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. 2021 Sep 17;100(12):101490. doi: 10.1016/j.psj.2021.101490

Table 5.

Average values of substances reactive to thiobarbituric acid (TBARS), in MDA mg/kg in the breast meat of broiler chickens refrigerated for 24 h, frozen at −20°C for 20 d and 40 d, fed with diets containing different vitamin A supplementation.

Vitamin A (IU/Kg)
Supplementation1 0 6,000 16,000 26,000 36,000 46,000 Average2 SEM P (Anova) P (Test F) P (Regression)
24h T – 21 0.028 0.029 0.023 0.030 0.032 0.030 0.0287 0.01222 0.7579 0.1180 0.6346
T – 42 0.037 0.034 0.028 0.029 0.033 0.040 0.0335 0.01816 0.7850 0.1359
20d T – 21 0.026 0.025 0.040 0.030 0.030 0.053 0.0034 0.22564 0.3425 0.62310 0.1625
T – 42 0.032 0.027 0.059 0.039 0.065 0.060 0.0476 0.03162 0.0795 0.6526
40d T – 21 0.016 0.015 0.014 0.013 0.014 0.015 0.0144 0.00593 0.9188 0.3046 0.2614
T – 42 0.013 0.012 0.020 0.014 0.017 0.018 0.0157 0.00672 0.2614 0.6218

L, linear; Q, Quadratic.

1

T-21 d: birds supplemented with treatments in the period of the 4 to 21 days of age; T-42 d: birds supplemented with treatments in the period of the 4 to 42 days of age.

2

Test F (P ≤ 0.05) for comparing the averages of vitamin A supplementation times.