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| Registros recuperados: 2.661 | |
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| Santos,Rerisson José Cipriano dos; Lira,Mário de Andrade; Guim,Adriana; Santos,Mércia Virgínia Ferreira dos; Dubeux Junior,José Carlos Batista; Mello,Alexandre Carneiro de Leão de. |
| Ensiling warm-season grasses often requires wilting due to their high moisture content, and the presence of low-soluble sugars in these grasses usually demands the use of additives during the ensiling process. This study evaluated the bromatological composition of the fodder and silage from five Pennisetum sp. clones (IPA HV 241, IPA/UFRPE Taiwan A-146 2.114, IPA/UFRPE Taiwan A-146 2.37, Elephant B, and Mott). The contents of 20 Polyvinyl chloride (PVC) silos, which were opened after 90 days of storage, were used for the bromatological analysis and the evaluation of the pH, nitrogen, ammonia, buffer capacity, soluble carbohydrates, and fermentation coefficients. The effluent losses, gases and dry matter recovery were also calculated. Although differences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pennisetum purpureum; Grass silage; Fermentation process; Fodder; Quality. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000100002 |
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| Giasson,Elvio; Clarke,Robin Thomas; Inda Junior,Alberto Vasconcellos; Merten,Gustavo Henrique; Tornquist,Carlos Gustavo. |
| Soil surveys are necessary sources of information for land use planning, but they are not always available. This study proposes the use of multiple logistic regressions on the prediction of occurrence of soil types based on reference areas. From a digitalized soil map and terrain parameters derived from the digital elevation model in ArcView environment, several sets of multiple logistic regressions were defined using statistical software Minitab, establishing relationship between explanatory terrain variables and soil types, using either the original legend or a simplified legend, and using or not stratification of the study area by drainage classes. Terrain parameters, such as elevation, distance to stream, flow accumulation, and topographic wetness... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GIS; DEM; Soil survey; Terrain analysis. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300008 |
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| Reis Jr.,Roberto dos Anjos; Martinez,Hermínia E. P.. |
| A crescente exigência de nutrientes, especialmente micronutrientes, pelos cultivares de café vem exigindo uma melhor compreensão da dinâmica desses nutrientes no sistema solo-planta. Com o objetivo de avaliar o efeito de concentrações de Zn (0,4 ; 1,3 e 2,3 mimol Zn L-1) na solução nutritiva sobre o crescimento, produção de matéria seca, eficiência de absorção, translocação e utilização de Zn e P em dois cultivares de café (Coffea arabica cv. Catuaí e Coffea canephora cv. Conilon), foi realizado um experimento sob delineamento inteiramente casualizado com esquema fatorial 3 × 2 (três doses de Zn e dois cultivares) com três repetições. Plantas de café dos dois cultivares estudados foram cultivadas em casa de vegetação, com solução nutritiva completa por 50... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C. arabica cv. Catuaí; C. canephora cv. Conilon; Café. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300019 |
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| Cerezini,Paula; Fagotti,Dáfila dos Santos Lima; Pípolo,Antonio Eduardo; Hungria,Mariangela; Nogueira,Marco Antonio. |
| ABSTRACT Biological nitrogen fixation (BNF) is essential to the economic viability of the soybean [Glycine max (L.) Merrill] crop in Brazil, but drought may impair the BNF processes. We evaluated physiological traits of nitrogen fixation drought-tolerant (NFDT) (R01-581F, R01-416F and R02-1325) and drought-susceptible (CD 215 and BRS 317) genotypes of soybean subjected to drought or regular water supply between 45 and 55 days after emergence, in an experiment under greenhouse conditions in pots containing non-sterile soil. R01-581F had more stable photosynthetic and transpiration rates, and higher intercellular CO2 levels under drought. Drought reduced the chlorophyll concentration in all genotypes, but with less intensity in R01-581F and R02-1325. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Abiotic stress; Nodulation; Total soluble sugars; Ureides. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200110 |
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| Castro,Damián César; Álvarez,Norma; Gabriel,Paola; Micheloud,Norma; Buyatti,Marcela; Gariglio,Norberto. |
| The crop load level of an apple (Malus × domestica Borkh.) tree impacts fruit yield and quality parameters, tree vigor and biennial bearing. The optimal crop load is that which allows for consistent annual cropping and fruit quality acceptable to the market. We evaluated the effect of crop load on yield and fruit quality of two low-chill apples cv. ‘Caricia’ and ‘Eva’, growing in a mild winter area. During 2010 and 2011 crop load was manually adjusted from 2 or 3 to 17 fruits cm−2 of trunk cross-sectional area (TCSA). Fruit yield was positively related to crop load in both cultivars but mean fruit weight diminished as the crop load increased. For both cultivars, the production of non-commercial and small-sized fruit increased, whereas production of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Crop load; Hand thinning; Trunk cross-sectional area; Fruit quality. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300237 |
