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Quantitative assessment of enteric methane emission and nitrogen excretion by equines

机译：大等石的肠道甲烷排放和氮排泄的定量评估

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In France enteric methane emission (CH4) in horses have been assessed using the net energy requirements of equines expressed in feed units (UFC) and converted to Digestible Energy (DE) intake using prediction equations from the UFC system. Methane emissions were then calculated from DE intake using a prediction equation of methane expressed in percent of DE intake (ECH4 % DE). Emissions of methane have been assessed for the different categories of equines in respect of their physiological status andthe main types of diets at through or grazing using UFC recommended allowances form INRA, 1990 and average composition of diets used in France. Methane emissions averaged 20.7 kg/animal/year whatever the type of equines but the highest value was 29.4 kgfor heavy mare reaching 34% of the emission estimated of a beef cow. Models of prediction of N excretion in faeces and urine of equines have been established from experimental data obtained when measuring digestibility by total collection of faeces and urine and nitrogen balance experiments carried out at INRA. Models for prediction of N faecal or urinary excretion used both N intake as a predictor: R2=0.866 and 0.716 respectively. But reliability and accuracy of N Urinary excretion were improved when using DM intake and N content of diets as predictors (R2=0.824). Annual total N excretion in faeces and urine for a 500 kg BW adult horse at maintenance would amount to 238 kg CP/animal that is to say 38 N units of which about 50% would be supplied by faeces and 50% by urine Assessment of total N excretion of the different categories of equines is in progress. Horse and ponies will be evaluated in respect of physiological status and diets for the French population as for methane emission.
机译：在法国肠道甲烷排放（CH4）中，使用饲料单元（UFC）中表达的等式的净能量要求进行评估，并使用UFC系统的预测方程转换为可消化的能量（DE）摄入量。然后使用以De Intake（ECH4％DE）的百分比表达的甲烷的预测方程从DE Intrake计算甲烷排放。通过使用UFC推荐津贴在INRA，1990年和法国使用的饮食平均饮食组成，已评估甲烷的不同类别等同于其生理状态和通过或放牧的主要类型的饮食。甲烷排放平均为20.7公斤/年/年，无论等分精英的类型，但最高值为29.4公斤，重型母马达到34％的排放估计牛肉牛。从在测量在InRA的总收集和尿液和氮平衡实验的测量时获得的实验数据，确定了粪便中N排泄的预测模型和等式的尿液。用于预测N粪便或尿排泄的模型，使用N个摄入量作为预测值：R2 = 0.866和0.716。但是，当使用DM摄入量和饮食的N含量作为预测因子时，改善了N尿排泄的可靠性和准确性（R2 = 0.824）。维护500公斤BW成人马的粪便和尿液中的每年总计排泄将达到238公斤的CP /动物，即38个单位，其中约50％的单位将由粪便和50％的尿液评估提供总数N个不同类别的商品排泄正在进行中。将在法国人口为甲烷排放的法国人口的生理状态和饮食方面评估马和小马。

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