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Behavior of buffalo heifers reared in shaded and unshaded pastures during the dry season on Marajó Island, Pará, Brazil Animal Sciences
Almeida, Jean Caio Figueiredo de; Joset, Waléria Cristina Lopes; Noronha, Rafaela de Paula Pachêco; Barbosa, Antônio Vinicius Correa; Lourenço Júnior, José de Brito; Silva, Jamile Andréa Rodrigues da.
The objective of this research was to evaluate the behavior of twenty buffalo heifers reared during the dry season on Marajó Island, Pará, Brazil. The animals were distributed into two groups, those with shade (WS) and those without shade (WOS). The experimental day was divided into six shifts: morning (6:00 to 9:55 a.m.), intermediate (10:00 a.m. to 1:55 p.m.), afternoon (2:00 to 5:55 p.m.), evening (6:00 to 9:55 p.m.), night (10:00 p.m. to 1:55 a.m.), and early morning (2:00 to 5:55 a.m.). The WS group was kept in silvipastoral system paddocks, while the WOS group was kept in unshaded paddocks. Climatic data were registered and temperature and humidity index (THI) were calculated....
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.05.00-4 bioclimatology; Ethology; Heat..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/43088
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Behavior of Saanen dairy goats in an enriched environment Animal Sciences
Gomes, Karina Aurora Rodrigues; Valentim, Jean Kaique; Lemke, Sara Santana Ramos; Dallago, Gabriel Machado; Vargas, Ricardo Cruz; Paiva, Andre Luíz da Costa.
 The objective of the present study was to evaluate the behavior of lactating Saanen dairy goats housed with or without the use of environmental enrichment technique. Twelve animals were split into two equal groups and assign to one of two treatments: stall with or without enrichment. Five objects were used to enrich the stalls: plastic PET bottles suspended and freely on the floor (both filled with corn as a visual and auditory stimuli), general cleaning brushes fixed to the wall of the stall, suspended tire, and a tree trunk for climbing. The behavior of the goats was observed during two hours for 10 consecutive days. The behaviors were recorded using focal-animal sampling method, observing each animal during 10-minute period. Descriptive statistics were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zootecnia caprinocultura bem-estar animal etologia animal welfare; Dairy goat; Environmental enrichment; Ethology; Stereotyping..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42454
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Benzocaine and eugenol as anesthetics for Brycon hilarii - doi: 10.4025/actascianimsci.v35i2.16644 Animal Sciences
Fabiani, Bruno Matucita; Universidade Estadual do Oeste do Paraná - Unioeste; Boscolo, Wilson Rogério; Universidade Estadual do Oeste do Paraná - Unioeste; Feiden, Aldi; Universidade Estadual do Oeste do Paraná - Unioeste; Diemer, Odair; Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP; Bittencourt, Fábio; Universidade Estadual Paulista - UNESP; Neu, Dacley Hertes; Universidade Estadual de Maringá - UEM.
Anesthetic products are frequently employed during fish handling practices; however, the correct doses of the various chemicals for different species are still unknown. This study determined the ideal concentrations of benzocaine and eugenol as anesthetics used in Brycon hilarii juveniles. The fish were acquired from a commercial fish farm located in western Paraná state, Brazil, totaling 104 juveniles, with average body weight and length of 50.04 ± 20.80 g and 16.30 ± 12.32 cm respectively. The study was carried out at the Aquiculture Laboratory from the Aquaculture Management Study Group - GEMAq at the West Parana State University. Five benzocaine concentrations (50.0, 100.0, 150.0, 200.0 and 250.0 mg L-1) and seven eugenol concentrations (50.0, 100.0,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.06.04.00-7 anesthesia; Light sedation; Handling; Native fish; Fish farming; Lethargy Anesthesia; Light sedation; Handling; Native fish; Fish farming; Lethargy.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16644
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Bioestimulação e comportamento reprodutivo de vacas de corte - DOI: 10.4025/actascianimsci.v28i4.602 Animal Sciences
Quadros, Sergio Augusto Ferreira de; UFSC; Lobato, José Fernando Piva; UFRS.
