Curso de Zootecnia
Curso de Zootecnia
de Souza A.L.,Federal University of Viçosa |
Garcia R.,Federal University of Viçosa |
da Silva Cabral L.,Federal University of Viçosa |
Pereira M.L.A.,Curso de Zootecnia |
Valadares R.F.D.,Federal University of Viçosa
Revista Brasileira de Zootecnia | Year: 2010
It was evaluated nitrogen compounds and microbial protein synthesis in heifers fed diets containing coffee hulls (0.0; 8.75; 17.25; and 26.25% of dry matter) replacing ground corn concentrate at the following levels of coffee hulls in the total diet dry matter: 0.0, 3.5, 7.0 or 10.5%. It was used 24 crossbreed heifers (7/8, 15/16 and 31/32 Holstein-Zebu), which were distributed in a random block design made up accordingly to the weight of the animals. Spot samples of urine were colleted aproximatelly four hours after morning feeding and were used to estimate microbial protein synthesis by using urine purine derivatives. It was not observed effect of coffee hull levels in the diet on total nitrogen intake (160 g/day) and nitrogen excretion in the urine (87.4 g/day). The inclusion of coffee hull in the diet linearly increased nitrogen excretion in feces, as well as nitrogen balance. There was linear reduction in urinary excretion of allantoin, in total purine derivative and absorbed purine, which reduced 0.715, 0.873, and 0.954 mmol/day to each coffee hull unity added to the concentrate, respectively. Coffee hull altered microbial protein synthesis, which reduced in 0.687 g/day to each coffee hull unity added to the concentrate. Reduction in microbial protein synthesis can reduce weight gain in heifers fed coffee hulls. © 2010 Sociedade Brasileira de Zootecnia.
Nunes A.S.,Federal University of Bahia |
Oliveira R.L.,Federal University of Bahia |
Ayres M.C.C.,Federal University of Bahia |
Garcez Neto A.F.,Curso de Zootecnia
Revista Brasileira de Zootecnia | Year: 2010
This study was conducted in order to verify the best level of palm kernel cake in the diet for lambs through evaluation of hepatic condition. It was used 32 non-castrated Santa Inês lambs distributed into four diets with palm kernel cake levels of 0.0; 6.5; 13.0 and 19.5% in the dry matter (DM). Every 15 days, blood samples were collected, totalizing five collects for the whole experimental period. It was determined levels of triglycerides, cholesterol, total protein, albumin and globulin, activities of alanine aminotransferase, aspartate-aminotrasferase, and gama-glutamiltransferase enzymes, and serum concentrations of total, direct and indirect bilirrubine. The increase of palm kernel cake percentage in the diet did not affect concentration of triglycerides whose mean value was 40.57 mg/dL. However, cholesterol levels increased as the palm kernel cake was increased in the diets. There was no difference in the total proteins either, but there was an increasing quadratic effect in the levels of albumine and urea and a decreasing linear effect in the levels of globuline. Statistical differences were not observed for activities of alanine aminotransferase, aspartate-aminotrasferase, and gamaglutamiltransferase enzymes, which showed mean values of 6.40; 37.59 and 62.38 UI/L respectively. Similarly, it was not detected influence on the total, direct, and indirect bilirrubine, whose mean values were 0.50; 0.11; and 0.38 mg/dL, respectively. The use of palm kernel cake at levels up to 19.5% does not cause metabolic disorders in lambs. © 2010 Sociedade Brasileira de Zootecnia.
Soares S.B.,Federal University of Vales do Jequitinhonha and Mucuri |
Furusho-Garcia I.F.,Federal University of Lavras |
Pereira I.G.,Federal University of Vales do Jequitinhonha and Mucuri |
Alves D.L.,Curso de Zootecnia |
And 4 more authors.
