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Registros recuperados: 755 | |
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Alzate G,Adriana Mercedes; Vallejo Cabrera,Franco Alirio; Ceballos Lascano,Hernán; Pérez,Juan Carlos; Fregene,Martín. |
Usando la técnica de marcadores moleculares, tipo microsatélites, se evaluó la variabilidad genética de 717 genotipos de yuca Manihot esculenta Crantz colectados en fincas de pequeños agricultores de la región Caribe de Colombia, en los departamentos de Atlántico, Magdalena, Córdoba y Sucre. Mediante el Análisis de Correspondencia Múltiple (ACM) se establecieron seis grupos genéticamente diferentes, con un Gst bajo (0.18), lo cual indica que la variabilidad no se debe a diferencias entre los grupos sino a diferencias dentro de cada grupo. La diversidad genética encontrada fue alta (H T: 0.61692). |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta; Diversidad; Distancia genética; Heterocigotos. |
Ano: 2010 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000400001 |
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Cantarelli,Leandro Damero; Braga Schuch,Luis Osmar; Tavares,Lizandro Ciciliano; Rufino,Cassyo de Araújo. |
O objetivo foi avaliar a variabilidade entre plantas dentro de populações de soja estabelecidas em sementes com diferentes níveis de qualidade fisiológica (germinação de 96, 82 e 70%, respectivamente). Foram utilizados lotes de sementes de soja, cultivar CD 202, em três níveis de qualidade (alta, média e baixa). As parcelas foram constituídas por 1 linha de 7 m de comprimento espaçadas das demais parcelas 0.45 m. O delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições. Dentro das linhas de semeadura foram dispostas cerca de 50 sementes visando obter uma emergência com excesso de plantas para posterior desbaste. A população inicial após o desbaste foi de 32 plantas/m². Para avaliação das variáveis respostas coletou-se todas as... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Sementes de soja; Vigor; Germinação; Distribuição espacial de plantas. |
Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122015000300005 |
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Molineros Hurtado,Francisco H; Mosquera-Espinosa,Ana T; Gómez-Carabalí,Arnulfo; Otero,J. Tupac. |
El chontaduro Bactris gasipaes es un cultivo tropical importante del cual se cosechan los frutos o los palmitos. En el estudio se evaluaron los niveles de colonización de las raíces, se realizaron conteos de esporas en el suelo y la identificación de morfotipos de hongos micorrízicos arbusculares (HMA) asociados a cultivos de B. gasipaes en el áreas rural de Citronela y Zabaletas, municipio de Buenaventura, Departmento de Valle del Cauca, Colombia, durante tres periodos de entre 2006 y 2007, para determinar la influencia de la pluviosidad en la colonización de HMA. Los porcentajes de colonización en Citronela variaron entre 58% y 90% mientras que en Zabaletas la colonización de raíces varió entre 63% y 79%. El número promedio de esporas en 50 g de suelo... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bactris gasipaes; Buenaventura; Glomus; Hongos micorrízicos arbusculares (HMA); Morfotipos. |
Ano: 2013 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122013000400008 |
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Pérez-Bernal,Maylin; Lorenzo Salinas,Daylenis; Delgado Rigo,Magalis. |
Se evaluó la viabilidad de semillas de arroz índica (Oryza sativa L.) variedad IACuba-28 provenientes de plantas cultivadas in vitro. Dichas semillas fueron conservadas en bolsas de plástico durante 0, 2, 5, 7, 9 y 12 años en un banco de semillas a 4 °C y 34% de humedad relativa. La prueba de germinación se realizó en una muestra aleatoria de las accesiones A2000, A2003, A2005, A2007, A2010, A2012 y como prueba bioquímica se determinó la actividad alfa-amilasa en las semillas en germinación. En ambas determinaciones se incluyeron controles positivos con semillas nuevas obtenidas de plantas cultivadas en campo. Se halló una reducción progresiva del porcentaje de germinación, a medida que aumentó el tiempo de conservación en banco de germoplasma, así, a los... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actividad alfa-amilasa; Cultivo in vitro; Prueba de germinación. |
Ano: 2013 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122013000200004 |
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Domingues Lima.,Juliana; de Souza Bravo.,Natália; Rozane.,Danilo Eduardo; Nomura.,Edson Shigueaki; Gorla da Silva.,Silvia Helena Modenese; Gomes,Eduardo Nardini. |
Abstract Pseudostem is an abundant residue after harvesting of the banana bunch, serving as a source of water, nutrients and organic substances. The present study aimed to evaluate the effect of pseudostem waste on ‘Nanica’ banana (Musa spp. AAA) cultivar in greenhouse under contrasting environmental conditions. For this, an experiment was carried out in in the Sao Paulo State University -UNESP in a randomized block design in a 2 x 2 factorial scheme (presence or absence of waste and two seasons), consisting of four replicates of three experimental plots with two pots per plant. One season was early November/2018 (Summer) and the other half of May/2019 (Winter). A 40 cm portion of the pseudostem collected from of a freshly harvested plant was sectioned... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetables residues; Nutrient cycling; Growth promoting substances. |
Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000300228 |
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Gurski,Bruno César; Moretti de Souza,Jorge Luiz; Gerstemberger,Emerson; de Oliveira,Ricardo Augusto. |
