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. 2025 Mar 30;103:skaf101. doi: 10.1093/jas/skaf101

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© The Author(s) 2025. Published by Oxford University Press on behalf of the American Society of Animal Science.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — Concentration of aerial ammonia in the environmental chamber produced from the manure in pigs fed 0.00% or 1.00% BA supplementation in the 24 h collection period (indicated as 0 to 24 h on the x-axis). The changes in aerial ammonia concentrations, ppm were as follows: (Ammonia, ppm)_{0.00% BA} = 0.225 × hour + 0.076, R² = 0.96 and (Ammonia, ppm)_{1.00% BA} = 0.093 × hour + 0.076, R² = 0.96. P value of the overall model: <0.001, P value of the intercept: 0.399, and P values for the slopes [x_t (0.00% BA) and x_s (1.00% BA)] were <0.001 and <0.001, respectively. P value for the contrast between the slopes of 0.00% and 1.00% BA was <0.001. The experimental unit was a pen and the number of observations was 6 per treatment.