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Use of somatotropin in livestock production: growth in pigs

Use of somatotropin in livestock production: growth in pigs

Use of somatotropin in livestock production: 157-177

The effects of recombinant porcine somatotropin (rpST) on growth and carcass composition of pigs is reviewed. Doses of 30-60 micro g per kg body weight per day reduced feed intake by about 5%, increased growth rate, efficiency of feed conversion and lean content of the carcass by about 20, 20 and 10% resp., and reduced the fat content of the carcass by about 30%. A larger response was found in than in and in heavier than in lighter pigs.

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