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Registros recuperados: 13
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A proposal for the evaluation of the bioeconomic efficiency of beef cattle production systems R. Bras. Zootec.
Marques,Pedro Rocha; Peripolli,Vanessa; Lampert,Vinícius do Nascimento; Dias,Eduardo Antunes; Pereira,Gabriel Ribas; Oliveira,Tamara Esteves de; Rocha,Marcela Kuczynski da; Barcellos,Júlio Otávio Jardim.
ABSTRACT The objective of this study was to identify types of production system and their main indicators on bioeconomic efficiency, using qualitative and quantitative methods to evaluate beef cattle farms in the western region of the state of Rio Grande do Sul. A survey was carried out with 43 farmers operating in the western region of that state. All farms operated with complete cycle production systems in areas larger or equal to 900 ha. A qualitative questionnaire with binary answers and a quantitative questionnaire with numerical answers were applied. Technology and Management drivers were used for the calculation of the efficiency index of farmers obtained by both questionnaires. Farmers were divided into three clusters: low-efficiency level (LEL),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cattle farmers; Clusters analysis; Efficiency; Evaluation methods.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000100065
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Additives on in vitro ruminal fermentation characteristics of rice straw R. Bras. Zootec.
Peripolli,Vanessa; Barcellos,Júlio Otávio Jardim; Prates,Ênio Rosa; McManus,Concepta; Stella,Laion Antunes; Camargo,Cláudia Medeiros; Costa Jr,João Batista Gonçalves; Bayer,Cimélio.
ABSTRACT The objective of this study was to evaluate the effects of mineral and protein-energy (MPES), exogenous fibrolytic enzyme supplements (ES), combination of MPES + ES, and straw without supplement (WS) on digestibility, fermentation kinetic parameters, cumulative gas production, methane, CO2 production, and volatile fatty acid concentration of rice straw of low and high nutritional value, estimated by in vitro techniques. The experimental design was randomized and factorial 2 × 4: two straws (low and high nutritional value) incubated with four supplements (MPES, ES, MPES + ES, and WS) and their interactions. Four experimental periods were used, totaling four replications per treatment over time. Data were analyzed by PROC MIXED of SAS. The in vitro...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Digestion kinetics; Fatty acid; Gas production; Methane.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300240
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Bioeconomic impact of bull breeding soundness examination in cow-calf systems R. Bras. Zootec.
Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Lampert,Vinícius do Nascimento; Borges,João Batista Souza; Peripolli,Vanessa.
It was evaluated the bioeconomic impact of the breeding soundness evaluation on beef cattle production in southern Brazil. Two similar production systems, with and without the use of breeding soundness evaluation, were compared during 4 years in the municipality of Júlio e Castilhos. The rate of unsound bulls in the first examination was 22.8%. By performing the examination, calf production increased by 31%, 13.8 calves/bull/year and 24 kg of calves/cow/year. The benefit/cost ratio on the investment with the breeding soundness evaluation was R$ 35.84. The breeding soundness evaluation improves bioeconomic aspects of beef cow-calf systems.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cattle; Efficiency; Fertility; Productivity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200028
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Calving sub-season and reproductive efficiency of beef cows R. Bras. Zootec.
Reinher,Cristiane; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Prates,Ênio Rosa; Canozzi,Maria Eugênia Andrighetto.
It was evaluated in this work the effect of calving sub-season on the pregnancy rate of 7,726 multiparous Hereford beef cows grazing on natural pastures in southern Brazil, from 1994 to 2007. Calving sub-season periods were divided in 20-day intervals from August 12th to 31st; from September 1st to 20th; from September 21st to October 10th; from October 11th to 31st; from November 1st to 20th. Calving in each sub-season and pregnancy rate (PR) were analyzed by the Chi-square test. Overall means of each sub-season were 92.7% (from August 12th to 31st), 90.6% (from September 1st to 20th), 82.1% (from September 21st to October 10th), 77.7% (from October 11th to 31st), and 70.6% (from November 1st to 20th). Calving sub-season significantly influenced pregnancy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calving date; Cow-calf; Multiparous; Pregnancy rate.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000012
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Carcass characteristics and fatty acid profile of Santa Inês lamb fed banana leftovers Scientia Agricola
Menezes,Adriana Morato de; Tanure,Candice Bergmann Garcia e Silva; Peripolli,Vanessa; Esteves,Geisa Isilda Ferreira; Kindlein,Liris; Louvandini,Helder; Souza,Jurandir Rodrigues de; McManus,Concepta.
