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| tape measure, research, medline, national library of medicine, xbox, gcs, fat track, porcelain creations, films, luggage, obese, idealbody weight, dietary nutrients, ldl, ground squirrel, heat pack, myoquake, muscle, pig weaning, fitness software, analysis, tanita, | The feeding period averaged 162 days. Fat content of the diet was increased by adding 1.5 lb safflower seeds to the daily ration. At the beginning of the breeding season, heifers were moved from the feedlots to irrigated pasture and supplemental feeding was stopped. Heifers were bred in a 54 day AI breeding season. Results are summarized in Table 3. Diet effects on percent puberal at the beginning of the breeding season tended to be affected, but diet effects on age at health news puberty in heifers that reached puberty by the beginning of breeding or on final pregnancy rate health news were not different. Sire effects were important for all three endpoints with the general pattern being that Limousin-sired were the oldest with fewest puberal at the beginning of the breeding season, Piedmontese the youngest and highest percentage puberal at begin breeding, and Herefords were intermediate. |
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| Diets were group fed in research dry lot for an average of 65 days precalving with supplemental fat feeding ending at calving. Estrus was synchronized with two research injections of prostaglandin and bred in a 35-37 day breeding period. Results are summarized in Table 2. There did not appear to be differences among the three fat sources so the comparisons discussed will be for the average of the diets containing supplemental fat vs. the control diet. Feeding fat resulted in a non-significant increase in calf birth weight and in the incidence and research severity of calving difficulty. But, the interesting increase found was a 13 percentage point increase in fall pregnancy rate and a 30 lb increase in calf weaning weight. A study on effects of feeding fat to replacement heifers was also conducted. The study involved 246 weaned, crossbred heifers sired by Hereford, Limousin, or Piedmontese sires that were held in feedlots and fed diets containing either 1.9% or 4.4% fat from 254 days of age until they reached puberty or until the breeding season started. |
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