Abstract In a site with a Cfa-type climate in southern Brazil, the water requirements and restrictions for the cultivation of sugar cane (Saccharum spp.), in plant and soca (second cut) were characterized. Water availability was calculated based on the daily water balance and evapotranspiration was estimated using the Penman-Monteith method. The thermal and water requirements of sugarcane were calculated taking as reference the agroecological zoning in the state of Paraná, Brazil. Water requirement index did not show limiting factors for the development of the crop both in plant and soca. Water deficit was the most important agroclimatic risk factor. In Paranavaí-PR, Brazil, sugarcane is a safe crop, with possibilities of saving water in the development... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climate Sacharum spp. Southern Brazil Water balance; Water deficit; WRSI. |
Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000200136 |
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Sánchez-Díaz,Baltazar; Vargas-Villamil,Luis Manuel; Zavala-Cruz,Joel; Rivero-Bautista,Nydia del; González-Camacho,Juan Manuel; Crespo-Pichardo,Guillermo; Menéndez-Domínguez,Víctor Hugo. |
Abstract The researchers propose a methodology to share, process, and exchange agricultural information among different applications through a Web service. The Web service will be available online and mobile and can be used as a tool for decision-making. Initially, agricultural regions and cartography of the study area were identified. Subsequently, a simulation model of potential yield of pasture and animal behavior by regions and area were designed, respectively. Finally, a Web service, using Amazon Web Services and REST for exchanging information, was developed. Web services in the cloud, enable interoperability using data, mapping information of agricultural regions, simulation models, and protocols for data transfer, thus making available the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural regions; Cloud; Interoperability; Mobile; Simulation model. |
Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100049 |
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Schwarz,Kélin; Vilela-Resende,Juliano Tadeu; Pierozan-Junior,Clovis; Paula,Juliana Tauffer-de; Baier,João Eduardo; de Souza-Silva,Maria Ligia; Brendler-Oliveira,Felipe. |
Abstract In strawberry, potassium fertilization has been little studied, which difficult management strategies for an increasing yield and understanding the use of this nutrient in strawberry crop. The aim of this study was to evaluate the influence of sources and rates of potassium (K) fertilizers on yield, K level and agronomic traits of strawberry cv. Camarosa fruit, carried out under greenhouse conditions. A randomized in a completely block design with four replicates in a factorial arranged 6x3 (six rates of potassium x three sources of potassium fertilizers), was performed. Fertilizers sources used were as follows: potassium sulphate, potassium nitrate and potassium chloride in 0, 60, 120, 180, 240 and 300 kg ha-1 K2O doses. An increasing potassium... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizer application; Nutrient balance (plants); Nutritional status; Plant nutrition; Potassium content in leaves; Potassium extraction. |
Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100114 |
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Bernardo Gongalves,Gábríel Moreno; Mayer,Luana Burg; Souza,Rosenilda de; Ogliari,Juliana Bernardi. |
Abstract The aim of this study was to evaluate grain yield (GY), popping expansion (PE), popping expansion disregarding the weight of unpopped kernels (PEW), and eleven other agronomic and morphological traits of 14 local popcorn varieties (LPV) from far west of the state of Santa Catarina, Southern Brazil. Two experiments were carried out, in a completely randomized block design with three replications, in different regions of Santa Catarina: one in the municipality of Florianópolis (east coast) and the other in Anchieta (western). Grain yield had the highest positive correlation with prolificacy (PRL) (r = 0.72) and number of grains per row (NGR) (r = 0.71), and a negative correlation with caryopsis circularity index (CCI) (r = -0.67). Variable PEW... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrobiodiversity; Genetic potential; Landrace; Phenotypic correlation; Pre-breeding; Zea mays L. |
Ano: 2019 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000300213 |
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Prieto,Javier Matías; Cruz Sobrado,Verónica. |
Abstract Stevia (Stevia rebaudiana Bertoni) is gaining attention due to its sweetening power. The stevia crop is still relatively unknown in Europe, and very little is known about its nutrient requirements. Therefore, agronomic studies are needed. Field trials were carried out in inland Spain in 2014 and 2015, in order to evaluate the yield, quality, and nutrient requirements of stevia according to planting density and harvest regime, under a continental Mediterranean climate. In 2014, the dynamics of growth, quality and accumulation of nutrients were studied during the vegetative period according to three planting densities (5.0, 7.5, and 10.0 plants m-2). No significant influence was found. The steviol glycosides concentration decreased sharply at... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative crops; Fertilization; Stevia rebaudiana; Steviol glycosides; Sweetener.. |
Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000400421 |
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Registros recuperados: 755 | |
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