Enzymatic hydrolysate of fish, spray-dried fish solubles, and soybean protein concentrate in milk replacers for calves.
Holstein calves (120) were fed milk replacers as the only nutrients from 4 to 46 days of age. All milk replacers contained 20% crude protein and differed in protein source: 1) 100% milk protein; 2) 67% milk protein, 33% soybean protein concentrate; 3) 67% milk protein, 33% enzymatic hydrolysate of fish; 4) 67% milk protein, 16.5% soybean protein concentrate, 16.5% enzymatic hydrolysate of fish; 5) 67% milk protein, 16.5% soybean protein concentrate, 16.5% spray-dried fish solubles; 6) 67% milk protein, 24.75% soybean protein concentrate, 8.25% spray-dried fish solubles. Substitution up to 33% of dietary protein with soybean protein concentrate or combinations of soybean, enzymatic hydrolysate of fish, or spray-dried fish solubles produced 14% lower weight gains than all milk protein, but 33% replacement with enzymatic hydrolysate of fish produced 27% lower weight gains. Feed consumed per kilogram of gain was least for all milk, most for 33% fish hydrolysate, and intermediate for other rations. Scour scores did not differ between diets.
D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000502:physiology*; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D005396:Fish Products; D005526:Food, Formulated; D008297:Male; D008894:Milk Proteins / Q000008:administration & dosage; D010940:Plant Proteins / Q000008:administration & dosage; D013025:Glycine max
D004044:Dietary Proteins; D008894:Milk Proteins; D010940:Plant Proteins