ABSTRACT: The use of new feed resources, particularly local agroindustrial byproducts, such as banana, may be an option for replacing those traditionally used for sheep feed to reduce production costs. Thus, the aim of this study was to evaluate the dietary effects of replacing corn bran with banana leftovers on performance, carcass, non-carcass components, meat traits, and fatty acid profile of Santa Inês lambs. Twenty-four Santa Inês female lambs with an average weight of 23.73 kg were fed diets containing 60 % coast cross hay and 40 % concentrate (30 % corn bran and 10 % soybean meal). Treatments consisted of corn bran replaced by banana leftovers at rates of 0, 25, 50, and 75 % on a dry matter basis. The experiment lasted 120 days. Animals were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Byproducts; Meat quality; Non-carcass components; Sustainability.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000100400
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Carcass characteristics and meat evaluation of Nelore cattle subjected to different antioxidant treatments R. Bras. Zootec.
Carmo,Thiago de Jesus do; Peripolli,Vanessa; Costa Jr,João Batista Gonçalves; Tanure,Candice Bergmann; Fioravanti,Maria Clorinda Soares; Restle,João; Kindlein,Liris; McManus,Concepta.
ABSTRACT Forty Nelore cattle were used to evaluate the effects of supplementation with different antioxidants on carcass characteristics and meat quality of feedlot cattle. Animals were fed Brachiaria brizantha hay and subjected to five treatments (control and four antioxidants: zinc, selenium, vitamin E, and selenium + vitamin E). After a 105-day feeding period, cattle were slaughtered. Tissue composition, as well as carcass proximate composition, color, tenderness, pH, and fatty acid profile were evaluated. Analysis of variance was carried out and means compared by Tukey test at 0.05 probability. The group fed selenium showed the lowest muscle amount (66.61 g/100 g) compared with the other antioxidants evaluated. There was no difference among treatments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fatty acid; Saponin; Selenium; Vitamin E; Zinc.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200138
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Causes of rejection of beef bulls in breeding soundness evaluation R. Bras. Zootec.
Menegassi,Silvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Borges,João Batista Souza; Bernardi,Mari Lourdes.
The objective of this study was to analyze the rates of rejection in the different steps of the breeding soundness evaluation of beef bulls in the state of Rio Grande do Sul, Brazil. The breeding soundness of 22,113 young and mature bulls of 14 beef breeds, participating in the Program of Reproductive Evaluation (PARTO) was evaluated in the experiment. Data concerning to the causes of rejection in the four steps of the breeding soundness evaluation (general physical examination, genital tract examination, semen evaluation and sexual behavior assessment) were analyzed by the Chi-square test and univariate regression analysis. According to year, general physical examination, genital tract examination and semen evaluation determined the rejection of 0.9% to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavior assessment; Libido; Mounting capacity; Reproductive assessment.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700013
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Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems Scientia Agricola
Santos,Viviane Rodrigues Ventolin dos; McManus,Concepta; Peripolli,Vanessa; Tanure,Candice Bergmann; Lima,Paulo de Mello Tavares; Corrêa,Patrícia Spoto; Brito,Daiana Lima; Torres,Sônia Emília Figueiredo de Araújo; Louvandini,Helder.
ABSTRACT The aim of this study was to evaluate the effect of three different grazing systems: isolated, alternate and simultaneous, on feed intake, performance and carcass characteristics of sheep. About 5.2 ha area of Tanzania grass (Panicum maximun Jacq cultivate Tanzania) was divided into 13 paddocks. This area was used as a stocking rate of two animal units (AU) per ha for 7 days’ occupation and 21 days rest. A total number of 58 animals were used consisting of 12 heifers and 30 Santa Ines lambs with the addition of 16 adult ewes that were used to stabilize grazing pressure in the isolated system. The sheep were fed on 200 g per head per day of concentrate and cattle 2 kg per head per day. The parameters determined were the following: weekly weight...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass quality; Carcass weight; Simultaneous grazing systems; Tanzania grazing area.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600436
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Nutritional value of baled rice straw for ruminant feed R. Bras. Zootec.
Peripolli,Vanessa; Barcellos,Julio Otávio Jardim; Prates,Ênio Rosa; McManus,Concepta; Silva,Leila Picolli da; Stella,Laion Antunes; Costa Junior,João Batista Gonçalves; Lopes,Rúbia Branco.
ABSTRACT The objectives of this study were to evaluate the effects of cultivation and hay making factors on chemical composition, protein fractionation, and digestibility in rice straw, as well as to identify the chemical fractions that contribute to the variation in its nutritional value for ruminants. Statistical procedures were performed in a model that included rice crop cycle, sowing season, baling season, soil classification, fertilizer application, and productivity (kg/ha) as fixed effects and the hay bale as random effect. Chemical composition, protein fractionation, and digestibility data were subjected to multivariate analyses including factor, cluster, and discriminant. Considering the cultivation and haymaking factors, development cycle, baling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Forage conservation; Protein fractionation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000700392
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Perfil lipídico da gordura intramuscular de cortes e marcas comerciais de carne bovina R. Bras. Zootec.
