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
doaj +1 more source
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 +4 more
doaj +1 more source
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 +5 more
doaj +1 more source
Karakteristik Calving Interval pada Sapi Jawa-Brebes di Kabupaten Brebes Jawa Tengah Indonesia
Jurnal Sain Veteriner, 2023 Sapi Jabres sebagai sumber daya genetik ternak lokal Indonesia harus dilindungi dan dilestarikan. Namun, kajian karakteristik kinerja reproduksi terutama calving interval pada sapi Jabres pada berbagai umur masih terbatas.
Agung Budiyanto +8 more
doaj +1 more source
The effect of pegbovigrastim on circulating neutrophil count in dairy cattle : a randomized controlled trial [PDF]
, 2018 Previous research in various species has shown that granulocyte-colony stimulating factor stimulates the production and release of neutrophils from bone marrow.
Bogado Pascottini, Osvaldo Américo +3 more
core +1 more source
Impact of age at first calving on performance traits in Irish beef herds
Journal of Animal Science, 2023 Reducing age at first calving (AFC) has been a challenge in beef herds. There is anecdotal evidence that herd owners choose to calve heifers older because of the perceived consequences of calving heifers at 24 mo of age compared to 36 mo on performance ...
A. Twomey, A. Cromie
semanticscholar +1 more source
Phenotypic effects of calving ease on the subsequent fertility and milk production of dam and calf in UK Holstein-Friesian heifers [PDF]
, 2011 The effect of calving ease on the fertility and production performance of both dam and calf was studied in approximately 50,000 and 10,000 UK Holstein-Friesian heifers and heifer calves, respectively. The first objective of this study was to estimate the
Alonso-Spilsbury +55 more
core +1 more source
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 +4 more
doaj +1 more source
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 +4 more
doaj +1 more source
Ages at Calving and Calving Intervals for Dairy Cattle in the United States
Journal of Dairy Science, 1989 Abstract Calving ages and intervals for cows first calving in 1966 to 1986 were examined for five dairy cattle breeds. For parities one through seven, mean age at each parity was lowest for Jerseys and highest for Ayrshires and Brown Swiss. Registered cows usually were older than grades for a specific parity.
Nieuwhof, G.J. +2 more
openaire +1 more source