Zobrazeno 1 - 10
of 566
pro vyhledávání: '"N. Lopez-Villalobos"'
Publikováno v:
Journal of Dairy Science, Vol 107, Iss 5, Pp 2930-2940 (2024)
ABSTRACT: Similar to all dairy systems internationally, pasture-based dairy systems are under increasing pressure to reduce their greenhouse gas (GHG) emissions. Ireland and New Zealand are 2 countries operating predominantly pasture-based dairy prod
Externí odkaz:
https://doaj.org/article/71fc1ce5c6854e5591958e64fb3a42c2
Publikováno v:
Journal of Dairy Science, Vol 107, Iss 3, Pp 1500-1509 (2024)
ABSTRACT: This study aimed to assess the milk production data for New Zealand dairy goats in either a standard lactation (SL; ≤305 d in milk [DIM]) or extended lactation (EL; >305 and ≤670 DIM) using a random regression (RR) with third- and fifth
Externí odkaz:
https://doaj.org/article/f67a3d019522499ab59cfc40974863fb
Autor:
G. Buonaiuto, G. Visentin, A. Costa, G. Niero, L. Degano, D. Cavallini, L.M.E. Mammi, A. Palmonari, A. Formigoni, N. Lopez-Villalobos
Publikováno v:
Animal, Vol 18, Iss 4, Pp 101128- (2024)
Longevity in dairy and dual-purpose cattle is a complex trait which depends on many individual and managerial factors. The purpose of the present study was to investigate the survival (SURV) rate of Italian Simmental dual-purpose cows across differen
Externí odkaz:
https://doaj.org/article/a9c57c297935414897e058a848484212
Publikováno v:
JDS Communications, Vol 4, Iss 4, Pp 329-333 (2023)
Twice-a-day (TAD) milking during the whole lactation is practiced in about 55% of New Zealand herds and once-a-day (OAD) milking during the whole lactation in about 10% of herds. The remainder of farmers use a mixture of TAD and OAD. Results from lon
Externí odkaz:
https://doaj.org/article/16af8376fd014d91a6ce798c511fc7eb
Fertility and survival of Swedish Red and White × Holstein crossbred cows and purebred Holstein cows
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 4, Pp 2475-2486 (2023)
ABSTRACT: Swedish Red and White × Holstein (S×H) cows were compared with pure Holstein (HOL) cows for fertility and survival traits in 2 commercial dairy farms in central-southern Córdoba province, Argentina, over 6 years (2008–2013). The follow
Externí odkaz:
https://doaj.org/article/fbf34c7bb8e04274ad792a72aff3cbcf
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 3, Pp 1910-1924 (2023)
ABSTRACT: The objectives of this study were to estimate the genetic and phenotypic correlations and heritabilities for milk production and fertility traits in spring-calved once-daily (OAD) milking cows for the whole season in New Zealand and compare
Externí odkaz:
https://doaj.org/article/01a0458fdba94db6866e0a43409bc552
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 1, Pp 364-380 (2023)
ABSTRACT: The objectives of this study were to estimate genetic parameters and individual and maternal breed, heterosis, and recombination loss effects for milk production and fertility traits of Holstein Friesian (F), Jersey (J), and crossbred Holst
Externí odkaz:
https://doaj.org/article/e445152b48614f3ca988d7cd7f913572
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 11, Pp 8911-8923 (2022)
ABSTRACT: The objective of this study was to evaluate the reproductive performance of New Zealand dairy cows with different milking regimens. A total of 2,562 herds calving in 2017 met the criteria for inclusion in this study. The herds were classifi
Externí odkaz:
https://doaj.org/article/45057cf31cf64fa1ae5571a3b786df12
Publikováno v:
JDS Communications, Vol 2, Iss 2, Pp 51-54 (2021)
A deterministic model was developed in 1998 to evaluate the concurrent effects of selection and crossbreeding on the rate of genetic gain and increases in productivity of New Zealand dairy cattle over the ensuing 25-yr period. The predictions of toda
Externí odkaz:
https://doaj.org/article/1854544e21034cfb876fc1843933321f
Publikováno v:
JDS Communications, Vol 2, Iss 1, Pp 21-26 (2021)
The main objective of this study was to investigate whether altering dietary crude protein (CP) through the supplementation of urea to a basal pasture diet fed to dairy cows accurately modeled N-partitioning relationships. To test this, we first need
Externí odkaz:
https://doaj.org/article/080dbfbba28e482ba91ce7bba728bd53