Effect of recombinant bovine somatotropin and calcium salts of long-chain fatty acids on milk from Italian buffalo.
Fifty-one lactating Italian river buffalo were used in an 84-d study to evaluate the effects of recombinant bovine somatotropin (bST) and Ca salts of long-chain fatty acids on productive performance. Treatments were 1) control diet, 2) the control diet plus 0.3 kg/d of added Ca salts of long-chain fatty acids, 3) the control diet plus 320 mg of recombinant bST injected every 21 d for four cycles, and 4) the control diet plus 0.3 kg/d of added Ca salts of long-chain fatty acids and 320 mg of recombinant bST administered as previously described. Administration of bST and Ca salts of long-chain fatty acids increased milk production. Milk fat percentage was not affected by treatments. The percentage of short-chain fatty acids in milk fat was reduced by the addition of Ca salts. Medium-chain, long-chain, and unsaturated fatty acids in milk fat were increased by bST treatment. Milk protein percentage was decreased by the addition of Ca salts of long-chain fatty acids. Milk casein content, as a percentage of total protein or as a percentage of true protein, was unaffected by bST. Body condition score was lowered by bST administration, but the addition of Ca salts of long-chain fatty acids reduced body condition loss in buffalo that were treated with somatotropin.
Polidori
F
F
Institute of Animal Nutrition, University of Milan, Italy.
Sgoifo Rossi
C A
CA
Senatore
E M
EM
Savoini
G
G
Dell'Orto
V
V
D000818:Animals; D002020:Buffaloes / Q000502:physiology*; D002118:Calcium; D002417:Cattle; D005227:Fatty Acids / Q000378:metabolism / Q000494:pharmacology*; D005260:Female; D013006:Growth Hormone / Q000494:pharmacology*; D050356:Lipid Metabolism; D008892:Milk / Q000378:metabolism*; D008894:Milk Proteins / Q000378:metabolism; D011994:Recombinant Proteins / Q000494:pharmacology; D012492:Salts
D005227:Fatty Acids; D008894:Milk Proteins; D011994:Recombinant Proteins; D012492:Salts; D013006:Growth Hormone; D002118:Calcium