Revista Brasileira de Zootecnia | Year: 2012
Performance, carcass, non-carcass and commercial cuts and components of Texel × Santa Inês crossbred lambs, managed in confinement and fed diets based on soybean oil, soybeans and a conventional diet, with or without the use of monensin (78 ppm dry matter basis) were evaluated. Thirty-six Texel × Santa Inês lambs (18 males and 18 females) were managed in intensive systems. Animals were slaughtered after 87 days of confinement, and performance, carcass characteristics, weight and percentages of carcass and non-carcass components were evaluated. The animals fed the control diet had heavier carcass and parts than animals fed soybean, while the oil diet did not differ from the controls in most parameters. The animals fed soybean showed lower intake kg dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF) and metabolizable energy (ME) compared with animals fed the control diet, increased ether extract (EE) intake in kg, % body weight (BW) and metabolic weight (MW) and did not differ from the soybean oil diet. Animals receiving monensin had lower DM intake, OM, CP, EE, NDF, gross energy (GE) regardless of the expression, % kg BW, or % PM, than the animals that did not receive the additive. Males produced better and had heavier cuts than the females; the latter deposited subcutaneous fat earlier. Animals that received oil or soybean showed greater body weight and small intestine percentage. Soybean oil intake did not improve performance, carcass weights or parts of Santa Ines × Texel lambs in confinement. Soybeans at 15% dry matter reduced energy intake and lamb performance. The use of monensin at 78 ppm on a dry matter basis is not recommended for lambs in confinement, especially if associated with oil or soybeans that may harm animal performance. © 2012 Sociedade Brasileira de Zootecnia.
da Cruz F.K.,State University of Mato Grosso do Sul |
Garcia E.R.M.,State University of Mato Grosso do Sul |
Ferraz A.L.J.,State University of Mato Grosso do Sul |
de Souza K.M.R.,Federal University of Mato Grosso do Sul |
And 2 more authors.
Ciencia Rural | Year: 2016
This study aimed to evaluate the effect of using lycopene and organic minerals in diets for laying hens on the egg quality and stability of eggs stored for 30 days under different storage environments. An entirely randomized design was adopted in 2x3x3 factorial scheme (mineral sources x lycopene levels x storage periods) with six replicates of eight hens per experimental unit. The experimental diets were: feed containing inorganic minerals (IM) without added lycopene; IM with added lycopene (400mg kg-1); IM with added lycopene (800mg kg-1); organic minerals (OM) without added lycopene; OM with added lycopene (400mg kg-1); OM with added lycopene (800mg kg-1). After 112 days of feeding experimental diets, it was selected 60 eggs treatment-1, which were later labeled, stored in room and refrigerated temperature, and subjected to different storage periods (0, 15 and 30 days). Variables analyzed were: Haugh unit, yolk index, yolk color, albumen and yolk pH, and lipid oxidation (TBARS). Stability of eggs is not altered as a function of mineral sources and levels of lycopene studied. However, increasing storage time affects the quality of the eggs of laying hens at both storage conditions. © 2016, Universidade Federal de Santa Maria. All rights reserved.
Lima E.V.,Federal Rural University of Amazonia |
Tavares J.C.S.,Curso de Zootecnia |
Azevedo V.R.,Curso de Zootecnia |
Leitao-Lima P.S.,Federal Rural University of Amazonia
Ciencia Rural | Year: 2010
Information is contradictory as to the time Brachiaria brizantha seeds can remain mixed with the NPK fertilizer without causing poorly formed stands. Therefore, the objective of this research was to study the effect of contact times of NPK granular fertilizer (04-14-08 rate) with seeds of this forage on physiological quality (germination and vigor). A completely randomized design with four replicates was employed. An analysis of variance was conducted and the means were compared by Tukey test at 5%. Polynomial regression analyses were also performed, and equations were fitted. A significant effect was observed in all variables. The water content and electric conductivity of seeds increased as contact time with the fertilizer increased, while decreases were observed in germination percentage, first count, emergence, and emergence velocity index. A linear behavior was observed for the variables. Consequently, seeds can be mixed with NPK fertilizer as long as seeding is performed immediately afterwards, thus reducing damages to the physiological quality of the forage seeds (germination and vigor). In practice, it is recommended that B. brizantha seeds should be mixed with NPK at quantities that can be seeded within 12 hours from mixing, at most.