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1997; Kansas Agricultural Experiment Station contribution; no. 98-100-S; Report of progress (Kansas Agricultural Experiment Station and Cooperative Extension Service); 792; Dairy; rbST; Heat stress; Lactating cows
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Full-Text Articles in Life Sciences
The Effects Of Rbst (Posilac®) On Heat Stressed, Lactating, Dairy Cows (1997), John F. Smith, John E. Shirley, Evan C. Titgemeyer
The Effects Of Rbst (Posilac®) On Heat Stressed, Lactating, Dairy Cows (1997), John F. Smith, John E. Shirley, Evan C. Titgemeyer
Kansas Agricultural Experiment Station Research Reports
Two hundred cows located on a commercial dairy in Mesquite, NM were used to evaluate response to rbST (POSILAC®) during heat stress in the summer of 1996. Cows were paired by days in milk (average = 153 d at initiation of experiment), parity, and milk yield (average = 92 lb at start of experiment). Prior to initiation of the experiment, all cows received rbST, then rbST treatment was discontinued for one cow from each pair. Milk production was monitored for 4 months. No interactions were detected between lactation number and treatment. Cows maintained on rbST gained .09 of a score …