The Benefits of Adding Sulfur and Urea to a Concentrate Mixture on the Utilization of Feed, Rumen Fermentation, and Milk Production in Dairy Cows Supplemental Fresh Cassava Root

Table 6

Effect of sulfur and urea levels on milk yield and composition in dairy cows.

Items	Sulfur-1		Sulfur-2		SEM	value
	Urea-1	Urea-2	Urea-1	Urea-2		Sulfur	Urea	Sulfur  urea
Milk yield, kg/d	10.78	10.82	10.92	10.91	0.48	0.814	0.969	0.966
3.5% FCM, kg/d	11.00	10.97	10.82	11.43	0.45	0.761	0.538	0.494
Fat, g/kg	36.20	35.80	35.80	36.50	0.09	0.867	0.867	0.618
Protein, g/kg	35.10	35.40	35.30	34.20	0.09	0.614	0.649	0.467
Lactose, g/kg	47.50	47.20	46.90	45.90	0.04	0.051	0.125	0.426
Solid-not-fat, g/kg	91.40	93.60	94.40	95.20	0.12	0.084	0.229	0.554
Total solids, g/kg	122.50	123.40	123.10	122.80	0.21	0.976	0.901	0.781
Milk SCN^−, ppm	7.45^a	7.23^a	8.65^b	8.63^b	0.24	0.0001	0.610	0.682
SCC, × 10^3, cells/ml	314.87^a	280.75^a	246.50^b	211.50^b	17.23	0.001	0.067	0.983

Sulfur-1 and sulfur-2 = sulfur addition into concentrate at 10 g/kg DM and 20 g/kg DM. Urea-1 and urea-2 = urea addition into concentrate at 10 g/kg DM and 20 g/kg DM; SEM = standard error of mean; FCM = fat corrected milk (3.5% FCM = 0.432 + (0.1625 × milk fat) × milk yield); SCC = somatic cell count; sulfur  urea = interaction effect between sulfur and urea; ^a,bmeans in the same row with different superscript letter are accepted as significantly different ().