Zootecnista

Brazil

Zootecnista

Brazil

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Backes A.A.,Federal University of Sergipe | Paulino M.F.,Federal University of Viçosa | Alves D.D.,Zootecnista | Valadares Filho S.C.,Federal University of Viçosa
Ciencia Rural | Year: 2010

Twelve steers have been used, when they had average live weight of 276kg, being four indubrasil and eight dairy crossbreeds (four crossbreeds HolsteinxGir and four HolsteinxGuzera). They have been weighted and distributed into two treatments (indubrasil and dairy crossbreeds), in phase fattening. The animals were studied up to 480kg of live weight. Grass hay Tifton 85 (Cynodon dactylon) have been used as feedstuff. After slaughtering samples of rumen, reticulum, omasum, abomasum and intestines have been collected after emptying and cleaning. Weight and samples values of blood, leather, feet, head, liver, kidneys, lung, tongue, spleen and internal fat (mesenterium plus perirenal and pericardia fats) have been collected. Empty body weight (EBW) have been obtained by summing weights of carcass, blood, leather, feet, tail, intestines and organs. The group head-foot-leather of indubrasil steers have been heaver than in dairy crossbreeds. The animals indubrasil and dairy crossbreeds, in fattening phase, have not presented significant differences for total weight of intestines and organs. The animals dairy crossbreeds present, in fattening phase, higher fat proportions intern than indubrasil animals.


Tres T.T.,State University of Maringá | Jobim C.C.,State University of Maringá | Rossi R.M.,State University of Maringá | da Silva M.S.,State University of Maringá | Poppi E.C.,Zootecnista
Revista Brasileira de Saude e Producao Animal | Year: 2014

This study aimed to evaluate the effect of using microbial additive and urea on in vitro digestibility, in ruminal disappearance, and aerobic stability of moisture corn silage with the addition of raw soybeans. The experiment was conducted in a completely randomized design with three treatments (moisture corn grain silage + 20% of raw soybeans, moisture corn silage + 20% of raw soybean + microbial inoculant and moisture corn silage + 20% of raw soybean + 1.4% of urea) and four replications. Silages showed good aerobic stability, within the period of 96 hours, with few losses of dry matter and no consistent variations in the chemical composition. The Urea addition decreased the rate of ruminal degradation of the moisture corn silage with the addition of soybean. A second trial was conducted to evaluate the replacement of commercial concentrate by moisture corn silage with the addition of 20% of crude soybean, 20 dairy cows were used and arranged in a completely randomized design with two treatments and ten replicates. It was found that the moisture corn silage with added soybeans can be used in diets for lactating cows, in replacement of the commercial concentrate, with no impact on the production and chemical composition of the milk, maintaining production levels.


Oliveira R.P.M.D.,Federal University of Amazonas | Assante R.T.,Federal University of Amazonas | Silva A.F.,Zootecnista | Oliveira F.F.D.,Medico veterinario | And 2 more authors.
Revista Brasileira de Saude e Producao Animal | Year: 2016

This study aimed to evaluate the nutritional metabolic condition of Santa Ines ewes in antepartum and postpartum period, in order to avoid toxemia. Were used 50 Santa Ines ewes management under the same condition of handling and feeding, distributed into five groups, according to the gestation period: G1-P-60 (60 days before partum), G2-P-30 (30 to 21 days before partum), G3-P0 (at partum to 4 days post partum), G4-P+30 (30 days after partum) and G5-P+60 (60 days after partum). The blood collection was conducted in the morning by venipuncture of the jugular in two vacuum tubes. The metabolites evaluated were: protein metabolism (total protein, albumin, globulin and urea), energy (glucose) and mineral (magnesium (Mg), calcium (Ca) and phosphorus (P)). To determine the differences between the means was applied the Tukey test at 5% probability. The serum concentrations of the protein metabolism (total protein, albumin and globulins), the mineral metabolism (calcium, phosphorus and magnesium) and the energy metabolism (glucose) according to the experimental phase showed significant differences (P<0.05), where the average Β-hydroxybutyrate remained within the reference values for the breed. None of gestation stages presented metabolic deficiencies in protein and energy inputs for the diet and tested management phase. The mineral calcium showed low levels at the end of gestation and early lactation.


de Souza D.R.,State University of Southwest Bahia | da Silva F.F.,State University of Southwest Bahia | Rocha Neto A.L.,Instituto Federal Baiano | da Silva V.L.,State University of Southwest Bahia | And 4 more authors.
Revista Brasileira de Saude e Producao Animal | Year: 2012

