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Crescimento do girassol sob sistema de captação de água “in situ” e adubação orgânica Full text
2014
Jose Alberto Calado Wanderley | Carlos Alberto Azevedo | Marcos Eric Brito | Francisco Cassio Alvino | Jose da S. Sousa
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoBodyText2" style="margin-bottom: 0.0001pt; text-align: justify;"><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">A</span><span style="font-size: 10.0pt;" lang="X-NONE"> importância econômica</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;"> do </span><span style="font-size: 10.0pt;" lang="X-NONE"> girassol é devido principalmente o óleo extraído de suas sementes, como também expressa potencialidade no uso forrageiro, podendo ser cultivado na região semiárida nordestina, onde se caracteriza pelas irregularidades das chuvas, todavia, o cultivo pode ser limitado pela baixa disponibilidade hídrica e adubação inadequada, nesse sentido, objetivou-se avaliar o crescimento do girassol </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">cultivado </span><span style="font-size: 10.0pt;" lang="X-NONE">sob sistema de captação de água e adubação orgânica. O experimento foi instalado em campo, da UFCG, Campus de Pombal, onde foram testado, em DBC, fatorial 4 x 5, sendo quatro sistemas de cultivo: camalhão, sulco</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">, </span><span style="font-size: 10.0pt;" lang="X-NONE">bacias</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;"> e em plantio convencional</span><span style="font-size: 10.0pt;" lang="X-NONE"> combinadas a cinco níveis de esterco ( 0 - 2,5 – 5 - 7,5 e 10 L m<sup>-2</sup> ), em seis repetições. Aos </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">20, 40, 60 e 80</span><span style="font-size: 10.0pt;" lang="X-NONE"> dias após a semeadura, realizou-se avalia</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">ções </span><span style="font-size: 10.0pt;" lang="X-NONE">: diâmetro de caule ao nível do solo, altura de planta, e número de folhas</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;"> e, ao 84 DAS determinou-se a área foliar </span><span style="font-size: 10.0pt;" lang="X-NONE">.</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">N</span><span style="font-size: 10.0pt;" lang="X-NONE">o transcorrer do experimento foram realizadas irrigações suplementar as precipitações, com base na ETo</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">.</span> <span style="font-size: 10.0pt;" lang="X-NONE">Constatou-se </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;"> efeito combinado entre </span><span style="font-size: 10.0pt;" lang="X-NONE"> técnicas de captação de água </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">e</span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">quantidades de esterco </span><span style="font-size: 10.0pt;"> </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;"> no crescimento </span><span style="font-size: 10.0pt;" lang="X-NONE"> do girassol . </span><span style="font-size: 10.0pt; mso-ansi-language: PT-BR;">Plantas de girassol cultivadas na linha do camalhão e </span><span style="font-size: 10.0pt;" lang="X-NONE">adubação com esterco bovino aumenta a área foliar.</span><span lang="X-NONE"> <span class="msoDel"><del cite="mailto:BETO" datetime="2014-01-22T20:26"> </del></span></span></p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas 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Show more [+] Less [-]Biotransferencia de flúor de agua a diferentes tejidos de pejerrey (<i>Odontotesthes bonariensis</i>) Full text
2014
Puntoriero, María Laura | Volpedo, Alejandra | Fernández Cirelli, Alicia
The presence of fluorine (F), toxic trace element, has relevance in the trophic chain because it can biotrasfer to different levels. It can come from water as food, being chronic ingestion harmful to human beings. Fluorine was found in different water bodies of southwest of Buenos Aires. Chasicó Lake has the highest fluorine concentration. This water body is the most important for commercial and recreational fishing silverside (Odontesthes bonariensis) of the area. The aim of this paper is to analyze the biotransfer of F from water to different silverside tissues in Chasicó Lake. Fish organs were subjected to an alkaline digestion. Fluorine was determined using a fluoride ion selective electrode. F concentrations were 6,4-8,5 mg/L in water and in fish tissues were in gonads: 4,2 to 69,4 μg/g , in liver: 7,1 to 75,3 μg/g , in gills: 49,1 to 110,1 μg/g , in vertebrae: 70,2 to 457,9 μg/g and in muscle: 5,1 to 86,8 μg/g . The concentrations found in muscle were higher than the maximum limit allowable for human consumption, according to CAA (1,5 μg/g). Whereas silverside is a native fish of major commercial importance in Buenos Aires Province, it is important to perform studies on the fluorine concentration to ensure quality for human consumption. | Facultad de Ciencias Naturales y Museo
Show more [+] Less [-]Efecto de la calidad de agua para riego complementario sobre algunas propiedades químicas edáficas Full text
2014
Aparicio, Virginia Carolina | Barbacone, Alejandro | Costa, José Luis
