Table 6. Characteristics and morphological indexes of small intestine from the broiler chickens fed experimental diets for 35 days¹⁾

Treatment	CON2)	ZB	SPL	SEM	p-value
BW (kg)	2.16	2.50	2.26	0.070	0.119
Length (cm)	166.00	167.17	163.67	4.234	0.949
Weight (g)	52.25	53.78	56.91	2.356	0.737
Relative weight (g/kg BW)	25.03	20.44	24.44	0.837	0.037
Weight/ length (g/cm)	0.33	0.30	0.36	0.008	0.018
Duodenum
Villus height (μm)	1,101.75	1,168.07	1,262.17	31.747	0.207
Crypt depth (μm)	156.42	167.11	187.71	5.983	0.152
Villus height/crypt depth	7.04	7.01	6.77	0.142	0.743
Jejunum
Villus height (μm)	933.60b	910.32b	1,127.69a	31.543	0.001
Crypt depth (μm)	86.90	90.61	102.22	2.870	0.063
Villus height/crypt depth	10.84	10.09	11.05	0.235	0.223
Ileum
Villus height (μm)	372.65	402.39	440.68	21.399	0.471
Crypt depth (μm)	56.39	62.95	60.78	1.593	0.248
Villus height/crypt depth	6.58	6.45	7.21	0.304	0.601

Mean values represent 6 replicates per treatment; a chicken is the experimental unit.
CON, basal diet; ZB, 100 ppm of zinc bacitracin supplemented group; SPL, 250 ppm of sophorolipid supplemented group.
Different superscripts within the same row significantly differ (p < 0.05).
BW, body weight.