Com o objetivo estudar o efeito da bioestimulação sobre parâmetros reprodutivos, 82 vacas primíparas foram distribuídas em 2 tratamentos: bioestimuladas (BE) ou não (NE), durante 83 dias antes do início da estação reprodutiva, através do uso de rufiões. Antes de iniciar a inseminação artificial, as taxas acumuladas de vacas ciclando foram de 21,05% (BE) e de 6,81% (NE). Maiores concentrações sé ricas de progesterona foram observadas nas vacas bioestimuladas, sendo a resposta dependente do status nutricional (condição corporal). Quando associada ao desmame no início da inseminação artificial, a bioestimulação não apresentou efeito sobre a taxa de prenhez (BE = 97,38%; NE = 100%), data juliana média de inseminação (BE =...
Palavras-chave: 5.05.04.00-2 Reprodução Animal bioestimulação comportamento reprodutivo; Efeito do macho; Vacas de corte.
Ano: 2006 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/602
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Biologia e pesca do timbiro, Pterengraulis atherinoides, do açude Pereira de Miranda (Pentecoste, Estado do Ceará, Brasil) - DOI: 10.4025/actascianimsci.v27i4.1156 Animal Sciences
da Silva, Alessandra Cristina; Universidade Federal do Ceará; Saker Sampaio, Silvana; Universidade Federal do Ceará; Ribeiro Viana, Maria Selma; Universidade Federal do Ceará.
O trabalho aborda a biologia e a pesca do timbiro, Pterengraulis atherinoides, do açude Pereira de Miranda, Pentecoste, Estado do Ceará. Coletas mensais foram realizadas durante o período de agosto de 1994 a julho de 1995. Com os dados morfométricos, uma distribuição de freqüência de comprimento foi feita para ser analisada através do Programa FAO-ICLARM Stock Assessment Tools - FISAT. Assim, os seguintes parâmetros foram estimados: crescimento, mortalidade, taxa de exploração, probabilidade de captura, recrutamento e intensidade do esforço de pesca. Desta forma, conclui-se que a espécie possui vida curta e uma taxa de crescimento alta. Os coeficientes de mortalidade natural e por pesca mostraram-se equilibrados, por se tratar de um estoque não explorado...
Palavras-chave: 5.04.05.00-4 Produção Animal Pterengraulis atherinoides; Biologia pesqueira; Açude; FISAT 5.04.05.00-4 Produção Animal.
Ano: 2005 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1156
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Biologia floral e polinização por abelhas em siratro (Macroptilium atropurpureum Urb.) Animal Sciences
Vieira, Renata Eunice; UEM; Kotaka, Carolina Satie; UEM; Mitsui, Marina Himoti; UEM; Taniguchi, Ana Paula; UEM; Toledo, Vagner de Alencar Arnaut de; UEM; Ruvolo-Takasusuki, Maria Claudia Colla; UEM; Terada (in memorian), Yoko; UEM; Sofia, Silvia Helena; UEL; Costa, Fabiana Martins; UEM.
O objetivo deste trabalho foi realizar estudos sobre polinização em siratro, avaliando o período de antese, abelhas visitantes, viabilidade dos grãos de pólen e produção de sementes, utilizando dois tratamentos, um de plantas cobertas e outro de descobertas. O período de antese foi 2,48 dias e 3,56 dias (P = 0,0023) e a produção foi de 8,62 e 11,15 sementes (P = 0,0001), para os tratamentos descoberto e coberto, respectivamente. O teste de receptividade do estigma indicou que 91,95% das flores abertas estavam receptivas. A viabilidade dos grãos de pólen foi 100%. Das seis famílias de abelhas que ocorrem no Brasil, foram encontradas cinco delas visitando as flores desta planta: Andrenidae (12%), Anthophoridae (4%), Apidae...
Palavras-chave: 5.04.00.00-2 Zootecnia polinização; Abelhas; Siratro; Macroptilium atropurpureum; Leguminosa forrageira 5.04.00.00-2 Zootecnia.
