Table 2. Effect of calcium-enriched fatty acid along with chronic heat stress on growth performance in broilers1)
Period | CON | 0.52) | 1.0 | 2.0 | 5.0 | SEM | p-value |
BW (g) |
Day 1 | 40.93 | 41.00 | 40.83 | 40.93 | 40.86 | 0.050 | 0.861 |
Day 7 | 163.74 | 164.83 | 167.64 | 169.93 | 160.33 | 1.202 | 0.100 |
Day 14 | 426.24b | 440.89ab | 454.60a | 457.19a | 423.21b | 3.820 | 0.003 |
Day 21 | 822.38 | 838.38 | 852.78 | 866.05 | 814.76 | 6.663 | 0.077 |
Day 28 | 1,408.53ab | 1,436.09ab | 1,486.79a | 1,507.00a | 1,328.00b | 16.668 | 0.001 |
Day 35 | 2,027.87ab | 2,036.72ab | 2,118.18ab | 2,161.22a | 2,000.56b | 18.194 | 0.014 |
ADG (g/d) |
Day 7 | 17.54 | 17.69 | 18.12 | 18.43 | 17.07 | 0.172 | 0.101 |
Day 14 | 37.50 | 39.44 | 40.99 | 41.04 | 37.55 | 0.482 | 0.020 |
Day 21 | 56.59 | 56.78 | 56.88 | 58.41 | 55.94 | 0.845 | 0.932 |
Day 28 | 83.74ab | 85.39ab | 90.57a | 91.56a | 73.32b | 1.842 | 0.005 |
Day 35 | 88.48 | 85.80 | 90.20 | 93.46 | 96.08 | 1.759 | 0.391 |
Day 1–21 | 37.21 | 37.97 | 38.66 | 39.29 | 36.85 | 0.317 | 0.077 |
Day 21–35 | 86.11 | 85.60 | 90.39 | 92.51 | 84.70 | 1.079 | 0.081 |
Day 1–35 | 56.77ab | 57.02ab | 59.35ab | 60.58a | 55.99b | 0.520 | 0.014 |
ADFI (g/d) |
Day 7 | 26.60 | 26.49 | 25.61 | 26.38 | 25.48 | 0.560 | 0.959 |
Day 14 | 59.56 | 61.16 | 58.73 | 55.88 | 58.44 | 0.696 | 0.190 |
Day 21 | 80.03 | 84.54 | 80.88 | 77.61 | 86.29 | 1.072 | 0.059 |
Day 28 | 130.90 | 133.58 | 129.94 | 132.86 | 122.97 | 1.727 | 0.323 |
Day 35 | 156.11 | 148.14 | 140.79 | 146.54 | 149.77 | 1.714 | 0.066 |
Day 1–21 | 60.91 | 63.27 | 61.46 | 58.54 | 62.12 | 0.569 | 0.094 |
Day 21–35 | 145.67 | 140.86 | 135.37 | 139.70 | 136.37 | 1.417 | 0.149 |
Day 1–35 | 93.06 | 93.07 | 89.87 | 89.35 | 89.12 | 1.093 | 0.642 |
FCR (g/g) |
Day 7 | 1.52 | 1.50 | 1.42 | 1.43 | 1.49 | 0.034 | 0.896 |
Day 14 | 1.59 | 1.56 | 1.44 | 1.36 | 1.56 | 0.029 | 0.042 |
Day 21 | 1.42ab | 1.49ab | 1.43ab | 1.33a | 1.55b | 0.025 | 0.048 |
Day 28 | 1.57ab | 1.57ab | 1.44ab | 1.45a | 1.70b | 0.032 | 0.042 |
Day 35 | 1.76 | 1.74 | 1.58 | 1.58 | 1.59 | 0.035 | 0.202 |
Day 1–21 | 1.64b | 1.67b | 1.59ab | 1.49a | 1.69b | 0.018 | 0.001 |
Day 21–35 | 1.69 | 1.66 | 1.50 | 1.51 | 1.61 | 0.025 | 0.034 |
Day 1–35 | 1.64 | 1.64 | 1.52 | 1.47 | 1.59 | 0.023 | 0.072 |
Values are the mean of six replicates per treatment.
The ratio of additive of calcium-enriched fatty acid in diets.
Values in a row with different superscripts differ significantly (p < 0.05).
Con, control diet; SEM, pooled standard error of mean; BW, body weight; ADG, average daily gain; ADFI, average daily feed intake; FCR, feed conversion ratio.