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. 2020 Feb 4;98(2):skaa038. doi: 10.1093/jas/skaa038

Table 3.

Effect of including cotton byproducts in a finishing ration on growth performance and feed efficiency of crossbred steers

Treatment1
Item CON CTN SEM2 P-value
BW,3 kg
 Day 0 312 313 11.8 0.49
 Day 14 349 350 11.5 0.87
 Day 28 382 380 11.9 0.54
 Day 56 446 453 14.4 0.18
 Day 84 496 509 17.4 0.07
 Day 112 542 559 17.6 0.50
 Final4 614 632 11.7 0.09
ADG5, kg
 Days 0 to 14 2.69 2.68 0.203 0.98
 Days 14 to 28 2.36 2.12 0.115 0.14
 Days 28 to 56 2.28 2.61 0.161 0.15
 Days 56 to 84 1.78 2.02 0.132 0.10
 Days 84 to 112 1.63 1.79 0.063 0.04
 Days 112 to final 1.73 1.80 0.060 0.29
 Days 0 to 28 2.53 2.40 0.107 0.43
 Days 28 to final 1.84 2.03 0.085 0.06
 Days 0 to final 1.95 2.09 0.080 0.08
DMI6, kg/d
 Days 0 to 14 7.0 7.1 0.16 0.49
 Days 14 to 28 11.2 10.3 0.36 0.09
 Days 28 to 56 11.3 11.8 0.55 0.41
 Days 56 to 84 12.3 13.3 0.57 0.07
 Days 84 to 112 12.5 13.4 0.45 0.03
 Days 112 to final 13.0 13.9 1.05 0.09
 Days 0 to 28 9.1 8.9 0.18 0.42
 Days 28 to final 12.3 13.2 0.46 0.07
 Days 0 to final 11.7 12.4 0.35 0.04
G:F7
 Days 0 to 14 0.391 0.379 0.0314 0.74
 Days 14 to 28 0.210 0.208 0.0091 0.83
 Days 28 to 56 0.204 0.220 0.0077 0.16
 Days 56 to 84 0.145 0.151 0.0060 0.40
 Days 84 to 112 0.131 0.135 0.0065 0.39
 Days 112 to final 0.134 0.130 0.0032 0.30
 Days 0 to 28 0.279 0.272 0.0121 0.68
 Days 28 to final 0.150 0.153 0.0029 0.32
 Days 0 to final 0.167 0.167 0.0036 0.86

1Treatments included (DM basis): (CON) = 7% hay, 15% Sweet Bran, 67.25% rolled corn, 5% liquid supplement, or (CTN) = 7% cotton gin trash, 15% whole cottonseed, 72.75% rolled corn. Both rations contained 5% dry supplement and 0.75% urea.

2 n = 8 pens per treatment.

3Body weight adjusted by a 4% calculated pencil shrink.

4Cattle were harvested in 2 groups: day 140 (n = 4 pens per treatment) and day 168 (n = 4 pens per treatment).

5Pen average daily gain ADG calculated from individual shrunk BW gain, kg divided by days on feed for each period.

6Pen DMI calculated from total DMI for the pen for each period divided by the total steers and days on feed in each period.

7Gain to feed calculated by dividing the ADG for the pen by the average daily DMI for the pen for each respective period.