Ano: 2002 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2330
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Biologia floral em quatro espécies de Ipomoea (Tubiflorae: Convolvulaceae) - DOI: 10.4025/actascianimsci.v27i1.1259 Animal Sciences
Terada, Yoko; UEM; Taniguchi, Ana Paula; UEM; Takasusuki, Maria Claudia Colla Ruvolo; UEM; Toledo, Vagner de Alencar Arnaut de; UEM.
O objetivo deste trabalho foi estudar a biologia floral de Ipomoea acuminata, I. batata, I. cairica e I. quamoclit na região de Maringá, Estado do Paraná. Durante o período de floração de Ipomoea foram avaliados: período de antese, receptividade do estigma, viabilidade dos grãos de pólen e altura média do estilete e dos filetes. Tanto I. quamoclit quanto I. batata apresentaram abertura das flores às 6h e fechamento completo às 14h. O teste de receptividade do estigma demonstrou que em I. quamoclit estava receptivo entre 6h e 9h e I. batata entre 6h35min e 13h. O período de maior viabilidade dos grãos de pólen em I. quamoclit coincide com o de receptividade do estigma. Nessa espécie, próximo ao horário de fechamento das flores ocorreu diminuição na...
Palavras-chave: 5.04.05.00-4 Produção Animal biologia floral; Ipomoea; Pólen; Período de antese 5.04.05.00-4 Produção Animal.
Ano: 2005 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1259
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Biomass flows and defoliation patterns of alexandergrass pasture grazed by beef heifers, receiving or not protein salt Animal Sciences
Eloy, Lidiane Raquel; Universidade Federal de Santa Maria; Rocha, Marta Gomes da; Universidade Federal de Santa Maria; Pötter, Luciana; Universidade Federal de Santa Maria; Salvador, Paulo Roberto; Universidade Federal de Santa Maria; Stivanin, Sheila Cristina Bosco; Universidade Federal de Santa Maria; Hampel, Viviane da Silva; Universidade Federal de Santa Maria.
The experiment aimed at evaluating leaf biomass flow, intensity and frequency of defoliation of Alexandergrass (Urochloa plantaginea (Link) Hitch) by beef heifers exclusively on pasture or that grazed and received protein salt. A completely randomized experimental design was used with repeated measures over time, two treatments and two area replications, with three Angus test heifers by paddock. Leaf blade intake flow is 18% superior for heifers exclusively on pasture. Grazing intensity (59.8%) is similar when heifers receive protein salt or not. Heifers receiving protein salt reduce by one day the defoliation frequency of tillers. The supply of protein salt for beef heifers grazing Alexandergrass affects the herbivore-plant relationship, decreasing intake...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation frequency; Defoliation intensity; Morphogenesis; Urochloa plantaginea.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21815
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Black pepper (Piper nigrum) in diets for laying hens on performance, egg quality and blood biochemical parameters Animal Sciences
Melo, Ramon Duque; Cruz, Frank George Guimarães; Feijó, Julmar da Costa; Rufino, João Paulo Ferreira; Melo, Lucas Duque; Damasceno, Jessica Lima.
The objective of this study was to evaluate the increasing levels (0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6%) of black pepper in diets for laying hens on performance, egg quality and blood biochemical parameters. Hissex White hens (n=168) at 30 weeks of age were used. The experimental method was completely randomized with seven treatments with four replicates of six birds each. Estimates of black pepper levels were determined by polynomial regression. The performance showed no significant differences (p > 0.05). The eggshell percentage was significantly influenced (p < 0.05), in which the level of 0.30% inclusion impaired eggshell quality. Triglycerides level increased significantly (p < 0.05), according to increasing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nutrição Animal alternative food; Eggshell; Phytogenic; Piperine; Serum metabolism..
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31498
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Body composition and deposition efficiency of protein and energy in grazing young bulls Animal Sciences
Valente, Eriton Egidio Lisboa; Universidade Estadual do Oeste do Paraná; Paulino, Mário Fonseca; Universidade Federal de Viçosa; Marcondes, Marcos Inácio; Universidade Federal de Viçosa; Dias, Isabela Fernanda Teixeira; Universidade Federal de Viçosa.