This study aimed to evaluate the use of mineral and mineral supplement protein in finishing Nellore grazing Brachiaria brizantha during the rainy season and its implications for forage intake, animal performance and nutrient digestibility. The fieldwork was located in an area of 26 ha, divided into four paddocks of approximately 6.5 hectares (ha), formed Brachiaria brizantha Marandu. We used 18 Nellore with 28 months live weight of 400.5 ± 7.5kg and castrated in two treatments: mineral supplementation until the termination and mineral supplementation of low protein intake to termination. There was no effect on the consumption of pasture, neutral detergent fiber, crude protein, fat, non-fiber carbohydrates, ash and total digestible nutrients. The animal performance and feed conversion were not affected by supplementation. There was no effect on the coefficient of digestibility of dry matter, organic matter, crude protein, ether extract and neutral detergent fiber. There was an effect of supplementation on the digestibility of non-fiber carbohydrates. In the rainy season the utilization of mineral salt allows the of animals in pastures. It is unnecessary supplementation with protein salt at the time of the waters.


Da Cruz R.S.,Federal University of Tocantins | Alexandrino E.,Zootecnista | Missio R.L.,Zootecnista | Restle J.,Engenheiro Agronomo | And 4 more authors.
Bioscience Journal | Year: 2015

The objective was to evaluate the carcass characteristics of feedlot bulls fed levels of concentrate (65 and 71%) with or without the inclusion of 35% of babassu mesocarp bran (BMB) in concentrate fraction of the diet. Twenty eight young bulls were used, with initial age of 21 month and 356.7±19.2 kg of initial body weight. The experimental design was completely randomized design with treatments in a factorial arrangement 2x2. Hot and cold carcass weights were not affected by dietary concentrate level and the inclusion of BMB in the concentrate, with average values of 256.39 and 245.87 kg, respectively. Hot and cold carcass yield were lower for diets that associated the lower level of concentrate and 35% of BMB in the concentrate fraction of the diet. Subcutaneous fat thickness, conformation and carcass physiological maturity were not affected by concentrate level and the inclusion of the BMB, averaging 3.6 mm, 10.89 and 12.93 points respectively. The inclusion of 35% of BMB in the concentrate associated with different levels of concentrates did not alter commercial cuts weight. The inclusion of 35% of the BMB in the concentrate fraction of diets with high concentrate for feedlot bulls does not change the carcass characteristics of economic interest, providing production of carcasses with adequate quality. © 2015, Biosci. J. All rights reserved.


de Oliveira L.B.T.,Federal University of Tocantins | dos Santos A.C.,Federal University of Tocantins | Lima J.S.,Zootecnista | Neves Neto D.N.,Federal University of Tocantins
Revista Brasileira de Saude e Producao Animal | Year: 2015

This work aimed to evaluate the spatial variability of structural and productive responses of Marandu grass depending on the chemical characteristics of the soil and topography. The experiment was conducted in a topossequence, school of Veterinary Medicine and Animal Science, The V variables were evaluated CTC, SB, m, pH at a depth of 0-20 cm, effective depth, number of tillers (m2), production dry matter (kg ha-1), when sward (cm). 72 samples were collected in georeferenced points on sloping ground. The soil was classified as Entisol in the upper portion (top), Udorthent Eutrophic the upper third of the slope (shoulder), Udorthent eutrophic in the middle third of the slope (halfslope) and Quartzips amment Hydromorphic in the lower third (pedimento). All variables presented spatial dependence with variograms of well-defined structure. The pasture presented heterogeneity in the morphology of the canopy due to the spatial distribution of soil fertility, resulting in canopy and producing higher dry matter at the top and reaching the lower production on the shoulder of topossequence. The sward has heterogeneity in morphology depending on the spatial distribution of soil fertility and the effective depth, resulting in the creation of two management areas: 1 → topo and pediment, and 2 → shoulder and half hillside.


