Effect of feeding calcium soaps on double purpose cows.
Keywords:Fatty acids, ovarian activity, Insulin.
The effect of feeding with protected fats on double
purpose cows. The objective of this study was to determine
the reduction of post-partum anestrum in cows by supplying
protected fats. The study was conducted ad the Experimental
fi eld La Posta, Paso del Toro, Veracruz, México. The cows
were randomnly assigned to two groups: suplementation
with protected fats (GP; T1, n= 20) or tallow (SGP; T2,
n=20) at 2.7% of a dry weight-based diet. Milk production,
physical condition (CC), progesterone and tiroid hormone
levels were registered. (T3 and T4). Sources of variation
were diet, genetic group and number of calf births, and the
dependent variables PL were days to the fi rst estrus (DPE),
CC and meatabolite levels. Correlations among variables
were conducted. No effect (p>0,05) of treatments on milk
production were observed, but signifi cant effects (p<0,01) for
the fi st corpus luteum. Physical condition 4,5 had the best milk
production (p<0,01; 16,68±1,076 L/day) and lower number of
days to the fi rst estrum (p<0,05; 31,71±7,5 d). Tiroid hormones
did not show differences (p>0,05) among treatments: T1= 72,4
and T2 = 72,72 ug/dl. Insuline was higher (p<0,05) in T2 (6,87
UI) than in T1 (5,26 UI). It is concluded that the type of fat
did not affect milk production but stimulated the resumption
of ovarian activity and reduced the concentration of insulin in
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