The effects of supplementation with different protein: carbohydrate ratios on body composition, carcass characteristics and protein and energy deposition efficiency of young were assessed. Twenty-four Nellorecalves (132.5 ± 5.5 kgand 90-150 days of age) were kept on pasture for a 430 day experimental period. The treatments were: Control = mineral mixture only; HPHC = high-protein and high-carbohydrate supplement; HPLC = high-protein and low-carbohydrate supplement; LPHC = low-protein and high-carbohydrate supplement; LPLC = low-protein and low-carbohydrate supplement. Four animals at begning and 20 animal at end of experiment were slaughtered to evaluate the carcass composition. Control bulls had the lowest (p &lt; 0.05) intake of ME (9.8 Mcal day-1)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.03.00-1 associative effects; Beef cattle; Calf; Grazing; Multiple supplement; Production.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/21345
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Body size and its effects on productive efficiency of cows with predominant Nellore genetic composition Animal Sciences
Farias, Gustavo Duarte; Cerdótes, Liliane; Restle, João; Pascoal, Leonir Luiz; Costa, Pablo Tavares; Ferreira, Otoniel Geter Lauz; Vaz, Ricardo Zambarda.
 This study was developed to evaluate productive efficiency during the lactation period of cows with predominant Nellore genetic composition based on their body size. Cows were divided into the following categories: light (≤ 316 kg), moderate (≥ 317 and ≤ 400 kg), or heavy (≥ 401 kg). Body weight change and total gain from birth to 210 days of age of calves born from heavy cows (0.155±0.03 and 111.6±5.1 kg) were higher than those of calves born from light (0.064±0.03 and 91.0±4.3 kg) and moderate (0.144±0.03 and 97.7±4.0 kg) cows. Calf production index differed (p < 0.05) with the herd of heavy cows (93.5±3.2 kg), producing 57.4 and 19.7% more kilograms of calf than light (59.4±2.7 kg)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weaning; Calf production; Lactation; Production per area..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42532
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Body weight components of Nellore steers finished in tropical pastures Animal Sciences
Almeida, Vitor Visitin Silva de; Oliveira, Aline Cardoso; Oliveira, Hellenn Cardoso; Silva, Robério Rodrigues; Lima Júnior, Dorgival Morais de.
 The aim of this study was to evaluate the effect of increasing levels of supplementation on body weight components of Nellore cattle grazing in Urochloa brizantha. Twenty-four steers with initial body weight (BW) of 371 ± 14 kg and average age of 26 months were used. Four animals were slaughtered at the beginning of the experiment as a reference and the others were distributed in 4 treatments [0.0% (mineral salt), 0.3%, 0.6% and 0.9% supplement BW]. The slaughter of the experimental group was performed when the animals reached 450 kg and the body weight components were weighed. Data were submitted to analysis of variance and regression. The increase in supplementation level reduced (p < 0.05) pasture dry matter intake, but did not influence (p >...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Urochloa brizantha; Empty body weight; Non-carcass components; Slaughter by-products..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/39005
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Brazil nut oil in diets for breeder cocks Animal Sciences
Rufino, João Paulo Ferreira; Cruz, Frank George Guimarães; Melo, Ramon Duque; Feijó, Julmar da Costa; Melo, Lucas Duque; Costa, Ana Paula Guimarães Cruz; Bezerra, Natalia dos Santos.
 This study aimed to evaluate the inclusion of Brazil nut oil in diets for breeder cocks on performance, semen analyses, biochemical serum profile and testicular morphology. Forty-two Rhode Island Red breeder cocks with 40 weeks of age were used. The experimental design was completely randomized consisting of seven levels of Brazil nut oil (0; 0.30; 0.60; 0.90; 1.20; 1.50 and 1.80%) in the diets. Data collected were evaluated by polynomial regression. Differences (p < 0.05) were detected in feed conversion, semen volume, motility, vigor, pH, swirling and concentration, in which the inclusion of Brazil nut oil in the diets improved the reproductive performance. Differences (p < 0.05) were also detected in the biochemical serum profile (triglycerides,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additive; Fatty acids; Metabolism; Reproductive performance..
