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An outlook on current recording and breeding programs of the Holstein cattle in Brazil. Repositório: BDPA Ano de publicação: 2007
Intensive grazing system increases milk productivity of Holstein and Jersey-Holstein crossbred dairy cows. In Brazil, despite the lack of accurate statistics on the contribution of each type of system in total milk production, it is known that pastures represent the main feed source in most production syst... ... Repositório: BDPA Ano de publicação: 2016
Energy and protein requirements of young Holstein calves in tropical condition. Our objective was to estimate the energy and protein requirements of Holstein young calves up to 87 days old. Forty-two Holstein calves aged 4 days were used. From these, ten were randomly selected an... ... Repositório: BDPA Ano de publicação: 2016
Methane emission intensities by Holstein and Holstein × Jersey crossbreed lactating cows in two Brazilian grazing systems. The aim of this study was the evaluation of methane emissions from pure Holstein and half Jersey, half Holstein high-producing lactating cows grazing 2 different forages. Repositório: BDPA Ano de publicação: 2014
Random regression models are suitable to substitute the traditional 305-day lactation model in genetic evaluations of holstein cattle in Brazil. The aim of this study was to compare two random regression models (RRM) fitted by fourth (RRM4) and fifth-order Legendre polynomials (RRM5) with a lactation model (LM) for evaluating Holstein cattle i... ... Repositório: BDPA Ano de publicação: 2015
Energy requirements of Holstein, Gyr, and Holstein x Gyr crossbred heifers using the respirometry technique. We aimed to determine the energy requirements for maintenance and gain of 18 prepubertal dairy heifers of three breed compositions (BC; Holstein, Gyr, and Holstein × Gyr). Diets were formulated for ga... ... Repositório: BDPA Ano de publicação: 2022
Emission intensities by Holstein and Holstein x Jersey crossbreed lactating cows in two Brazilian. In recent years the concern with methane (CH4) emission by enteric fermentation has become indispensable for dairy production systems. The aim of this study was to evaluate CH4 emissions from pure Hol... ... Repositório: BDPA Ano de publicação: 2014
Emission intensities by Holstein and Holstein x Jersey crossbreed lactating cows in two Brazilian grazing Systems. In recent years the concern with methane (CH4) emission by enteric fermentation has become indispensable for dairy production systems. The aim of this study was to evaluate CH4 emissions from pure Hol... ... Repositório: BDPA Ano de publicação: 2014
Nutritional requirements of energy, protein and macrominerals for maintenance and weight gain of young crossbred Nellore × Holstein bulls on pasture. The objective of this study was to estimate requirements of energy, protein and macrominerals of young Nellore/Holstein crossbreds bulls supplemented on pastures of Brachiaria decumbens Stapf. Thirty-... ... Repositório: BDPA Ano de publicação: 2012
Single-step genomic evaluation using an autoregressive multiple lactation model for Portuguese Holstein cattle. Repositório: BDPA Ano de publicação: 2018

Mostrando 1 - 10 de 231 resultados.

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