Fiorelli J.,University of Sao Paulo | Da Fonseca R.,São Paulo State University | Morceli J.A.B.,Zootecnista | Dias A.A.,University of Sao Paulo
Engenharia Agricola | Year: 2010

This paper presents a different roof tiles influence study on the thermal comfort for broiler housings. The research was conducted at UNESP's Experimental Campus at Dracena, state of São Paulo, Brazil. Four prototypes in real scale were built, each with an area of 28 m 2. The prototype was covered with roof tiles made of recycled long-life packing material, ceramic tiles, ceramic tiles painted with white coating, and fiber/cement tiles. Temperatures inside the structures were recorded in the winter 2007 over a 90-day period. The results obtained indicated that recycled tile thermal behavior was similar to ceramic tiles. However for the winter period all the prototypes had presented comfort thermal index not in the broilers thermo neutral zone.


Furtado D.A.,Federal University of Campina Grande | Rocha H.P.,Zootecnista | Nascimento J.W.B.,Federal University of Campina Grande | Silva J.H.V.,Federal University of Paraiba
Engenharia Agricola | Year: 2010

The aim of this research is to determine the thermal comfort index, the concentration of gases inside the poultry houses and their influence on the performance of commercial broiler chickens, located in the Paraibás semiarid region, in summer conditions. It was used two poultry houses, one of them covered with a ceramic roof and the other covered with fibrous cement roof. There was no significant difference (p> 0.05) between ambient temperature (AT), relative humidity (RH) and temperature of the drinking water (Twater) and the chicken litter between the warehouses, but the values average of AT (from 08:00 a.m. to 5:00 p.m.) and RH (from10:00 a.m. to 4:00 p.m.) can be considered outside the boundary of the comfort zone recommended for chicken broilers, but also the Twater was above the recommended limits, during the day, which is 24° C. None of the chicken broilers showed concentrations of gases that offer an unhealthy ambient to the birds and to the workers. Although the Twater and the index of thermal comfort are elevate during the hottest days, the production indices were within the established for the Brazilian poultry industry.


Junior J.G.B.G.,Zootecnista | Da Silva J.B.A.,UFERSA | Morais J.H.G.,Zootecnista | De Lima R.N.,Zootecnista
Acta Veterinaria Brasilica | Year: 2014

The success of livestock farming in Semiarid northeastern has a strong relationship with the regularity and distribution of rainfall. Thus, the cultivation of crops with lower water requirements become the key to maintenance of production systems, especially in ruminants. With this, the cactus pear, varieties Opuntia of genres and Nopalea, for decades, the food is more expression in power in most of the northeastern States during dry periods. Lately, pest attack more offensive to the culture, cochineal, is decimating large areas palmais. Therefore, studies and researches have been developed to select and develop varieties resistant palm to his attack. The practices of cultivation of culture vary with the level of technology adopted, since spacing, types of fertilization and forms to animal feeding. The cactus pear is a food that can be used as a source of energy in the diet of ruminants, however, have low levels of protein and fiber, necessitating their supply with other ingredients to form the animal diet. The objective of this review is to discuss the main aspects related to the production and utilization of forage cactus for ruminants, notably facing Semiarid region of Northeast brazilian.


Leao A.G.,São Paulo State University | Silva Sobrinho A.G.,São Paulo State University | Moreno G.M.B.,São Paulo State University | de Souza H.B.A.,São Paulo State University | And 3 more authors.
Revista Brasileira de Zootecnia | Year: 2012

With the objective of evaluating physic-chemical and sensorial characteristics of meat from lambs finished in feedlot with diets containing sugar cane or corn silage at two roughage:concentrate ratios, 60:40 or 40:60, 32 non-castrated Ile de France lambs, with 15 kg body weight were used. Animals were confined in individual stalls and were slaughtered at 32 kg body weight. Studied diets and muscles did not affect pH at 45 minutes (6.56) and 24 hours (5.62) after slaughter, water holding capacity (58.38%) or cooking losses (34.04%). Meat color and subcutaneous fat color did not differ between diets, but meat color varied for the muscles longissimus lumborum and triceps brachii. Shear force (1.85 kgf/cm2) was not affected by diets, but it was different between muscles, with values 1.41 and 2.28 kgf/cm2 for the longissimus lumborum and triceps brachii, respectively. At sensorial analysis of ovine loin and shoulder, the lambs fed sugar cane and higher quantity of concentrate had higher scores for flavor (8.07 and 8.26), texture (8.53 and 8.53), preference (8.20 and 8.46) and acceptance (8.33 and 8.26), respectively. In the diet for feedlot lambs, sugar cane maintained the physic-chemical quality of the meat, so it can be used in this production phase. When associated to higher quantity of concentrate in the diet, sugar cane improves the sensorial quality of lamb meat. © 2012 Sociedade Brasileira de Zootecnia.

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