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/37472
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Breed and selection line differences in the temperament of beef cattle - doi: 10.4025/actascianimsci.v35i2.16426 Animal Sciences
Piovezan, Ubiratan; Empresa Brasileira de Pesquisa Agropecuária; Cyrillo, Joslaine Noely dos Santos Gonçalves; Instituto de Zootecnia do Estado de são Paulo; Costa, Mateus José Rodrigues Paranhos da; Universidade Estadual de São Paulo.
The temperament of four beef cattle breeds were measured using a flight time test (FT) and a behavior score test (BST). FT was defined as the time taken by animals to cross a distance of 2 m after weight scale. The BST used a visual assessment of cattle behavior in which the results of four categories defined the score: movements, breathing intensity, vocalization and kicking. FT and BST coefficients of heritability were estimated using the restricted maximum likelihood, considering half siblings. Caracu presented a lower BST value than the other breeds. Nellore presented intermediate results, followed by Guzerat and Gyr with similar and higher means (p &lt; 0.05). Similar results were observed with FT, but Caracu and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.00.00-2 beef cows; Behavior; Fear; Husbandry.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16426
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Breeding goals and economic values for Nellore cattle in a full-cycle production system Animal Sciences
Moreira, Heverton Luis; Savegnago, Rodrigo Pelicioni; Freitas, Luara Afonso; Lôbo, Raysildo Barbosa; Bezerra, Luiz Antônio Framartino; Paz, Claudia Cristina Paro de.
The objective of this study was to develop a bio-economic model for the estimation of economic values of economically important traits in a full-cycle beef cattle production system. The bio-economic model calculated economic values by simulating the impact of changes in the profit of the system consisting of a 1% increase in each trait of the breeding objective, while the other traits were kept constant. The bio-economic model was effective in estimating the sources of revenues and expenses of the production system. The estimated economic values were, in the order of importance for the full-cycle system, R$ 3.69 for male slaughter weight, R$ 3.63 for male weaning weight, R$ 3.58 for weaning rate, R$ 3.40 for female slaughter weight, R$
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.02.00-5 bio-economic model; Economic weights; Genetic selection; Productive traits..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/43361
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Broilers thermal comfort and performance utilizing two different wood-burning heating systems Animal Sciences
Vigoderis, Ricardo Brauer; Silva, João Manoel da; Guiseline, Cristiane; Pandorfi, Heliton; Vieira, Deyvid Vilela.
The objective of this study was to evaluate the thermal comfort and performance of broilers in their initial stage of development utilizing two different heating systems. The experiment was conducted in two sheds placed on a commercial farm. The heating systems were: indirect heating furnace and radiation heating drums. At the beginning of the heating phase the birds were confined in an area corresponding to 360 m² in shed 1 and 180 m² in shed 2, delimited by polyurethane curtains, allowing a density of 58.8 birds m-². The variables: dry bulb temperature (Tdb), relative humidity (RH%) and temperature and humidity index (THI) were calculated. Measurements were performed using continuous reading data loggers at 15-minute...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zootecnia; Produção Animal; Avicultura chicks; Heating; Poultry; Animal comfort..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/39194
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Bromatological characteristics and in vitro digestibility of four sugarcane varieties subjected or not to the application of quicklime - doi: 10.4025/actascianimsci.v34i4.13775 Animal Sciences
Oliveira, Mauro Dal Secco; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Rêgo, Aníbal Coutinho do; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Sforcini, Mariana Paula Rossi; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Freitas Junior, José Esler; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Santos, Juliana dos; Instituto Federal do Rio Grande do Sul; Carvalho, Marina Vieira de.
The experiment was conducted to evaluate the bromatological characteristics and the in vitro digestibility of four sugarcane varieties, subjected or not to hydrolysis, with quicklime. A completely randomized design was employed with three replications arranged in a 4 × 2 factorial scheme, with four sugarcane varieties (SP 52454, RB 867515, RB 855536 and IAC 862480), hydrolyzed or not. There was significant effect on brix (p &lt; 0.05) and industrial fiber (p &lt; 0.05), and IAC 862480 variety had the lowest levels of industrial fiber. There were no significant difference (p &gt; 0.05) in neutral detergent fiber, acid detergent fiber and lignin levels among the sugarcane varieties under analysis and for the...
