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Abstract

Correlated selection response of United States Holstein bulls was estimated in the provinces of Bío-Bío and Malleco (Chile). The aim of this research was to obtain indicators that could estimate the profitability obtained by chilean farmers due to the investment in imported semen. Information for...

Author(s)
Jara, A.; Guzmán, A.; Peña, M.; García, M. J.; Barría, N.
Publisher
Facultad de Ciencias Veterinarias, Universidad Austral de Chile, Valdivia, Chile
Citation
Archivos de Medicina Veterinaria, 2005, 37, 1, pp 15-22
Abstract

This study was performed using a database of the Dairy Control Service of Bioleche Ltd., Los Angeles, Chile. The information was analysed by a mathematical model that evaluated urea content as a dependent variable of the following factors: ordinal number of calvings, calving season, daily level of...

Author(s)
Pedraza G., C.; Mansilla M., A.; Merucci D., F.; Pinedo, P.; Contreras C., H.
Publisher
Instituto de Investigaciones Agropecuarias, Chillán, Chile
Citation
Agricultura Técnica, 2006, 66, 3, pp 264-270
Abstract

Author(s)
Kruze, J.
Publisher
Wageningen Academic Publishers, Wageningen, Netherlands
Citation
Mastitis in dairy production: current knowledge and future solutions, 2005, pp 123-128
Abstract

Data consisted of standardized first lactation records extracted from the data files of the Northeast US, Chile, and Argentina. The selection response was estimated by a linear regression that included herd-year-season as fixed effect, PTA and age of the sire. Responses for milk and fat by country...

Author(s)
Barría, N.; Verdugo, R.; Casanova, D.; Jara, A.
Publisher
Institut National de la Recherche Agronomique (INRA), Montpellier, France
Citation
Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002. Session 18, 2002, pp 1-3
Abstract

12 papers are presented: Development of a database management system; Effect of blood metabolites, body condition and pasture management on milk yield and post-partum intervals in dual-purpose cattle farms in Mexico; Metabolic profiles in dairy cattle in tropical and subtropical countries; Blood...

Citation
Preventive Veterinary Medicine, 1999, 38, 2/3, pp v + 149 pp.
Abstract

The performance of the daughters of New Zealand Friesian (Nz) sires, British Friesian (Br) sires and Black Chilean Friesian (FN) cows were studied. The cows were in a pasture system, having a late winter calving, and maintained at a university in Chile. Two comparisons were made: 50% Nz vs. FN (C1) ...

Author(s)
García F., X.; González V., H.; Magofke S., J. C.; Cuevas F., A.
Publisher
Facultad de Ciencias Agronómicas, Universidad de Chile, Santiago, Chile
Citation
Avances en Producción Animal, 2001, 26, 1/2, pp 63-78
Abstract

For 2 consecutive years, a milk production system was evaluated at Humán Experimental Station, Los Angeles, Chile (37°28'Lat. S. and 72°23'Long. W.). 4 ha of lucerne were used alternately for rotational grazing at the prebud stage and for cutting for hay production at the 10% bloom stage. Maize...

Author(s)
Jahn B., E.; Vidal V., A.; Soto O., P.
Publisher
Instituto de Investigaciones Agropecuarias, Chillán, Chile
Citation
Agricultura Técnica, 2000, 60, 1, pp 43-51
Abstract

During the winter of 1994, a survey of productive and reproductive parameters was undertaken in the south-central part of Chile on 71 cows from 4 small farms with low milk production (<3000 litres/year). Cows were allowed to graze a perennial ryegrass and white clover pasture supplemented with...

Author(s)
Orellana, P.; Recabarren, S.; Lobos, A.; Islas, A.; Briones, M.; Rubilar, L.
Citation
Preventive Veterinary Medicine, 1999, 38, 2/3, pp 207-215
Abstract

The milk and milk fat production, standardized to 305-day lactations, was compared for 89 cows naturally infected with bovine leukosis virus (BLV) and 104 uninfected cows. The animals were Holstein and Holstein × Chilean-Friesian, from a herd of the Metropolitana region of Chile, representing...

Author(s)
Villouta C., G.; Contreras L., M.; Agüero E., H.; Pedraza G., C.; Montes O., G.
Citation
Avances en Ciencias Veterinarias, 1992, 7, 2, pp 191-196
Abstract

Milk production by healthy and clinically mastitic (CM) cows was compared after adjustment of the γ-function of Wood's lactation curve to allow for decline in lactation persistency [see Agricultura Técnica (Santiago) (1988) 48, 341]. Data on 216 complete lactations of healthy and CM cows showed...

Author(s)
Pedraza, G. C.
Citation
Agricultura Técnica (Santiago), 1991, 51, 4, pp 298-305

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