Effect of dry beet pulp on milk yield and milk composition in Chilean Holstein cows

Figures & data

Table 1. Composition of experimental diets.

Ingredient (dry matter kg/day)	Control diet	Treatment diet
Ground dry corn	5.16	4.99
Gluten feed	0.88	0.26
Canola meal	0.23	0.1
Beet pulp	–	1.34
Roasted soybean	0.89	0.98
Soybean meal 47%	3.47	3.2
Wheat brand	0.89	0.79
Minerals	0.15	0.15
Vitamin ADE	0.02	0.02
Calcium carbonate	0.1	0.1
Mycotoxin binder	0.05	0.05
Salt	0.02	0.02
Sodium bicarbonate	0.15	0.15
Wet brewers	1.92	1.68
Alfalfa hay	5.1	5
Corn silage	7.7	7.56
Alfalfa silage	0.84	1.49
Total	27.6	27.7
Cost (US$/cow/day)	7.25	7.25

Table 2. Nutrient and mineral composition of experimental diets.

Item	Control diet	Treatment diet
Nutrient
Dry matter (%)^a	52.8	52.9
Forage (%)	49.5	50.6
Crude protein (%)^a	17.04	16.9
Net energy for lactation (mCal/kg)^b	1.69	1.67
Acid detergent fiber (%)^a	19.7	20.3
Neutral detergent fiber (%)^a	31.5	32
Forage Neutral detergent fiber (%)	21.4	21.8
Lignin (%)^a	3.8	4.34
Non-fiber carbohydrates (%)^b	43.3	43.7
Sugars (%)^a	5.41	5.33
Starch (%)^a	26.02	24.8
Soluble fiber (%)^b	9.57	11.2
Fat (%)^a	3.5	3.36
Ash (%)^a	6.98	7.14
Minerals^a
Calcium (%)	0.73	0.77
Phosphorus (%)	0.44	0.40
Magnesium (%)	0.27	0.26
Potassium (%)	1.39	1.37
Sulfur (%)	0.25	0.23
Sodium (%)	0.27	0.28
Chloride (%)	0.34	0.34
Iron (ppm)	173.9	180.7
Zinc (ppm)	70.8	67.4
Copper (ppm)	16.1	16.2
Manganese (ppm)	31.5	31.9
Selenium (ppm)	0.39	0.37
Cobalt (ppm)	0.34	0.35
Iodine (ppm)	0.71	0.78

^a Laboratory determination.

^b Calculation by formula.

Figure 1. Average (SD) milk yield (kg/day) per treatment group. Treatments: molassed beet pulp (dash line); control (solid line).

Figure 2. Average (SD) solids and milk urea per treatment group at day 0, 15, 22, and 35. Treatments: molassed beet pulp (dash line); control (solid line).