A total of 245 male Cobb broilers (10 to 18 d old) were used to determine the total-tract nutrient digestibility (TTND) of dry matter (DM), mineral matter (MM), metabolizable energy (ME), nitrogen retention (NR), calcium (Ca), phosphorus (P) and neutral detergent fiber (NDF) of sorghum, with or without multi-carbohydrase (Carb) and phytase (Phy) enzyme supplementation. The birds were allotted in a completely randomized design with 5 treatments and 7 replications (7 birds per replication). The experimental period was 8 d, 5 d of adaptation and 3 d of total feces collection. The treatments were: Control diet (CD); CD + 30% sorghum (Sorghum); CD + 30% of sorghum + 200 mg/kg of Carb (Sorghum + Carb); CD + 30% of sorghum + 50 mg/kg of Phy (Sorghum + Phy); CD + 30% of sorghum + Phy + Carb (Sorghum + Phy + Carb). The diets were formulated to meet or exceed the nutrient requirements (Rostagno et al., 2011) for broiler chickens. The TTND coefficients of sorghum nutrients are presented in the table below. The Carb and Phy, isolated or in combination, improved (P < 0.05) the TTND of sorghum. Positive effects of Carb and Phy supplementation in sorghum-based diets for broiler chicks are associated with reduction in the antinutritional factors from ingredient. In general, the enzymes improved the TTND of sorghum for young broiler chickens, however, when isolated, Carb and Phy were effective to improve only NR and ME. Table 1. Apparent digestibility coefficients and metabolizable energy of sorghum for broiler chickens

Item	DM (%)	NR(%)	ME(kcal·kg−1)	MM(%)	Ca(%)	P(%)	NDF(%)
Diet
Sorghum	84.16	63.28	3,887	38.85	56.29	55.12	54.19
Sorghum + Carb	89.49	65.80	3,913	43.46	60.95	57.01	55.28
Sorghum + Phy	90.65	73.50	4,117	42.65	60.52	57.10	56.17
Sorghum + Carb + Phy	90.33	72.54	3,995	38.67	64.63	59.69	57.57
SD by Diet	1.55	2.55	60.99	2.92	3.45	2.66	4.19
P-values for contrasts1
C1	<0.001	<0.001	<0.001	0.044	0.001	0.024	0.252
C2	0.729	0.023	0.476	0.004	0.023	0.044	0.352
C3	0.178	<0.001	<0.001	0.613	0.819	0.949	0.696

¹C1 = Sorghum vs. Sorghum + Carb; Sorghum + Phy; Sorghum + Carb + Phy; C2 = Sorghum + Carb; Sorghum + Phy vs. Sorghum + Carb + Phy; C3 = Sorghum + Carb vs. Sorghum + Phy.