Factor affecting the useful life of dual-purpose cows
Journal Title: Revista MVZ Cordoba - Year 2013, Vol 18, Issue 2
Abstract
Objective. Determine the effect of non-genetic factors and breed group, on the useful life (UL) of dual-purpose cows. Materials and methods. Records from 2098 cows were used in the analysis which included all the females who entered to the reproductive program and were culled or died. The data came from two dual-purpose commercial herds located in the basin of the Lake of Maracaibo in Trujillo State. The UL was quantified in number of calving upon culling. The parameters included in the model were: herd (H: AG, VV), year of the first calving (Y1C: 1995-2006), season of the first calving (S1C: January-March, April-May, June-August, September-December), breed group (BG: Zebu, 50%Zebu50European; ZE, Milking Crossbred; MC) and the interaction HxBG y Y1CxBG. Results. The UL average was 2.63 (0.07) calvings. All the factors had highly significant effects (p<0.01) on UL, however, H did not affect UL. It is interesting to highlight that HxBG and Y1CxBG interactions were highly significant (p<0.01) indicating that breed groups behave differently in every herd and during the course of the years. Conclusions. Non-genetic factors and breed group have a high influence on UL.
Authors and Affiliations
Leidys Murcia R, Ing Agr| Universidad Central de Venezuela. Instituto de Producción Animal, Facultad de Agronomía. Apartado Postal 4579. Maracay, estado Aragua. Venezuela., Gonzalo Martínez G, Ph. D *| Universidad Central de Venezuela. Instituto de Producción Animal, Facultad de Agronomía. Apartado Postal 4579. Maracay, estado Aragua. Venezuela.Correspondencia: gemg7235@gmail.com
Keywords
Related Articles
- EP ID EP3306
- DOI -
- Views 395
- Downloads 18
MATHEMATICAL MODEL APPLIED TO LACTATION CURVE IN LIVESTOCK BOVINE DOUBLE PURPOSE
To select a mathematical model for the lactation curve of milk production in bovine females.During 11 months, the production of milk was studied in 500 bovine females double purpose Bos taurus x Bos indicus, at the Sava...
Effect of supplementing with protected fat on meat production and quality of mexican dual purpose steers
Objective. To evaluate performance and meat quality response to protected fat (PF) addition to diets for dual purpose steers. Materials and methods. Forty five commercial crossed steers (B. taurus x B. indicus) were used...
TUMOR VENÉREO TRANSMISIBLE (TVT) DE LOCALIZACIÓN EXTRAGENITAL
In the present report the authors document a clinical casa of transmissible veneral tumor (TVT) of cutaneous localization in a female virginal dog.
Characterization of propolis from municipality of Caldas obtained through two collection methods
Objective. To determine the physicochemical characteristics and the antimicrobial activity in propolis from Apis mellifera, collected in the municipality of Caldas through two harvesting procedures. Materials and methods...
AGRONOMIC EVALUATION OF FORAGES SORGHUM (Sorghum vulgare) AND MILLO GENOTYPES FOR FEEDING BOVINE IN THE SINÚ VALLEY
Objective. To evaluate seven millo and five sorghum genotypes to determine forage yield and to use it in feeding bovine in Sinú valley, Colombia. Materials and methods. Sorghum (Sorghum vulgare) and millo seeds were hybr...