Efeito da suplementação com Saccharomyces cerevisiae no perfil metabólico, inflamatório e reprodutivo de vacas leiteiras

Abstract

The objective of this study was to determine the effect of supplementation of yeast culture and enzymatically hydrolyzed yeast (CL- LHE) on reproductive performance, metabolic profile and inflammatory status of cows in a semi-extensive system since 21 days pre-calving to 150 days post partum. We used 30 multiparous female Dutch breed selected by the number of lactations (≥ 3 lactations) and negative history for clinics and reproductive diseases in the previous lactation. The cows were milked twice daily, with an average yield of 28 liters / cow / day, measured biweekly crop. The animals were divided into two groups according to treatment, CL IT group (n = 15) received on top 28 g of the product containing yeast culture and enzymatically hydrolysed yeast (Celmanax, Vi-COR, Mason City, IA) once a day with the diet. Have the cows in the control group (n = 14) did not receive the supplement. Blood samples for biochemical and biological analysis occurred on days -21, -14 and -7 for childbirth (pre-partum). After delivery of the samples were collected on days 0, 3, 7, 14, 21, 28, 35 and 42, and the 14th to the 35th day, it also collected weekly serum progesterone levels. Cows receiving CL-LHE had lower birth interval conception (CPI) average, 95.35 days (p = 0.02) and higher conception rate, 64.3% (p = 0.04). There was no effect on the return of cyclicity (p = 0.18) and on protein metabolism, PUN (p = 0.66), cholesterol (p = 0.45) and HDL-cholesterol (p = 0.38). The AGNE (p = 0.55) and BHB (p = 0.65) were not modified by treatment. Acute phase proteins were not affected and PON (p = 0.22), haptoglobin (p = 0.53) and albumin (p = 0.10). It was concluded that cows supplemented with more yeast yeast culture enzymatically hydrolyzed (CLLHE) from pre-birth through the first half of lactation did not alter the metabolic pattern, the inflammatory status and the resumption of ovarian activity. However, supplementation positively affects the reproductive performance and the production of milk with a shorter interval delivery design.