Tipo: Análise laboratorial Palavras-chave: 5.04.03.02-8 calcium oxide; Cell wall; Fiber; Ruminants; Saccharum officinarum L..
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13775
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Bromatological characterization of maize genotypes for silage - doi: 10.4025/actascianimsci.v34i4.15271 Animal Sciences
Martin, Thomas Newton; Universidade Federal de Santa Maria; Vieira, Valmir da Cunha; Universidade Tecnológica Federal do Paraná; Menezes, Luis Fernando Glassenap de; Universidade Tecnológica Federal do Paraná; Ortiz, Sidney; Universidade Tecnológica Federal do Paraná; Bertoncelli, Patricia; Universidade Federal de Santa Maria; Storck, Lindolfo; Universidade Federal de Santa Maria.
Since every year public and private companies bring many genotypes of maize to the market, the suitability of these genotypes for the production of silage should be evaluated. Current study evaluates the agronomic and chemical characteristics of early-normal cycle maize genotypes as well as assesses whether the genetic bases (single, double, and triple hybrids, as well as varieties and intervarietal genotypes) and the grain hardness (hard, semi-hard and dentate) modify the indication of maize genotypes for silage. The experiment was conducted at the Universidade Tecnológica Federal do Paraná, campus Dois Vizinhos, Paraná State, Brazil. Thirty-six genotypes were evaluated by a simple lattice design. Grains were harvested at the pasty to farinaceous stage...
Tipo: Pesquisa de campo e análise laboratorial Palavras-chave: 5.04.03.03-6 genetic bases; Grain hardness; Cultivars indication; Zea mays L. genetic bases; Grain hardness; Cultivars indication; Zea mays L..
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15271
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Calcium in pre-laying and laying rations on the performance and quality of laying hens’ eggshell - doi: 10.4025/actascianimsci.v35i2.16555 Animal Sciences
Rodrigues, Eliana Aparecida; Instituto Federal do Triangulo Mineiro; Oliveira, Maria Cristina de; Universidade de Rio Verde; Cancherini, Luciana Cardoso; Universidade do Estado de Mato Grosso; Duarte, Karina Ferreira; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Santana, Luis Fernando; Instituto Federal do Triangulo Mineiro; Junqueira, Otto Mack; Universidade Estadual Paulista “Júlio de Mesquita Filho.
The experiment evaluated the effect of different calcium (Ca) levels in pre-laying and laying diets on the performance and egg quality of laying hens. Two hundred and fifty-six 16-week-old Brown Hisex pullets were housed in a conventional shed. The experiment had a completely randomized design with 4 x 2 factorial arrangement (four calcium levels - 0.8, 1.3, 1.8 and 2.3% in pre-laying phase; two calcium levels - 2.5 and 3.5% in laying phase), totaling eight treatments with four repetitions of eight birds per experimental unit. The experiment started with 16-week-old hens receiving pre-laying diets provided until they were 18 weeks old. At this period, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.00.00-2 e 5.04.03.00-1 egg mass; Egg production; Eggshell quality; Feed intake; Pullets egg mass; Egg production; Eggshell quality; Feed intake; Pullets.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16555
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Calcium particle size and feeding time influence egg shell quality in laying hens Animal Sciences
Saki, Aliasghar; Rahmani, Abbas; Yousefi, Azam.
 An experiment with Leghorn laying hens was undertaken to determine the effect of oyster shell particle size and feeding time on different production variables, calcium retention, plasma calcium content and egg internal and external quality. Two hundred Leghorn layers (40 weeks old old) were allocated in five dietary treatments with four replicates during ten weeks. Two particle size combinations (wherein 50% of calcium substituted by medium or coarse particles (1-2 mmand 2-4 mmrespectively) and two feeding time (8-pm or 9-am) were compared against a control diet (100% ground, <1 mmwhich fed with meal). Egg number, egg production, egg mass and feed conversion ratio did not differ among...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calcium retention; Feeding time; Oyster shell; Particle size..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42926
Registros recuperados: 1.261
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