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Search Results: 1 - 10 of 601630 matches for " Chagas Silvio Júlio de R. "
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Características produtivas e qualitativas de cultivares de alho
Resende, Geraldo M. de;Chagas, Silvio Júlio de R.;Pereira, Lair Victor;
Horticultura Brasileira , 2003, DOI: 10.1590/S0102-05362003000400023
Abstract: field trials were conducted at epamig, lavras, brazil, from may to october/95, to indicate productive garlic cultivars with industrialization characteristics. the experimental design was of randomized complete blocks with four repetitions and seven treatments: dourado de castro, chines?o, gigante de curitibanos, gigante de lavínia, amarante, cará and gigante roxo. the commercial bulb yield varied from 7.37 to 14.72 t/ha, the most productive ones being the gigante curitibanos (14.72 t/ha) and dourado de castro (14.29 t/ha), with no significant difference, followed by cultivars presenting yield over 7.00 t/ha. a variation occurred from 18.00 (amarante) to 59.25 g/bulb (gigante roxo) and from 8.20 (chines?o) to 33.78 cloves/bulb (dourado de castro). cultivars presented no significant differences for total and soluble solids, with values over 36.95 and 36.00%, respectively, besides presenting good characteristics for industrialization.
Características produtivas de cultivares de cebola no Sul de Minas Gerais
Resende, Geraldo M. de;Chagas, Silvio Júlio de R.;Pereira, Lair Victor;
Horticultura Brasileira , 2003, DOI: 10.1590/S0102-05362003000400031
Abstract: to identify onion cultivars of higher yield for the southern region of minas gerais state, brazil, a field trial from epamig was conducted in lavras, brazil, from march to september 1994.the experimental design was randomized complete blocks with four replications and seven treatments: granex 33, texas grano 502, crioula, pira ouro, baia periforme, jubileu and chata roxa. the harvesting area of each plot was 3.84 m2. the yield of commercial bulbs varied from 22.58 to 50.21 t/ha, and the highest yield was achieved by the cultivars granex (50.21 t/ha) and texas grano 502 (44.36 t/ha) with no significant difference between them. these cultivars exceeded the national average yield (16.5 t/ha) from 204.3 to 168.8%. the lowest yield was shown by the cultivar chata roxa (22.58 t/ha). a variation occurred from 45.99 to 97.69 g/bulb and 5.35 to 7.39 cm for the bulb diameter.
Características produtivas de cultivares de cebola no Sul de Minas Gerais
Resende Geraldo M. de,Chagas Silvio Júlio de R.,Pereira Lair Victor
Horticultura Brasileira , 2003,
Abstract: Identificou-se cultivares de cebola mais produtivas através de um ensaio da EPAMIG em Lavras, de mar o a setembro de 1994. O delineamento experimental foi de blocos ao acaso com quatro repeti es e sete tratamentos, constituídos das cultivares Granex 33, Texas Grano 502, Crioula, Pira Ouro, Baia Periforme, Jubileu e Chata Roxa com parcelas de 3,84 m2 de área útil. A produtividade de bulbos comerciais variou de 22,58 a 50,21 t/ha, destacando-se as cultivares Granex 33 (50,21 t/ha) e Texas Grano 502 (44,36 t/ha) que n o mostraram diferen a significativa entre si. Estas cultivares apresentaram incrementos na produtividade da ordem de 204,3 a 168,8% em rela o à média nacional (16,5 t/ha). O mais baixo rendimento foi observado para a cultivar Chata Roxa com 22,58 t/ha. Observaram-se varia es de 45,99 a 97,69 g/bulbo para peso médio de bulbo e 5,35 a 7,38 cm para o diametro transversal de bulbos.
Características produtivas e qualitativas de cultivares de alho
Resende Geraldo M. de,Chagas Silvio Júlio de R.,Pereira Lair Victor
Horticultura Brasileira , 2003,
Abstract: Cultivares de alho foram avaliadas quanto à produtividade e características industriais em ensaio na EPAMIG, de maio a outubro/95. O delineamento experimental foi de blocos ao acaso com quatro repeti es e sete tratamentos, constituídos das cultivares Dourado de Castro, Chines o, Gigante de Curitibanos, Gigante de Lavínia, Amarante, Cará e Gigante Roxo com parcelas de 3,68 m2 de área útil. A produtividade de bulbos comerciais variou de 7,37 a 14,72 t/ha, destacando-se as cultivares Gigante Curitibanos (14,72 t/ha) e Dourado de Castro (14,29 t/ha) que n o mostraram diferen as significativas entre si, seguidas das demais cultivares com produtividades superiores a 7,00 t/ha. Observaram-se varia es de 18,00 (Amarante) a 59,25 g/bulbo (Gigante Roxo) e 8,20 (Chines o) a 33,78 bulbilhos/bulbo (Dourado de Castro). N o se observaram diferen as significativas entre as diversas cultivares avaliadas para sólidos totais e solúveis, com valores superiores a 36,95 e 36,00%, tendo todas apresentado boas características para a industrializa o.
