Brazil
Brazil

Time filter

Source Type

Sarmento J.L.R.,Federal University of Piauí | Torres R.A.,Federal University of Viçosa | de Sousa W.H.,EMEPA | de Albuquerque L.G.,São Paulo State University | And 2 more authors.
Revista Brasileira de Zootecnia | Year: 2011

Polynomial functions of age of different orders were evaluated in the modeling of the average growth trajectory in Santa Ines sheep in random regression models. Initially, the analyses were performed not considering the animal effect. Subsequently, the random regression analyses were performed including the random effects of the animal and its mother (genetic and permanent environment). The linear fit was lower, and the other orders were similar until near 100 days of age. The cubic function provided the closest fit of the observed averages, mainly at the end of the curve. Orders superior to this one tended to present incoherent behavior with the observed weights. The estimated direct heritabilities, considering the linear fit, were higher to those estimated by considering other functions. The changes in animal ranking based on predicted breeding values using linear fit and superior orders were small; however, the difference in magnitude of the predicted breeding values was higher, reaching values 77% higher than those obtained with the cubic function. The cubic polynomial function is efficient in describing the average growth curve. © 2011 Sociedade Brasileira de Zootecnia.


Borburema J.B.,Federal University of Campina Grande | Cezar M.F.,Federal University of Campina Grande | Marques D.D.,Federal University of Campina Grande | Cunha M.G.G.,EMEPA | And 4 more authors.
Arquivo Brasileiro de Medicina Veterinaria e Zootecnia | Year: 2012

The objective of this study was to evaluate the metabolic profile of 40 Santa Inês sheep, whole, with average weight of 17±1,7kg, submitted to food restriction followed by refeeding in confinement, distributed in four treatments: 0, 20, 40 and 60% restriction food. Two tests were developed, one for restriction and one for refeeding. In this experiment a completely randomized design was used, with four treatments and 10 repetitions, distributed in a factorial 4x3 crossover. In the constraint phase it was observed that phosphorus levels were higher in animals under food restriction, this also occurred in the final stage for of total protein (TP), albumin (Alb) and total cholesterol concentrations. The gamma-glutamyl transferase (GGT) decreased linearly with increasing restriction. On the second trial it was found that concentrations of PT, Alb, globulin, total cholesterol, high density lipoprotein, GGT and Mg were similar (P<0,05) between collection periods. In the previous restriction, a decreasing linear behavior and interaction treatment for GGT versus collection period for the concentration of calcium was observed. The levels of food restriction affect protein metabolism and did not interfere with energy metabolism, and feedback resulted in changes in protein, energy and mineral metabolism.


Cartaxo F.Q.,EMEPA | de Sousa W.H.,EMEPA | Costa R.G.,Federal University of Paraiba | Cezar M.F.,Federal University of Campina Grande | And 2 more authors.
Revista Brasileira de Zootecnia | Year: 2011

The objective of this study was to evaluate the quantitative carcass traits of lambs from different genotypes receiving different levels of energy in the diet. Fifty-four non-castrated lambs - 18 Santa Inês (SI), 18 F1Dorper × Santa Inês (Dp × SI) and 18 F1Santa Inês × No defined breed (SI × NDB) - of average 150 days old and 22.6-kg BW were used in the beginning of the experiment. Diets contained 17% crude protein and 2.40 Mcal/kg DM or 2.90 Mcal/kg DM. Lambs fed the diet containing 2.90 Mcal/kg DM showed higher final live and carcass weight, loin eye area, percentage of internal fat, muscularity index, compactness of the carcass index, percentage of fat and lower muscle:fat relation. These lambs' carcasses also presented lower percentage of cold loss and higher weight and percentage of shoulder and leg. Carcasses of Dp × SI lambs were superior in fat thickness, GR site, percentage of fat, muscle:bone relation, muscularity index, weight and percentage of loin. Santa Inês sheep showed higher muscle:fat relation. Both diet and genotype influence quantitative carcass traits of lambs.


Oliveira A.P.,Federal University of Paraiba | Oliveira A.P.,Brazilian National Council for Scientific and Technological Development | Santos J.F.,EMEPA | Cavalcante L.F.,Federal University of Paraiba | And 9 more authors.
Horticultura Brasileira | Year: 2010

In Northeastern Brazil, the sweet potato is cultivated in small farms, in a family farming systems, constituting themselves an alternative way for the generation of food, employment and income. This study aimed to assess the effect of cattle manure levels and biofertilizer concentrations on the sweet potato cultivar White Queen productivity. The experiment was carried out from March to September 2007 at the EMEPA Experimental Station in Lagoa Seca, Brazil. The experimental design was randomized blocks, in split split plot 6 x 4 x 2 + 1 scheme, with four replications. The plots consisted of cattle manure levels (0, 10, 20, 30, 40 and 50 t ha -1), the subplot of biofertilizer concentrations (0, 15, 30 and 45%) and the sub subplots consisted of methods of biofertilizer application, to the soil or leaves. Also, there was an additional control treatment using N, P and K mineral fertilizer. Commercial and total root productivity was evaluated. The levels of 30.8 and 31.2 t ha -1 of cattle manure were responsible for the highest commercial and total sweet potato root productivity (17.4 and 13.1 t ha -1, respectively). Biofertilizer concentrations of 29 and 28%, applied to soil and to leaves provided, respectively, the greatest productivities of total roots (15.4 and 13.1 t ha -1), whereas concentrations of 30 and 27%, also applied to soil and leaves were responsible, respectively, for the highest commercial root productivity (11 and 9.7 t ha -1).

Loading EMEPA collaborators
Loading EMEPA collaborators