5 documents found, page 1 of 1
Associations of days open with milk urea nitrogen and other herd traits in dair...
Almeida,Rodrigo de; Doska,Maria Cecília; Horst,José Augusto; Valloto,Altair Antônio; Santos,Geraldo Tadeu dos; Lima,Luciano Soares deABSTRACT We evaluated the association of monthly milk urea N (MUN) concentrations before conception and days open in high-producing dairy cows from commercial herds in Southern Brazil. Other herd traits were also investigated regarding their relationship with days open. A database containing 16,569 monthly test-day records (obtained from 3,926 lactations of 2,145 cows) for productive, reproductive, and milk qua...
Performance of dairy goats fed diets with dry yeast from sugar cane as protein ...
Lima,Luciano Soares de; Alcalde,Claudete Regina; Freitas,Hanna Sakamoto; Molina,Bruna Susan de Labio; Macedo,Francisco de Assis Fonseca deThe effects of inactive dry yeast (Saccharomyces cerevisiae) from sugar cane were studied in 18 primiparus Saanen dairy goats (51.07±1.43) on dry matter intake and digestibility, milk production and quality. Animals were distributed in a completely randomized design during 90 days (from day 60 of milking). Diets were composed of soybean meal; soybean meal + dry yeast; or dry yeast, as protein sources, and groun...
Sources of variation in milk urea nitrogen in Paraná dairy cows
Doska,Maria Cecília; Silva,Delma Fabíola Ferreira da; Horst,José Augusto; Valloto,Altair Antônio; Rossi Junior,Paulo; Almeida,Rodrigo deThe present study was conducted to determine the relationship between milk urea nitrogen (MUN) and milk yield, fat and protein contents, breed and season effects, parity and days in milk in dairy cows from Paraná State, Brazil. A total of 127,428 test-days from 16,013 dairy cows belonging to 96 herds enrolled in an official milk recording program were analyzed. Multivariate mixed model methodology was used to d...
Monitoring the nutritional and reproductive state of dairy cows through the pre...
Grande,Paula Adriana; Santos,Geraldo Tadeu dos; Ribeiro,Hilton; Damasceno,Júlio César; Alcalde,Claudete Regina; Barbosa,Orlando Rus; Horst,José AugustoThe effects of farm, parity (PO) and month of parturition on milk production, percentage of fat and protein, somatic cell count (SCC), and milk urea nitrogen (MUN) concentration were assessed on four specialized dairy farms using 120 cows. Also, the effects of MUN on gestation rate (GR) and artificial insemination rate (AIR) in early lactation were studied. The parameters of production and milk quality were sim...
Curva de lactação e qualidade do leite de cabras Saanen recebendo rações com di...
Zambom,Maximiliane Alavarse; Alcalde,Claudete Regina; Martins,Elias Nunes; Santos,Geraldo Tadeu dos; Macedo,Francisco de Assis Fonseca deO objetivo neste estudo foi avaliar a curva de lactação e a qualidade do leite de cabras Saanen recebendo rações com diferentes relações volumoso:concentrado. Foram utilizadas 20 cabras (59,59 kg ± 6,97) em lactação, distribuídas em delineamento inteiramente casualizado. Os tratamentos consistiram de cinco relações volumoso:concentrado nas rações (40:60, 50:50, 60:40, 70:30 e 80:20), correspondentes a 2,95; 2,8...