Emilio Vargas
University of Costa Rica
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Emilio Vargas.
Animal Feed Science and Technology | 1998
J.Ml Sánchez; Henry Soto; Emilio Vargas
Setaria anceps is a pasture grass commonly utilized in dairy farms in the humid tropics. It is noted for its good dry matter yield and nutritional quality. However, a high incidence of milk fever among dairy cows grazing this pasture has been claimed by the Costa Rican farmers. We therefore collected and analyzed 48 samples of S. anceps in the Quesada district of San Carlos county in Costa Rica to determine the mineral composition and potential milk fever risk factors associated with consumption of this pasture. An equal number of samples of the pasture Cynodon nlemfuensis were taken as a control. This is the most common pasture of the area and a low incidence of milk fever has been related to its consumption. Forage samples were measured for Ca, P, Mg, K, Na, S and Cl and the Cation–Anion Balance (CAB, mEq kg−1 of DM) was calculated as [(Na++K+)−(S2−+Cl)]. Values for Ca, P, Mg, K, Na, S and Cl in S. anceps were, 0.25, 0.19, 0.24, 3.5, 0.55, 0.17 and 0.84% of dry matter and for C. nlemfuensis 0.31, 0.22, 0.24, 2.67, 0.04, 0.27 and 0.59. CAB was 861 mEq kg−1 of DM in S. anceps and 500 in C. nlemfuensis. The significantly (**P<0.01) higher CAB, K and Na values, and lower (**P<0.01) S values in S. anceps strongly suggest that its electrolyte composition and balance could be key nutritional risk factors increasing the susceptibility of dairy cows to milk fever incidence. Since average calcium consumption in the area is in the order of 45 g cow−1 day−1, cows grazing S. anceps should be offered low calcium diets (less 20 g cow−1 day−1) to reduce their susceptibility to milk fever.
Agronomía Costarricense | 2003
Emilio Vargas; Mario Zumbado
Agronomía Costarricense | 1995
Carlos Campabadal; Emilio Vargas; Miguel Fonseca
Agronomía Costarricense | 1993
Emilio Vargas; L Mcdowell
Agronomía Costarricense | 2001
Carlos Tobía; Emilio Vargas; Augusto Rojas; Henry Soto
Electronic Government, An International Journal | 2018
Gustavo Adolfo González Bermúdez; Emilio Vargas; Linneth Ceciliano Calderón; Luis Alejandro Valencia Páez; Rafael Quesada Mora
Agronomía Costarricense | 2000
Carlos Tobía; Emilio Vargas
Agronomía Costarricense | 2000
Carlos Tobía; Emilio Vargas
Agronomía Costarricense | 1992
Emilio Vargas; C Campabadal
Agronomía Costarricense | 1986
Jorge Ml. Sánchez; Carlos Campabadal; Emilio Vargas; H. Fonseca