Results 21 to 30 of about 6,252 (157)

Reproductive qualities of dairy cows at different levels of milk yield

Аграрная наука Евро-Северо-Востока, 2021
The article presents the results of the analysis of the reproductive ability of cows depending on the level of their milk productivity. The studies were conducted in the Republic of Mari El on cows of the Holstein black-and-white breed (n = 3828).
Svetlana V. Titova
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Desempeño reproductivo de vacas Gyr lechero en un sistema a pastoreo del trópico ecuatoriano

La Técnica: Revista de las Agrociencias, 2020
Reproductive performance of Gyr dairy cows in a grazing system of the Ecuadorian Tropic Resumen El objetivo del trabajo fue evaluar la eficiencia reproductiva en vacas lecheras Gyr en condiciones de pastoreo del trópico ecuatoriano.
Alicia Esther Farfán Talledo, Wilter Fernando Borja Veloz, Luis Santiago Quiroz Fernández, Juan José Zambrano Villacís, Pablo Roberto Marini   +4 more
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Genetic analysis of reproductive performance of Frieswal cattle at Military Farm, Ambala [PDF]

Veterinary World, 2015
Aim: This study was carried out to investigate the genetic analysis of reproductive performance of Frieswal cattle at Military Farm, Ambala. Materials and Methods: A total number of 3005 lactation records of 1147 Frieswal cows over a period of 15 years ...
Jagdeep Kumar, Y. P. Singh, Sushil Kumar, Rajbir Singh, Ravinder Kumar , Pradeep Kumar   +5 more
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The Influence of Synthetic Analogues of PgF2 on the Evolution of Puerperal Period and the Duration of the Interval from Calving to the First Estrus in Cows

Scientific Papers Animal Science and Biotechnologies, 2023
Puerperal period is the most critical period from the productive life of females, at the borderline between physiologic and pathologic. In this stage some reproductive turbulence may appear (uterine subinvolution, uterine infections, ovary inactivity ...
Nicolae Păcală, Casiana Șipețan, Ioan Bencsik, Dorel Dronca, Ada Cean, Ion Carabă, Marioara Nicula, Marinel Șipețan, Nenad Nedeljkovic, Cosmin Ganță   +9 more
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Genotype × environment interaction for fertility and milk yield traits in Canadian, Mexican and US Holstein cattle

Spanish Journal of Agricultural Research, 2017
The objective of this study was to evaluate genotype × environment  interaction (G×E) between Canada, the United States and Mexico for fertility and milk yield traits using genetic correlations between countries estimated from genetic evaluations of ...
Hugo H. Montaldo, Alejandra Pelcastre-Cruz, Héctor Castillo-Juárez, Felipe J. Ruiz-López, Filippo Miglior   +4 more
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Parturition intervals and distributions of parturitions by months of buffalo in Southern and South-eastern Brazil

Italian Journal of Animal Science, 2010
Reproductive rate is an important component of economic success in livestock production. Parturition interval (IEP) is a direct measure of the productivity of the animal. Long IEP reduce the number of calves produced per year.
J.C. De Souza, J.A. DeFreitas, P.B. Ferraz Filho, A.M. Jorge, A.A. Ramos, C.H.M. Malhado, W.R. Lamberson   +6 more
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Genetic evaluation of reproduction performance of Jersey × Red Sindhi crossbred cows [PDF]

Veterinary World, 2016
Aim: The present investigation was undertaken to study the reproduction performance and effect of non-genetic factors on reproduction performance of Jersey crossbred cows. Materials and Methods: Data on 355 Jersey crossbred cattle maintained at the Post-
S. Vinothraj, A. Subramaniyan, R. Venkataramanan, Cecilia Joseph, S. N. Sivaselvam   +4 more
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ASSOCIATION OF TRANSFERRIN POLYMORPHISM WITH REPRODUCTVE TRAITS OF GIR CATTLE [PDF]

Exploratory Animal and Medical Research, 2012
The present study on 28 known genotype of Gir cattle was carried out to investigate the association of transferrin polymorphism with different reproductive traits at the Department of Animal Genetic and Breeding, West Bengal University of Animal and ...
R. Guha, P.K. Senapati, S. Taraphder
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Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt

Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 2001
Records of 71 buffaloes, raised under a semi-intensive production system in a university herd, collected from 1993 to 1999, were used to study the effect of some nongenetic factors on milk performance and causes of calf mortality.
M. Mourad, S. Rashwan
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PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF HOLSTEIN-FRIESIAN COWS IN PAKISTAN [PDF]

Pakistan Veterinary Journal, 2005
Productive and reproductive performance parameters of Holstein-Friesian cows kept at the Livestock Experiment Station, Bhunikey (Pattoki), District Kasur for the period from 1991 to 2000 were studied.
A. Sattar, R. H. Mirza, A. A. K. Niazi and M. Latif
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