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In fattening pig husbandry new feeding concepts offer great potential to reduce nitrogen inputs in the environment. Fattening pigs differ individual in their nutritional needs and feed intake capacity. Classification into performance groups enables to feed the animals efficiently and to avoid luxury consumption. In the study the impact on ammonia emissions under a new feeding concept based on performance groups and crude fibre supplemented diets was investigated. For the study 610 pigs were classified into four performance groups based on body weight and the ratio of backfat and back muscle thickness determined by ultrasound examinations. Using sorting gates and four different feeding areas, each group was fed with a specific diet differing in crude fibre content. Ammonia emissions were measured continuously in the experimental and a control barn. In the experimental barn ammonia emissions were reduced by 40% compared to the control barn. During 50-110 kg mean ammonia emissions were 7.68 g d -1 animal-1 and 12.67 g d-1 animal-1 (experimental and control group). Also for the individual fattening period sections (pre-fattening, mid-fattening, finishing) ammonia emissions were significant lower in the experimental barn. The largest difference of 44% was observed during the finishing period. Resource efficient feeding is desirable from an environmental and economic aspect. Furthermore, animal welfare can be improved by crude fibre supplementation. Especially in view of climate change, livestock husbandry has to be adapted to new requirements. The study shows that the tested feeding concept enables the connection of environmental protection, animal welfare and economic efficiency.

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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: 4th international Symposium on Gas Emissions and Dust from Livestock (EMILI) 4 - Mitigation Strategies

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Publication type: Presentation
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Language 1: en
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Rights: Canadian Society for Bioengineering
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