Características qualitativas de cultivares de cebola no sul de Minas Gerais
Chagas, Silvio Júlio de Rezende;Resende, Geraldo Milanez de;Pereira, Lair Victor;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000100013
Abstract: this study was carried out from march to september of 1995, in the experimental field of epamig, lavras-mg, brazil, with the objective of determining the physico-chemical and chemical composition of onions from different cultivars (allium cepa l.). the experimental design was completely randomized blocks with four repetitions and six cultivars as follow: baia periforme, crioula, granex 33, pira ouro, jubileu and texas grano 502. after the cure it was evaluated the ph, soluble and total solids (%), titrate acidity (%), pyruvic acid (μmol/g), total sugar, reducers and non reducers (%) and industrial index. the cultivars crioula, baia periforme, pira ouro and jubileu showed the largest concentrations of total and soluble solids. the highest acidity indexes were observed in the cultivars crioula (0.370%) and pira ouro (0.315%). the largest industrial indexes were found in the cultivars crioula (0.87) and baia periforme (0.75), and the smallest ones in the cultivars texas grano 502 (0.51) and granex 33 (0.32).
Qualidade sensorial do café de lavouras em convers?o para o sistema de produ??o organico
Malta, Marcelo Ribeiro;Pereira, Rosemary Gualberto Fonseca Alvarenga;Chagas, Silvio Júlio de Rezende;Ferreira, Daniel Furtado;
Bragantia , 2008, DOI: 10.1590/S0006-87052008000300028
Abstract: the main purpose of this study was to evaluate sensorial attributes of coffee grown under a transition cultivation system, from conventional to organic, in lavras (mg). the experiment was established in 2004, in a conventional field with 6 year-old catuaí amarelo iac86 coffee plants, planted using 4,0 x 0,6 m spacing system. the experimental design for organic treatments was the balanced lattice design 4 x 4, with five replicates in factorial scheme 3 x 2 x 2, and 4 additional treatments. three sources of organic matter were used for the factorial scheme: castor bean bran, chicken litter and cattle manure, with or without application of coffee straw and green manure with pigeonpea (cajanus cajan l. millsp.). the four additional treatments were composed by: treatment 1: cattle manure + coffee straw + coal bran + double potassium and magnesium sulphate; treatment 2: castor bean bran + coffee straw + rock bran; treatment 3: coffee straw; treatment 4: green manure. as a control, a group of coffee plants managed under conventional cultivation system was kept in the same experimental plot. in the first year, no significant differences were observed on the cup quality among grains from conventional and organic plants of all treatments. in the second year, cup quality of some organic treated plants was superior when compared to conventionally treated plants. a positive effect on sensorial attributes was observed using cattle manure, either alone or associated with coffee straw and green manure.
Caracteriza??o de lavouras cafeeiras cultivadas sob o sistema organico no sul de Minas Gerais
Malta, Marcelo Ribeiro;Theodoro, Vanessa Cristina de Almeida;Chagas, Silvio Júlio de Rezende;Guimar?es, Rubens José;Carvalho, Janice Guedes de;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000500007
Abstract: the market demands for coffee of better quality are being responsible for diffusion and adoption of new production technologies and coffee preparation. among the special coffee, the organic coffee is one of the most important in this group. so, this paper had the aim of evaluating the agronomical traits of coffee crops (coffea arabica l.) on organic system production, located in po?o fundo district, south of minas gerais. one obtained information about the management of 21 organic coffee crops, like: cultivars, coffee tree population, harvest and drying adopted systems, yield and coffee quality, soil fertility and coffee nutritional status. based on the obtained results, it is possible to conclude that coffee trees conducted under organic system production showed a potential to produce a good coffee quality. in relation to soil fertility, the low ph values and the relationship disequilibrium among k, ca and mg observed in most of the crops, suggest that these facts can affect the growth, development and coffee tree yield submitted to organic management in the south of minas gerais.
Fontes e doses de potássio na produ??o e qualidade do gr?o de café beneficiado
Silva, Enilson de Barros;Nogueira, Francisco Dias;Guimar?es, Paulo Tácito Gontijo;Chagas, Silvio Júlio de Rezende;Costa, Laerte;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000300003
Abstract: a field experiment was established on a dystrophic dusky red latosol of the epamig experimental farm at s?o sebasti?o do paraíso, mg, brazil, in february 1993, with coffee (coffea arabica l.) cultivar catuaí vermelho, line lch 2077-2-5-44, to study the effect of sources and doses of k on the yield and quality of green coffee. a randomized block experimental design with four replications was utilized, under a split-plot scheme, using three sources of k in the plots (kcl, k2so4 and k2so4.2mgso4) and four doses in the subplots (0, 100, 200 e 400 g hole-1 of k). the experiment was conducted till october 1994. in 1993 and 1994 the yield, the qualitative variables of the processed grains and the contents of k, mg, s and cl in the leaves and grains were evaluated. there was no response of yield along two years to the sources and doses of k. for the processed grains, k2so4 increased polyphenoloxidase activity and decreased total titrable acidity in the year 1993. in 1994, the same trend to polyphenoloxidase activity and total titrable acidity was observed, showing an even higher color index and favorable response in the total sugar contents. the k2so4 promoted a best quality of green coffee.
