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	Provedor de dados PAB (1) Autor Colombo,Alberto (1) Guimarães,Rubens José (1) Magalhães,Pedro Bueno (1) Miranda,Wezer Lismar (1) Oliveira,Polyanna Mara de (1) Palavra-chave Coffea arabica (1) Coffea canephora (1) Deficiência hídrica (1) Economia de água (1) Enxertia (1) Irrigação (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Ano 2011 (1) País Brazil (1) Idioma Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 181 Primeira ... 2 3 4 5 6 7 8 9 10 ... Última Factors affecting the performance of Pantaneiro horses R. Bras. Zootec. Souza,Geraldo da Silva e; Gomes,Eliane Gonçalves; Santos,Sandra Aparecida; Rezende,Adalgiza Souza Carneiro de; Andrade,Débora Roque de Freitas; Nogueira,Márcia Furlan; Trigo,Pablo; Abreu,Urbano Gomes Pinto de. ABSTRACT This study aimed to assess the physical performance of Pantaneiro horses with and without equine infectious anemia (EIA) under functional conditions of cattle management. The horses were subjected to a performance test and split into two groups according to a completely randomized design: animals were chosen from populations testing positive and negative for EIA. Performance was measured as a function of a data envelopment analysis (DEA) model considering four outputs and one unitary input. The output measures were the distance achieved in the performance test, hematocrit as a weighted average over the test duration, respiratory rate as weighted average over the test duration, and the level of lactic acid at the test termination. Weights for the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Covariance analysis; Data envelopment analysis; Equine infectious anaemia; Experimental design; Multivariate analysis. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100502 Genetic divergence among accessions of Arachis repens based on vegetative morphological traits R. Bras. Zootec. Azevedo,José Marlo Araújo de; Silva,Hellen Sandra Freires da; Assis,Giselle Mariano Lessa de; Santos,Laís Fernanda Andrade dos; Wolter,Priscila Ferreira. The objective of this study was to verify the existence of genetic variability among accessions of Arachis repens based on vegetative morphological characters, identifying those which contribute least for distinction of those accessions. Nineteen accessions were evaluated in a completely randomized design with ten replicates, established in 4-m² plots. The traits evaluated were: basal leaflet length, basal leaflet width, apical leaflet length, apical leaflet width, petiole length, internode average length and internode diameter. The data obtained were submitted to univariate statistical analysis and accessions were grouped by the Scott-Knott test, at 1% of probability. The analysis of canonical variables and Tocher method were used to study the genetic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage Peanut; Genetic improvement; Multivariate analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001000001 Morphological traits and type of dairy goats registered in Brazil from 1976 to 2009 R. Bras. Zootec. Ferreira,Talita Andrade; Pereira,Idalmo Garcia; Gouveia,Aurora Maria Guimarães; Pires,Aldrin Vieira; Facó,Olivardo; Meira,Camila Tângari; Garcia,Iraides Ferreira Furusho; Guimarães,Maria Pia Souza Lima Mattos de Paiva. Data from 2439 goats of the Saanen, Alpine, Anglo Nubian and Toggenburg breeds recorded from 1976 to 2009 by the Association of Goats and Sheep Breeders of Minas Gerais were used in principal component analysis. After consistency of data, six morphological variables (thorax perimeter, body length, withers height, height, width and length of the rump) and 12 variables related to breed standard score and fitness (breed characteristic, head, palette and topline, feet and legs, dairy type, body capacity, udder, rear and front ligament, udder texture, teat and final score) were analyzed. Based on the magnitude of the eigenvalue (lower than 0.7), eleven variables considered redundant were discarded, resulting in reduced costs of technician labor to evaluate the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Correlation; Discard of variable; Goat; Multivariate analysis. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001200004 Phenotypic diversity between Brazilian fighting cocks and naturalized roosters R. Bras. Zootec. Ibiapina Neto,Vicente; Barbosa,Firmino José Vieira; Campelo,José Elivalto Guimarães; Sarmento,José Lindenberg Rocha; Santos,Natanael Pereira da Silva; Carvalho,Marcos David Figueiredo de. ABSTRACT The present study was carried out to evaluate the phenotypic diversity between fighting cocks; roosters of the naturalized ecotypes Graúna Dourada, Brejeira, Teresina, and Nordestina; roosters of the Sertaneja genetic (synthetic) group; and family-farmed roosters via descriptive and multivariate analyses. The qualitative traits evaluated by descriptive analysis indicated a prevalence of single comb in the Graúna Dourada, Teresina, Nordestina, and Sertaneja ecotypes, whereas the Brejeira ecotype, fighting cocks, and family-farmed roosters have a pea-type comb, which can be viewed as a sign of introgression of the fighting cock in flocks of the region. Dark plumage prevailed across the groups. The quantitative traits subjected to multivariate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster analysis; Morphometry; Multivariate analysis; Principal component analysis. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100303 Characterization of tropical forage grass development pattern through the morphogenetic and structural characteristics R. Bras. Zootec. Rodrigues,Carlindo Santos; Nascimento Júnior,Domicio do; Silva,Sila Carneiro da; Silveira,Márcia Cristina Teixeira da; Sousa,Braulio Maia de Lana; Detmann,Edenio. An experiment was carried out with the objective to evaluate growth pattern of tropical forage grass under free growth by using morphogenetic and structural characteristics with the expectation of using this study for forage grass evaluation protocol. The experimental area was established with two cultivars of Panicum maximum Jacq. (Mombaca and Aruana), a hybrid cultivar of P. maximum Jacq. and P. Infestum BRA-7102 (Massai), two cultivars of Brachiaria brizantha (A. Rich.) Stapf (Marandu and Xaraes) and Molasses grass (Melinis minutiflora Beauv.) and jaragua grass (Hyparrhenia rufa (Nees) Stapf.). The grasses were planted in 1.0-m² experimental units with 24 plants arranged in a completely randomized block design with three replications. Growth pattern of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecophysiology; Grass evaluation; Morphogenesis; Multivariate analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300009 Nutritional divergence in genotypes of forage peanut R. Bras. Zootec. Ferreira,Alexandre Lima; Maurício,Rogério Martins; Pereira,Luiz Gustavo Ribeiro; Azevêdo,José Augusto Gomes; Oliveira,Leandro Silva; Pereira,José Marques. The objective of this study was to evaluate the nutritional divergence between ten genotypes of forage peanut, based on chemical composition as well as fermentation and in vitro degradation kinetic characteristics. Treatments consisted of ten genotypes of Arachis pintoi, namely eight accessions (31135, 30333, 15121, 31828, 15598, 31534, 13251 and 31496) and two cultivars (cv. Belmonte and cv. Amarillo). The genotypes were harvested in each plot at a height of 3 cm from the ground, in 42-day intervals, during the time of heaviest rainfall. For the multivariate analysis the following variables, the following were used: crude protein, neutral detergent fiber, potential degradation in 48 hours, degradation rate of insoluble potentially degradable fraction and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical composition; Gas production; Multivariate analysis. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400005 Influence of forage production area, concentrate supply, and workforce on productive results in milk production systems R. Bras. Zootec. Koerich,Guilherme; Damasceno,Julio Cesar; Bánkuti,Ferenc Istvan; Parré,José Luiz; Santos,Geraldo Tadeu dos. ABSTRACT This study aimed to investigate the influence of forage production area, concentrate supply, and farm labor on characterization of milk production systems (MPS) and their productive results. Milk volume data provided in 2014 by 110 dairy farms located in the eastern region of Santa Catarina State, Brazil, were obtained from a dairy industry. Forty-four farms with different production levels were selected, in which interviews were carried out aiming to characterize the management practices related to forage production area, concentrate supply, and farm labor. A principal component analysis (PCA) was performed. Then, regressions were made between the principal components (PC) and indicator variables of productive response (annual milk production,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster; Multivariate analysis; Principal component analysis. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100100 Sheep meat commercialization in the retail market in Brazilian cities R. Bras. Zootec. Firetti,Ricardo; Alberti,Ana Lúcia Luz; Zundt,Marilice; Santos,Aline de Oliveira; Rego,Fabiola Cristine de Almeida; Astolphi,José Luis de Lima. ABSTRACT This paper explored the mix market characteristics of sheep meat as a product for sale in different cities in the states of São Paulo and Paraná. For this, 81 products were purchased in 21 outlets sampled in a “non-probabilistic” manner for convenience and then subjected to analysis of yield of meat, bone, and fat. Imported products represented 20% of the total, being marketed in hypermarkets. It was observed that 37% of the total products were obtained in hypermarkets, 31% in supermarkets, 23% in butcher shops, and 8.6% in meat outlets. Almost 9% of the products had not undergone the official slaughter inspection system. The main types of products identified were palettes and legs with bones (33.3 and 24.7%, respectively); however, only 25% were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Lamb; Marketing; Multivariate analysis; Sheep industry. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100700 Genetic divergence between genotypes of forage peanut in relation to agronomic and chemical traits R. Bras. Zootec. Menezes,Ana Paula Morais; Assis,Giselle Mariano Lessa de; Mataveli,Marcela; Silva,Hellen Sandra Freires da; Azevedo,José Marlo Araújo de; Mendonça,Márcia Silva de. The objective of this study was to evaluate the genetic divergence of forage peanut in relation to agronomic and chemical traits in both rainy and dry seasons. This experiment was conducted with genotypes from the Forage Peanut Active Germoplasm Bank located in Embrapa Acre. Eighteen genotypes of forage peanut were used: 12 genotypes of A. pintoi, four genotypes of the A. repens species and two interspecific hybrids of A. pintoi × A. repens. The design was of randomized blocks with five replicates. All traits were submitted to analyses of variance and later, study of genetic divergence was done through multivariate analysis techniques, in which the Tocher's optimization method and the nearest neighbor method were used. Dissimilarity measure used in cluster... Tipo: Info:eu-repo/semantics/article Palavras-chave: Arachis; Genetic improvement; Multivariate analysis; Tocher's optimization. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700008 Multivariate approach in the selection of superior soybean progeny which carry the RR gene Rev. Ciênc. Agron. Dallastra,Anderson; Unêda-Trevisoli,Sandra Helena; Ferraudo,Antonio Sergio; Di Mauro,Antonio Orlando. Efficiency in the use of genetic variability, whether existing or created, increases when properly explored and analysed. Incorporation of biotechnology into breeding programs has been the general practice. The challenge for the researcher is the constant development of new and improved cultivars. The aim of this experiment was to select progenies with superior characteristics, whether or not carriers of the RR gene, derived from bi-parental crosses in the soybean, with the help of multivariate techniques. The experiment was carried out in a family-type experimental design, including controls, during the agricultural year 2010/2011 and 2011/2012 in Jaboticabal in the Brazilian State of São Paulo. From the F3 generation, phenotypically superior plants were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Genetic variability; Multivariate analysis. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300021 Influence of land use/occupation on water quality in the Trussu river valley, Ceará, Brazil Rev. Ciênc. Agron. Neto,José Ribeiro de Araújo; Andrade,Eunice Maia de; Palácio,Helba Araújo de Queiroz; Sales,Maria Monaliza de; Maia,Anthony Rafael Soares. ABSTRACT The growing pressure on water resources has reduced its availability as regards quality. Data was investigated for two different periods, with the aim of evaluating the influence of the use and occupation of space on the temporal dynamics of the quality of surface and groundwater in the perennialised valley of the Trussu River in the State of Ceará, Brazil. The first period was from September 2002 to February 2004 and the second from April 2013 to April 2014. Twenty-two water samples were taken from nine sampling stations, five on the surface and four underground. The same stations were considered, monitoring 12 attributes of water quality for a total of 2,376 analyses. Temporal dynamics were characterised employing a technique of multivariate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Water contamination; Multivariate analysis; Semi-arid region. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100059 Spatial distribution of sunflower cultivars and the relationship between growth features Rev. Ciênc. Agron. Martin,Thomas Newton; Pavinato,Paulo Sérgio; Lorentz,Leandro Homrich; Zielinski,Renice Paula; Refatti,Rosana. This work aimed to evaluate the performance of six genotypes of sunflower under two spatial distributions between plant rows, and verify the cause effect relation between growth features. The experiment was carried at experimental area of Federal Technological University of Paraná (Campus Dois Vizinhos), evaluating six sunflower cultivars and two spatial distributions (40 and 80 cm between rows), remaining the total plant population similar, 55.000 plants by hectare. It was performed a path analysis, identifying the features that have most influence on sunflower grain yield and one hundred grain weight, also multiple regression analysis was used to estimate the equation for grain yield and one hundred grain weight. It was verified that sunflower genotypes... Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L; Multivariate analysis; Plant growth. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000200017 Suitability of peduncles of new cashew tree clones for commercial purposes Rev. Ciênc. Agron. Freitas,Ailane Souza de; Dantas,Beatriz dos Santos; Araújo,Ídila Maria da Silva; Garruti,Deborah dos Santos. RESUMO Devido a sua riqueza em compostos bioativos, sabor exótico, polpa carnuda, pele macia e alto teor de açúcares, o pedúnculo do cajueiro é consumido, tanto na forma in natura quanto destinado à industrialização na forma de sucos e derivados. O objetivo deste trabalho foi avaliar a qualidade físico-química e sensorial de pedúnculos de cinco novos clones de cajueiro e compará-los com dois clones comerciais, de forma a auxiliar a seleção de novos materiais adequados para a comercialização como fruta ou para processamento. Foram avaliados acidez titulável, pH, sólidos solúveis, relação Brix/acidez, ácido ascórbico e polifenois totais. O perfil sensorial foi determinado por análise descritiva quantitativa clássica. Os resultados foram submetidos à Anova,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Anacardium occidentale; Quantitative Descriptive Analysis; Multivariate analysis; Caracterization. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300409 Visual assessment of pasture degradation: validation by ground cover and seasonal variation Rev. Ciênc. Agron. Monteiro,Edevaldo de Castro; Burak,Diego Lang; Cunha,Alexson de Mello; Passos,Renato Ribeiro; Mendonça,Eduardo de Sá. ABSTRACT Visual assessments of pasture degradation levels are widespread because they are rapid, practical and inexpensive. However, they can be subjective, making it difficult to distinguish between degradation levels to establish management practices. This fact, in association with the lack of standardization of the number of levels and the assessment periods, suggests a need for further studies. The objective of this study was to evaluate the relation between the degradation levels of visually evaluated pastures and the soil cover measured in fields in summer and winter. Percentages of Brachiaria grass, bare soil, spontaneous vegetation (broad and narrow leaf) and mulch were evaluated in 35 areas with different levels of visual degradation. Canonical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria spp; Soil cover; Multivariate analysis; Quality assessment. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100174 Heterozygosity level and its relationship with genetic variability mechanisms in beans Rev. Ciênc. Agron. Melo,Rita Carolina de; Trevisani,Nicole; Pereira,Thayse Cristine Vieira; Guidolin,Altamir Frederico; Coimbra,Jefferson Luís Meirelles. ABSTRACT Heterozygosity is an extremely important resource in early breeding programs using autogamous plants because it is usually associated with the presence of genetic variability. Induced mutation and artificial hybridization can increase distinctly the proportion of loci in heterozygosis. This study aimed to compare segregating and mutant populations and relate the mechanisms used to generate variability with their respective heterozygosity levels tested. The treatments mutant populations (M2, M3, M4, M5, M6 and M7), segregating populations (F4, F5 and F6) and lines (BRS Pérola and IPR Uirapuru) were evaluated by multivariate analysis and compared by orthogonal contrasts. The canonical discriminant analysis revealed which response variables... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Multivariate analysis; Orthogonal contrasts; Multiple allelism; Selection intensity. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300480 Alternative for the evaluation of coffee seedlings using Fisher's discriminant analysis Rev. Ciênc. Agron. Campos,Katia Alves; Morais,Augusto Ramalho de; Paixão,Crysttian Arantes. ABSTRACT One of the applications of Fisher's linear discriminant function (FDF) is its use in transforming multivariate data into a new univariate variable. This then makes possible a new option for the variance analysis of multivariate data, in addition to the multivariate analysis of variance (MANOVA). The aim of this work was to select groups of seven characteristics of quality in coffee seedlings using six criteria for selection, to use the FDF to transform such groupings of characteristics into a new variable, and then to compare interpretation of the results obtained from the univariate and multivariate analyses of variance of the characteristics and this new variable, with a view to its use in evaluating coffee seedlings. A randomised block design... Tipo: Info:eu-repo/semantics/article Palavras-chave: Variable selection; Multivariate analysis; Data transformation; Analysis of variance; Coffea arabica. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200299 Principal component and cluster analyses to evaluate production and milk quality traits Rev. Ciênc. Agron. Abreu,Bueno da Silva; Barbosa,Severino Benone Paes; Silva,Elizabete Cristina da; Santoro,Kleber Régis; Batista,Ângela Maria Vieira; Martinez,Rafael Leonardo Vargas. ABSTRACT Using multivariate analyses, this study attempted to identify important traits explaining the relationship between milk production and quality produced by Holstein cows. Monthly milk records from three commercial dairy farms located in the Agreste region of Pernambuco, Brazil, collected in the period from 2007 to 2017, were used. A total of 5,872 observations regarding milk production, milk components and somatic cell score (SCS) were analyzed using principal component analysis (PCA) and cluster analysis. According to the former analysis, the first three principal components explained 79.69% of the total variation. Total solids content contributed 29.66% of the variation in the first principal component, while lactose content contributed 49.43% of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Multivariate analysis; Dairy cattle; Milk composition. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300417 Discrimination of geomorphic surfaces with multivariate analysis of soil attributes in sandstone - basalt lithosequence Rev. Ciênc. Agron. Campos,Milton César Costa; Marques Júnior,José; Souza,Zigomar Menezes de; Siqueira,Diego Silva; Pereira,Gener Tadeu. The geomorphic surface concept allows interrelationship among various branches of soil sciences, such as geology, geomorphology and pedology. This association enhances the understanding of spatial soil distribution through landscape, pointing out the soil attributes behavior, which are mainly related to stratigraphy and relief forms. Therefore, this study aims to apply multivariate statistics to categorize geomorphic surfaces in sandstone - basalt lithosequence, so as to provide a basis for soil assessment in similar areas. The study area is located in Pereira Barreto County, SP, Brazil. An area of 530 hectare was selected, where three geomorphic surfaces (I, II and III) were located and mapped. In this area, 134 soil samples were collected at depths of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil Science; Geomorphology; Multivariate analysis. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000300003 Univariate and multivariate nonlinear models in productive traits of the sunn hemp Rev. Ciênc. Agron. Bem,Cláudia Marques de; Cargnelutti Filho,Alberto; Carini,Fernanda; Pezzini,Rafael Vieira. ABSTRACT Multivariate analysis helps to understand the relationships between dependent variables; this methodology has great potential in several areas of knowledge. The aim of this study was to adjust and compare the univariate and multivariate Gompertz and Logistic nonlinear models to describe the productive traits of sunn hemp (Crotalaria juncea L.). Two uniformity trials were performed, and the following productive traits were analyzed in 376 sunn hemp plants along 94 days of observations (four plants per day): the fresh mass of leaves (FML), the fresh mass of stem (FMS), and the fresh mass of the aerial parts (FMAP). The Gompertz and Logistic univariate models were adjusted for each productive trait. To adjust the multivariate models, the errors... Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotalaria juncea L.; Multivariate analysis; Fresh mass; Growth modeling. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100418 EVALUATION OF HUMAN POSTURES DURING WORK IN COFFEE CROPS IN THE SOUTHERN REGION OF MINAS GERAIS Engenharia na Agricultura Fernandes, Allan Alves; de Lima, Renato Ribeiro; Cirillo, Marcelo Ângelo; Barbosa, Marco Antônio Gomes; Veiga, Elayne Penha. Brazil is the largest coffee producer in the world and Minas Gerais is the state responsible for 51.14% of this production, corresponding to 1.55 million tons of beans. In this context, contribution from family farming is signifcant. The aim of this work was to use a multivariate statistical methodology to provide plausible and interpretable results to diagnose the most influential body postures for each worker in coffee crops. Twelve workers were observed during a period of one hour in different tasks. Greater variability of body posture was shown during herbicide application on sloping ground. Despite body postural variability among workers during the tasks, some body postures, like 131 and 231, stood out. The proposed methodology allowed to identify the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cafeicultura; Estatística; Ergonomia na Agricultura coffee culture; Ergonomics; Multivariate analysis; Postural combinations. Ano: 2017 URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/806 Registros recuperados: 181 Primeira ... 2 3 4 5 6 7 8 9 10 ... Última

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