The effect of feed composition and feeding strategies on excretion rates in German pig production

作者：Daemmgen Ulrich; Brade Wilfried; Schulz Joachim; Klausing Heinrich Kleine; Hutchings Nicholas J; Haenel Hans Dieter; Roesemann Claus

来源：Landbauforschung Volkenrode, 2011, 61(4): 327-341.

• pigs
• feed
• phase feeding
• production cycles
• excretion
• methane
• volatile solids
• nitrogen
• TAN

In order to improve the methods and update the data for the German agricultural emission inventory, a survey was made among pig nutrition experts to obtain representative diet compositions and feeding strategies. The analysis shows that the introduction of phase feeding results in reduced excretion rates of volatile solids. Contrary to expectations, the direct effect on all other excretion rates is comparatively small. However, phase feeding with its typical all-in-all-out management results in extended production cycles as fattening of new animal groups commences after cleansing and disinfection, and these do not commence before the last animal left the respective compartment. This leads to a reduction of emissions per place. The effect of diets adjusted to crude protein demands is obvious. Improvement of standard diet is a clear option to reduce emissions.
As the emissions of methane from manure management, as well as those of all nitrogen species, are directly related to the respective amounts excreted, the calculations using detailed information on feed composition will result in reduced emission rates from pig production.

• 出版日期2011-12