Avalia o de compostos n o-voláteis em diferentes cultivares de cafeeiro produzidas na regi o sul de Minas Gerais = Evaluation of non-volatile compounds in different cultivars of coffee cultivated in southern Minas Gerais
Marcelo Ribeiro Malta,Sílvio Júlio de Rezende Chagas
Acta Scientiarum : Agronomy , 2009,
Abstract: O presente trabalho teve como objetivo avaliar os teores de trigonelina, ácidos clorogênicos (5-ACQ) e cafeína em gr os de diferentes cultivares de cafeeiro (Coffea arabica L.). As cultivares avaliadas foram coletadas na Fazenda Experimental da Epamig em Lavras,Estado de Minas Gerais, no ano agrícola de 2005/2006. O delineamento experimental utilizado foi um inteiramente casualizado constando de oito cultivares de café com três repeti es. Foram avaliadas as cultivares: Oeiras MG 6851, Acaiá Cerrado MG 1474, CatuaíVermelho IAC 99, Rubi MG 1192, Topázio MG 1190, Mundo Novo IAC 379/19, Catucaí Amarelo 2 SL e Catuaí Amarelo IAC 62. Após a colheita dos cafés por derri a manual no pano, estes foram lavados e submetidos ao processo de descascamento e despolpamento. Depois dos gr os serem despolpados, foram secados em terreiro de cimento até atingirem 11%-12% de umidade. Os gr os de café beneficiados foram ent o moídos para a realiza o das análises de cafeína, trigonelina e 5-ACQ por cromatografia líquida de alta eficiência. Os resultados obtidos permitiram concluir que existem diferen as nos constituintes n ovoláteis entre as cultivares estudadas nas condi es ambientais de cultivo similares para todas cultivares. Catuaí Amarelo IAC 62 e Rubi MG 1192 apresentaram os maiores teores de trigonelina; Catuaí Amarelo IAC 62, Catuaí Vermelho IAC 99, Rubi MG 1192 e Oeiras MG 6851 apresentaram os maiores teores de 5-ACQ; o menor teor de cafeína foi observado na cultivar Oeiras MG 6851, seguida pela cultivar Mundo Novo IAC 379-19. This research was conducted to evaluate trigonelline, chlorogenic acids (5-CQA) and caffeine contents in grains of different cultivars of coffee (Coffea arabica L). The cultivars were colleted at the Experimental Farm of the EPAMIG-Lavras, Minas Gerais state, during 2005/2006. The experimental design was completely randomized with eight cultivars of coffee: Oeiras MG 6851, Acaiá Cerrado MG 1474, Catuaí Vermelho IAC 99, Rubi MG 1192, Topázio MG 1190, Mundo Novo IAC 379-19, Catucaí Amarelo 2 SL and Catuaí Amarelo IAC 62. After the harvest on cloth, the fruits were depulped and washed. After theremoval of parchment, the grains were dried until reaching 11%-12% moisture. The samples were submitted to caffeine, trigonelline and 5-CQA analysis by HPLC. The cultivars showed differences in the non-volatile compounds under same crop management environment for allcultivars. Catuaí Amarelo IAC 62 and Rubi MG 1192 showed the highest trigonelline contents; Catuaí Amarelo IAC 62, Catuaí Vermelho IAC 99, Rubi 1192 and Oeiras MG 6851 showed the highest 5-CQ
Integra??o de dados do quickbird e atributos do terreno no mapeamento digital de solos por redes neurais artificiais
Chagas, César da Silva;Carvalho Júnior, Waldir de;Bhering, Silvio Barge;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000300004
Abstract: this study evaluated different environmental variables in the digital soil mapping of an area in the northern region of minas gerais state, using artificial neural networks. the environmental variables terrain attributes (slope and compound topographic index), the quickbird bands 1, 2 and 3, and lithology were evaluated. the importance of each of the variables in the classification was tested. the "java neural network simulator" was used with the backpropagation learning algorithm. for each dataset a neural network was created to predict the soil mapping units, and the map produced by the nets was compared with the conventional, to show the general accuracy of each one. the best classification was achieved when all variables were used, with an accuracy of 67.4 % compared to the the conventional soil map. of the variables, slope was most significant, because when excluded from the dataset, the classification was worst (accuracy 33.7 %). this result showed that the approach can contribute to overcome some problems of soil mapping in brazil, especially at scales larger than 1:25,000, with faster and cheaper execution, mainly if remote sensing data with high spatial resolution and an affordable price are available, and good digital elevation models to generate the terrain attributes in the geographical information systems.
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