2019).

本研究旨在评估向放牧牛补充玉米谷物对粪便质量的影响，进而可能影响粪便堆产生的温室气体排放。数据展示了每日甲烷（CH4）和氧化亚氮（N2O）的排放通量，这些数据来自补充玉米谷物放牧牛肉牛粪便堆，以及相应的粪便累积排放量和排放因子（EF）。此外，还包括了测量期间的气象数据。粪便以（1kg）的量施加于圆柱形PVC环内的土壤表面。研究地点位于阿根廷的坦迪尔（37°19'07''S，59°04'42''W）。使用静态箱法在17次采样期间对粪便（补充或不补充）和土壤（对照组，即无粪便）的气体进行了125天的监测（Priano等，2014年）。每个粪便处理有五个重复样本，而对照组仅有两个。通过将监测期间的每日通量进行线性插值积分来估算总累积气体排放量（OriginLab 2018软件）。相应地，排放因子（EF）的计算方法如IPCC（2019年）所述。