Resumen

QUINTEROS POZO, Orlando Roberto; VARGAS BURGOS, Julio Cesar; BARBONA, Ivana  y  MARINI, Pablo Roberto. BLOOD METABOLIC INDICATORS OF DAIRY GENOTYPES GRAZING IN THEPROVINCE OF NAPO-ECUADOR. La Granja [online]. 2017, vol.26, n.2, pp.119-130. ISSN 1390-8596.  https://doi.org/10.17163/lgr.n26.2017.10.

The aim of this study was to evaluate the energy-blood protein metabolism in dairy cows four genotypes first lactation under grazing in Canton Arosemena Tola, Napo, Ecuador. 36 dairy cows in first parity crosses of the genotypes were evaluated: Bos Indicus x Gir (GIR), Bos Indicus x Brown Swiss (BS), Bos Indicus x Jersey (J) and Bos indicus x Sahiwal (S). Blood samples coccygeal vein on days 60 and 21 were taken before of calving, the time of calving and at 30, 60 and 90 days after of calving. Values ​​were determined in plasma, glucose, urea, creatinine, and total protein. None of the variables showed significant differences (p ≥0.05) between races and the values ​​obtained for all they were below normal values ​​for dairy cows. Glucose showed no significant difference (p ≥0.05) over time. However, for urea, creatinine and total proteins were significant differences (p≥0,001) over time. One set was used Local regression smoothing parameter equal to 0.8 was to study how the trajectory of the variable over time. A mixed linear model for each variable then adjusted, considering a node in cases for which a change in the trajectory was observed at some particular time (as noted in the graph 1, 2, 3 Local regression). It was concluded that for the four dairy genotypes studied no differences were found in the concentration of metabolic indicators.

Palabras clave : Creatinine; gene groups; glucose; grazing system; total proteins; urea.

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