. 2020 Oct 1;99(12):6745–6752. doi: 10.1016/j.psj.2020.09.050

Table 2.

Effects of chitosan oligosaccharides on the relative weight and length of small intestine in yellow-feather heat-stressed broilers.

Item¹	CON	HS	HSC	SEM	P value
Relative weight (g/kg)
Duodenum	6.03^a	4.28^b	5.18^ab	0.47	0.2645
Jejunum	8.62^a	5.69^b	6.16^b	0.58	0.0884
Ileum	5.49	3.86	4.26	0.59	0.5713
Relative length (cm/kg)
Duodenum	21.95^a	15.39^b	19.95^a	1.16	0.0823
Jejunum	41.72^a	31.94^b	40.29^a	1.99	0.0607
Ileum	44.01^a	27.61^b	34.79^c	2.23	0.0084

^a-cDifferent superscript letters within the same row means significant difference (P < 0.05).

COS, chitosan oligosaccharides; CON group, basal diet and raised under normal temperature (24°C); HS group, basal diet and raised under cycle heat stress (34°C from 10:00–18:00 and 24°C for the rest time); HSC group, basal diet with 200 mg/kg COS supplementation and raised under cycle heat stress.