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. 2020 Aug 5;99(11):5681–5696. doi: 10.1016/j.psj.2020.07.010

Table 9.

Effect of corn drying temperature (T), particle size (P), and enzyme supplementation on gastrointestinal organ development of Cobb 500 male broilers at 42 D raised in floor pens (Experiment 1).

Drying T (°C) Particle size1 Enzyme2 (g ton-1) Relative length
 Relative weight
Intestine Ceca Gizzard Proventriculus Liver
----(cm/kg)---- --------(%)--------
35 59.89 5.87 1.03 0.26 2.38
120 60.35 5.80 1.01 0.26 2.31
SEM 0.42 0.07 0.01 0.04 0.03
Coarse 60.13 5.89 1.08 0.25 2.40
Fine 60.11 5.78 0.97 0.27 2.29
SEM 0.42 0.07 0.01 0.004 0.03
0 59.11b 5.84 1.03 0.26 2.35
133 59.93a,b 5.84 1.02 0.26 2.35
266 61.32a 5.83 1.02 0.26 2.34
SEM 0.51 0.08 0.01 0.01 0.03
35 Coarse 60.20 5.99 1.08 0.25 2.43
Fine 59.59 5.75 0.99 0.27 2.33
120 Coarse 60.07 5.80 1.08 0.26 2.37
Fine 60.63 5.80 0.95 0.27 2.26
SEM 0.59 0.09 0.01 0.01 0.04
35 0 59.52 5.97 1.07a 0.26 2.38
133 59.28 5.74 1.03a,b 0.26 2.34
266 60.88 5.91 1.01b 0.27 2.41
120 0 58.70 5.70 1.00b 0.26 2.32
133 60.59 5.95 1.00b 0.26 2.36
266 61.77 5.75 1.03a,b 0.26 2.26
SEM 0.72 0.12 0.02 0.01 0.05
Coarse 0 59.63 6.16a 1.11a 0.26 2.37
133 59.37 5.85a,b,c 1.05b 0.25 2.41
266 61.40 5.67c,d 1.07a,b 0.26 2.42
Fine 0 58.59 5.51d 0.95c 0.27 2.34
133 60.49 5.83b,c 0.98c 0.27 2.29
266 61.24 5.99a,b 0.97c 0.27 2.25
SEM 0.72 0.12 0.02 0.01 0.05
Source of variation ------------P-values------------
Drying T (°C) 0.439 0.455 0.145 0.807 0.137
Particle Size 0.966 0.217 <0.001 0.011 0.018
Enzyme 0.010 0.995 0.704 0.842 0.956
T (°C) × Particle size 0.326 0.219 0.131 0.479 0.972
T (°C) × Enzyme 0.293 0.098 0.023 0.936 0.277
Particle size × Enzyme 0.319 <0.001 0.070 0.419 0.409
T (°C) × P Size × Enzyme 0.979 0.287 0.611 0.769 0.335

Means in a column not sharing a common superscript lowercase letter are significantly different (P < 0.05) by Student t or Tukey's test.

Values are means ± SEM of 8 pens per treatment combination with 20 male broiler chickens per pen.

1

Particle size: coarse corn (800–900 μm), and fine corn (400–500 μm).

2

Ronozyme HiStarch CT to supply 80 (133 g ton-1) and 160 (266 g ton-1) kilo-Novo alpha amylase units (KNU).