Table 5. Effects of dietary fiber sources supplementation in lactation diet on milk composition

	Treatment (%)1)				SEM	p-value
	Control	BP	BPPK	PK
Casein (%)
Colostrum	6.89	7.26	7.96	5.69	0.532	0.56
21st day of lactation	3.79	4.09	3.91	4.00	0.123	0.68
Fat (%)
Colostrum	7.82	5.32	8.33	6.90	0.866	0.68
21st day of lactation	7.68	6.78	7.37	7.11	0.435	0.92
Protein (%)
Colostrum	10.02	10.65	11.63	10.31	0.785	0.92
21st day of lactation	4.79	5.27	4.97	5.12	0.144	0.70
Lactose (%)
Colostrum	3.88	3.82	3.65	4.06	0.133	0.78
21st day of lactation	5.52	5.44	5.49	5.46	0.231	0.99
Total solid (%)
Colostrum	24.11	22.29	26.47	23.75	1.182	0.72
21st day of lactation	19.54	19.07	19.39	19.25	0.521	0.99
Solids not fat (%)
Colostrum	98.40	81.00	95.00	87.60	3.682	0.48
21st day of lactation	112.00	123.50	117.68	123.00	3.192	0.59

Treatment: Control, corn-soybean meal (SBM)-DDGS based diet; BP, corn-soybean meal (SBM)-DDGS based diet with 3% of beet pulp; BPPK, corn-soybean meal (SBM)-DDGS based diet with 1.5% of beet pulp and 2% of palm kernel meal; PK, corn-soybean meal (SBM)-DDGS based diet with 4% of palm kernel meal.
DDGS, distiller’s dried grains with solubles.