Ocampo CL, Morales M, Basurto CH, Auró AA

Language: English/Spanish
References: 8
Page: 137-139
PDF size: 173.09 Kb.

Text Extraction

Effectivity of bovine somatotropin (BST), in an oil vehicle, was evaluated on milk production and weight gain in F₁ Sahiwall Holstein-calves in Martinez de la Torre, Veracruz, Mexico. Twenty F₁ Sahiwall-Holstein cows were selected according to body condition, health status and milk production. Animals were divided in 2 groups of 10 cows each. Group 1 was injected subcutaneously 250 mg of BST every 14 days, and Group 2 did not receive any treatment and was the control. The milk-per day average in both groups was from 60-120 days within an experimental period of 14 weeks. All cows grazed free and were milked once a day. Milk production in Group 1 increased 18% (kg/day) in relation to Group 2 (P ‹ 0.05). Nevertheless, calves body condition and weight gain proved not to be statistically significant. No adverse effects were observed. Results indicate that BST at a 250 mg dosage increases milk production in the tropics effectively; a factor which represents a great potential for the dairy industry in these regions.

REFERENCES

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