Pinho,Angélica Pereira dos Santos; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Kindlein,Liris; Araújo,Juliana Rosa de; Alves Filho,Dari Celestino.
O trabalho foi realizado para caracterizar a gordura intramuscular dos cortes contrafilé, picanha e costela de seis marcas comerciais (A, B, C, D, E e F) de carne bovina comercializadas no município de Porto Alegre, Rio Grande do Sul. As amostras foram coletadas em uma rede de hipermercados. As marcas A e B foram associadas a animais de raças britânicas, as marcas C e D de animais de raças européias produzidos em sistema convencional e orgânico, respectivamente, e provenientes do Uruguai e as marcas E e F de animais sem raça definida e sistema de alimentação não identificado, obtidas em um frigorífico regional e em uma rede de hipermercados, respectivamente. As amostras foram desossadas, moídas, embaladas a vácuo e armazenadas em temperatura de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ácidos graxos saturados; Ácidos graxos insaturados; Contrafilé; Costela; Picanha.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500027
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Prediction of apparent metabolizable energy and metabolizable energy corrected for nitrogen of corn according to physical classification of the grain R. Bras. Zootec.
Rodrigues,Sandra Iara Furtado Costa; Stringhini,José Henrique; Tanure,Candice Bergmann; Peripolli,Vanessa; Seixas,Luiza; McManus,Concepta.
ABSTRACT The objective of this study was to develop an equation to determine the apparent metabolizable energy (AME) and metabolizable energy corrected for nitrogen balance (AMEn) using a physical-based classification of corn. A total of 5,055 samples were taken from bulk cargo trucks, over a five-year period. The parameters studied were the variables related to the physical characteristics of grains. The density of maize was evaluated, and AME and AMEn were calculated. The average value for AME was 3,375 kcal/kg, and two groups were formed of high quality and low quality for all samples. Stepwise regression analysis was then carried out using grain quality to estimate AME and AMEn, and the validation of the equations was carried out with 6,490 independent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broilers; Metabolizability; Nutritional value.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100522
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Reproductive success or failure in four breed groups of beef bulls R. Bras. Zootec.
Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Dias,Eduardo Antunes; Costa Junior,João Batista Gonçalves; Vieira,Maitê de Moraes; Moojen,Fernanda Gomes.
The objective of this study was to determine the main causes of failure in bull breeding using a soundness evaluation in Rio Grande do Sul State/Brazil. We evaluated 19,836 bulls from 15 different breeds with ages ranging from two to eight years. The failures of bulls in each step were analyzed by logistic regression. The binary logistic regression was applied because the response variable had only two responses: Success (1) and Failure (0). Older bulls are more likely to be rejected than are younger bulls, regardless of their genetic group. Depending on the step of the assessment, one or another group is rejected. All steps of bull breeding soundness evaluation (BBSE) are important, with special attention to the failures of the behavioral evaluation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: BBSE; Fertility; Mounting ability; Scrotal circumference.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700240
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Valor nutricional de forragem de pastagens manejadas durante o período hibernal Ciência Rural
Olivo,Clair Jorge; Meinerz,Gilmar Roberto; Nörnberg,José Laerte; Agnolin,Carlos Alberto; Steinwandter,Edilene; Peripolli,Vanessa; Hohenreuther,Franciele; Martinelli,Suziane Ghedini; Martins,Dirlaine Ilha.
O objetivo nesta pesquisa foi avaliar o valor nutritivo, determinando-se a matéria orgânica (MO), digestibilidade in vitro da MO (DIVMO), nutrientes digestíveis totais (NDT), digestibilidade in vitro da matéria seca (DIVMS), proteína bruta (PB) e fibra em detergente neutro (FDN), de quatro sistemas forrageiros (tratamentos), pastejados por vacas da raça Holandesa. Os tratamentos foram constituídos por "coastcross" (Cynodon dactylon L. Pers.) sobresemeada com azevém (Lolium multiflorium Lam. cv. 'Comum'); coastcross sobresemeada com azevém e trevo branco (Trifolium repens L., cv. 'Yi'); azevém mais trevo branco e apenas azevém. Entre 15 de maio e 24 de outubro de 2006, foram conduzidos cinco ciclos de pastejo, sendo avaliada a massa de forragem de...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Azevém; Coastcross; Composição botânica; Trevo branco; Valor nutritivo.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000300029
Registros recuperados: 13
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