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Resultados filtrados por Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG)

Ambiência, características uterinas ovarianas, produção e composição do leite de primíparas da raça Holandesa (pc) criadas no bioma Cerrado; Ambience, uterine and ovarian characteristics, production and milk composition of primpiparous Holstein heifers (PC) created in teh Brazilian savannah

Bilego, Ubirajara Oliveira
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciência Animal (EVZ); Escola de Veterinária e Zootecnia - EVZ (RG)
Tipo: Tese de Doutorado Formato: application/pdf
Português
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The objective of this study was to evaluate the effects of environmental characteristics on production and milk composition and reproductive activity of primiparous Holstein (PC) race. The experiments were carried out in the Rio whiting, located in Rio Verde, Goiás state Southwest region of the city has two well-defined periods, the rainy season (PCh) (October to April) and dry (PS) (May to September). In the first experiment aimed to evaluate environmental factors such as temperature, relative humidity (RH) and rainfall to estimate Temperature and Humidity Index (THI) in two seasons. The experimental period included the PW during the months of January to April 2011 and the PS to the months of May to August 2012. Through the climate data we calculated the (UTI) by the formula described in NRC (1971). The results showed differences in the variables, minimum, average temperature RH, precipitation and ITU, with higher values for PW. In the second experiment, we used 72 primiparous cows of Holstein breed (PC), aged 24 to 30 months, divided into two experimental groups, with 36 in the PS group and 36 in the PW group. We evaluated the yield and the content of fat, protein, total solids (EST) and defatted (ESD) and milk urea nitrogen (MUN). The experimental design was completely randomized in two periods of measurements (rainy and dry season). There were no differences between the dry and rainy periods for milk production. The values of proximate composition of milk were all different between periods. Values of fat...