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. 2022 Apr 11;100(5):skac116. doi: 10.1093/jas/skac116

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© The Author(s) 2022. 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 1. — Changes in the ADG from days 31 to 38 with supplementation of xylanase using a broken-line analysis. The break point was 440 XU per d of xylanase supplementation when ADG from days 31 to 38 was 0.73 kg/d. The equation for ADG from days 31 to 38 was Y = 0.73 − 0.00036x zl; if xylanase supplementation is ≥break point, then z = 0; if xylanase supplementation is <break point, then zl = break point − xylanase supplementation. Values for xylanase activity were based on the analyzed values. P-value for the plateau was <0.0001, for the slope was 0.043, and for the breaking point was 0.012. The break point was converted from 440 XU per d to 736 XU per kg feed by dividing with the overall average feed intake (0.598 kg/d).