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| Carvalho,Carlos Alfredo Lopes de; Marchini,Luis Carlos. |
| Os tipos polínicos coletados no mesmo pasto apícola por Nannotrigona testaceicornis e Tetragonisca angustula (Hymenoptera, Apidae, Meliponinae) foram estudados e comparados durante dois meses em Piracicaba-SP, (22o43'S; 47o25'W; altitude: 580m). As massas de pólen foram obtidas através da captura de operárias que retornavam à colônia das 5:00 às 19:00 horas nos meses de outubro e novembro de 1996. Trinta e um tipos polínicos pertencentes a 22 famílias foram identificados, dos quais 22,58% foram coletados exclusivamente por N. testaceicornis, 35,48% por T. angustula e 41,94%, por ambas as espécies. As famílias Fabaceae, Liliaceae, Mimosaceae e Myrtaceae e as espécies Bulbine frutescens, Eucalyptus spp., Leucaena leucocephala e Tipuana tipu foram as mais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelhas sem ferrão; Pólen; Plantas. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000300029 |
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| Pacheco,Camilla de Andrade; Martelli,Ivan Bortolato; Polydoro,Denis Augusto; Schinor,Evandro Henrique; Pio,Rose Mary; Kupper,Kátia Cristina; Azevedo,Fernando Alves de. |
| Caused by Alternaria alternata, Alternaria brown spot (ABS) is a major fungal disease of mandarins in Brazil, causing serious losses in commercial orchards of Ponkan tangerine (Citrus reticulata Blanco) and Murcott tangor [C. sinensis (L.) Osbeck × C. reticulata Blanco]. The response of 31 accessions/genotypes of mandarins and their hybrids to A. alternata, was evaluated in São Paulo state, Brazil. The incidence and severity of the disease in fruit were evaluated in the field, using diagrammatic scale, four times during 2008 and 2009. Based on these data, the area under the disease progress curve (AUDPC) was calculated. In parallel, in vivo and in vitro inoculations with A. alternata were made on leaves to confirm field results. Resistance and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus spp.; Alternaria brown spot; Fungus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000600007 |
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| Albuquerque,Teresinha Costa Silveira de; Dechen,Antonio Roque. |
| A proposta deste trabalho foi detectar a capacidade de absorção de macronutrientes nos porta-enxertos de videira Tropical - IAC 313, Jales - IAC 572, Campinas - IAC 766, Dog Ridge, Salt Creek e Harmony de possível utilização para as cultivares Thompson Seedless e Italia. Os porta-enxertos e as produtoras foram propagados por estacas semi-lenhosas com 2 gemas, enraizadas em areia grossa lavada até que o sistema radicular permitisse o transplantio para recipientes de 3L de volume, contendo 2 partes de sílica e 1 parte de areia grossa. As mudas foram uniformizadas através de poda, tanto do sistema radicular quanto da parte aérea. A solução nutritiva foi aplicada por irrigação em sistema fechado de gotejamento, acionado por temporizador. Quando as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis sp.; Uva apirena; Porta-enxerto; Nutrição mineral; Vitis sp.; Seedless grapevines; Rootstock; Mineral nutrition. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100022 |
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| Leite,Vagner Maximino; Rosolem,Ciro Antonio; Rodrigues,João Domingos. |
| Soybean is an important crop in Brazil. Nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. To better understand the role of these compounds, a pot experiment was carried out to study effects of GA3 and cytokinin on the vegetative growth of the soybean. GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Gibberellic acid; Gibberellin; Aminopurin; Plant growth regulator. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300019 |
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| Kluge,R.A.; Cantillano,R.F.F.; Jorge,R.O.. |
| Com o objetivo de avaliar o efeito do TAL-PROLONG (ésteres de sacarose), ameixas 'Santa Rosa' foram armazenadas por 21 dias a 0°C e 90-95% UR (+ 3 dias de comercialização simulada em temperatura ambiente). As doses do TAL-PROLONG utilizadas foram 0; 0,5; 1,0; 1,5 e 2,0%, aplicadas antes do armazenamento por imersão das frutas. As frutas tratadas com TAL-PROLONG apresentaram menores perdas de peso durante o armazenamento e comercialização simulada. Houve menor incidência de podridões e desintegração interna de polpa nas frutas tratadas com TAL-PROLONG, o qual foi também eficiente na manutenção da coloração das frutas. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ésteres de sacarose; Desintegração interna; Perda de peso; Ameixas; Prunus salicina; Armazenamento. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000300016 |
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| Soares,Ana Cristina Fermino; Sousa,Carla da Silva; Garrido,Marlon da Silva; Perez,Jane Oliveira. |
| Actinomycetes are important plant disease control and growth promotion agents, which makes it necessary to develop technology to produce large quantities of inoculum for green-house and field work. The present study had the objective of evaluating the growth of several isolates of Streptomyces in sterile rice for inoculum production. The sterile rice was inoculated with isolates of S. thermotolerans, S. griseus subsp. griseus, Streptomyces sp. N0035, S. purpurascens, and Streptomyces sp., and incubated at 28 ± 2ºC. Five days after its inoculation, mycelial growth and sporulation was observed for all Streptomyces isolates on the rice grains. Twelve days after incubation, the colonized rice was transferred to envelopes of dark brown paper and let to dry in... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Actinomycetes; Biological control; Growth substrates. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600013 |
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| Silva,Alexandre Marco da; Nalon,Marco Aurélio; Kronka,Francisco José do Nascimento; Alvares,Clayton Alcarde; Camargo,Plinio Barbosa de; Martinelli,Luiz Antonio. |
| Information about the land cover of a region it is a key information for several purposes. This paper aimed to elaborate land-cover maps using digital satellite images obtained in 1997 from seven watersheds (Piracicaba, Moji-Guaçu, Alto Paranapanema, Turvo Aguapeí, Peixe, and São José dos Dourados) located in the State of São Paulo, southeastern Brazil. Additionaly, this study evaluated the relationship between land-cover and slopes of the terrain of the seven watersheds. A third objective was to estimate the percentage of riparian vegetation currently remaining along the streams in a 30-meter width buffer zone. Three research questions were posed: i) What is the dominant land-cover of these watersheds? ii) Is the riparian vegetation well preserved in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land planning; Land management; Geoprocessing; Catchments; Rivers. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400003 |
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| Santos,A.B. dos; Costa,J.D.. |
| Visando determinar os efeitos do espaçamento entre linhas (30, 40 e 50 cm) e da densidade de semeadura (50, 100 e 150 sementes/m²) sobre o rendimento de grãos e algumas características biométricas de duas variedades de arroz (Oryza sativa L.), com e sem irrigação suplementar, foram conduzidos quatro experimentos em solo de cerrado, sendo dois com a variedade Araguaia e os outros com a 'Guarani'. A irrigação propiciou incremento de 90 e 35% no rendimento de grãos das v. Araguaia e Guarani, respectivamente, influenciando significativamente todas as características biométricas estudadas. A v. Guarani apresentou maior produção de grãos no menor espaçamento e na densidade de 130 sementes por m², e o seu índice de colheita (IC) foi correlacionado linear e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Espaçamento entre linhas; Densidade de semeadura; Rendimento; Características biométricas; Irrigação. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000100002 |
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| BACCHI,O.O.S.; REICHARDT,K.; VILLA NOVA,N.A.. |
| Fractal scaling has been applied to soils, both for void and solid phases, as an approach to characterize the porous arrangement, attempting to relate particle-size distribution to soil water retention and soil water dynamic properties. One important point of such an analysis is the assumption that the void space geometry of soils reflects its solid phase geometry, taking into account that soil pores are lined by the full range of particles, and that their fractal dimension, which expresses their tortuosity, could be evaluated by the fractal scaling of particle-size distribution. Other authors already concluded that although fractal scaling plays an important role in soil water retention and porosity, particle-size distribution alone is not sufficient to... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Fractal; Particle size distribution; Pore size distribution; Soil water retention; Soil hydraulic conductivity. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000200027 |
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| Alleoni,Ana Cláudia Carraro; Antunes,Aloísio José. |
| The functional properties of foods can be preserved when they are coated with edible films, since both the loss of moisture and the transport of O2 and CO2 are reduced. The objectives of this work were: to compare weight loss, Haugh units, and albumen pH between fresh eggs and eggs coated with whey protein concentrate (WPC), under six storage periods (3, 7, 10, 14, 21 and 28 days), at 25°C. During the entire storage period, regardless of whether the eggs were coated or not, the Haugh unit values and the weight loss decreased, and differences between values from the first to the last period were lower for coated eggs. Albumen pH increased. The Haugh unit values for coated eggs were similar to those found in literature references when the same storage period... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: WPC coating; Egg quality; Haugh unit; Weight loss. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300006 |
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| Registros recuperados: 2.661 | |
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