El objetivo del presente estudio fue evaluar la incidencia de diferentes combinaciones de agua de riego (agua desmineralizada y agua salinizada artificialmente en laboratorio), sobre la conductividad eléctrica (CE), relación de adsorción de sodio (RAS), pH, porcentaje de sodio de intercambio (PSI), y porcentaje de saturación con bases (PSB) de suelos paleudoles petrocalcicos del sudeste de Buenos Aires. Se realizó un experimento en invernáculo, utilizando columnas de suelo de 30 cm de largo, donde se sembró raigrás perenne (Lolium perenne). Se establecieron cinco tratamientos de riego: W0 (100% de agua desmineralizada), W1 (30% de agua con bajo RAS y 70% de agua desmineralizada); W2 (50% de agua de bajo RAS y 50% de agua desmineralizada); W3 (30% de agua de alto RAS y 70% de agua desmineralizada); W4 (50% de agua con alto RAS y 50% de agua desmineralizada). A medida que la proporción de agua artificialmente salinizada fue mayor que la de agua desmineralizada, los valores de PSI y CE se incrementaron especialmente a nivel superficial (10 cm). El agua artificial de RAS=12,5 produjo un aumento considerable del PSI=19,8 en comparación con el tratamiento testigo. Considerando el efecto de dilución del agua de lluvia fue posible establecer una ecuación que permite estimar para determinada calidad de agua de riego que valor del RAS alcanzaría el suelo. | The aim of this study was to evaluate the incidence of different combinations of irrigation water (demineralized and artificially salinized in the laboratory) on the electrical conductivity (EC), sodium adsorption ratio (SAR), pH, exchangeable sodium percentage (ESP), and percent base saturation of two petrocalcic Paleudolls of Argentina. An experiment was conducted in a greenhouse, where 30-cm long soil columns were seeded with perennial ryegrass (Lolium perenne). Five water treatments were established: W0 (100 % distilled water), W1 (30% water with low RAS and 70% distilled water), W2 (50% water of low SAR and 50% distilled water), W3 (30% water of high RAS and 70% distilled water), and W4 (50% water with high RAS and 50% distilled water). Since the artificially salinized water proportion was greater than the demineralized water, the EC and ESP values increased mainly at the surface (0-10 cm). The artificial water SAR=12.5 produced a significant increase in ESP=19.8 compared with the control treatment. Considering the dilution effect of rain, an equation was developed to estimate the value of soil RAS for a given quality of irrigation water value.
Show more [+] Less [-]Teor de óleo do pinhão manso com adubação fosfatada e irrigado com água residuária Full text
2014
Silvana Silva Medeiros | Hugo Orlando Carvallo Guerra | Vera Lúcia Antunes Lima | Carlos Alberto Vieira Azevedo | Tainara Tâmara Santiago Silva
<span style="font-size: 12.0pt; line-height: 115%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: PT-BR; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Considerando as potencialidades de uso do pinhão manso (Jatropha curcas L.) como fonte energética e a carência de resultados de pesquisa relativos ao seu cultivo foi desenvolvido na Universidade Federal de Campina Grande-PB, um trabalho comparando níveis de água residuária e adubação fosfatada na produção do pinhão manso sob ambiente protegido de casa de vegetação. O delineamento experimental foi realizado em blocos casualizados em esquema fatorial [4 x 5] + 1, cujos fatores foram quatro níveis de água residuária disponível no solo (50, 75, 100 e 125%) e cinco doses de fósforo (0, 100, 200, 300 e 400 mg/kg de solo) e uma testemunha absoluta com água de abastecimento 100% com adubação exclusiva só de N e K, com três repetições, perfazendo assim um total de 63 parcelas experimentais. Onde para o fator estudado teor de óleo do pinhão manso, apresentou resultados significativos em relação à aplicação de água residuária, rica em nutrientes essenciais para o crescimento e produção do pinhão manso.</span>
Show more [+] Less [-]Fisiografías, recursos vegetales y alternativas de manejo en el parque estatal Agua Blanca, Tabasco Full text
2014
Ofelia Castillo Acosta | Joel Zavala-Cruz
La presente investigación se llevó a cabo en el parque estatal Agua Blanca, municipio de Macuspana. donde aún se conservan 2,000 ha de selva mediana perennifolia. Para obtener el articulo completo pueden contactar al Editor de la Revista Ecosistemas y Recursos Agropecuarios en el siguiente correo electrónico era@ujat.mx y se les enviará sin algún costo.
Show more [+] Less [-]Germinação da vinagreira em função de cinco níveis de salinidade da água de irrigação Full text
2014
Mariana Alexandre de Lima Sales | Francisco José Carvalho Moreira | Waleska Martins Eloi | Aureliano de Albuquerque Ribeiro Ribeiro | Solange Lopes Nogueira
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal" style="margin-bottom: .0001pt; text-align: justify; line-height: normal;"><span style="font-size: 12.0pt; font-family: 'Times New Roman','serif'; mso-fareast-language: PT-BR;">Normalmente, problemas de salinidade surgem quando os sais contidos na água de irrigação se acumulam na região do solo onde se encontra o sistema radicular das culturas e, com isto, seus rendimentos são afetados negativamente. Este ensaio teve por objetivo avaliar a germinação de vinagreira em função de cinco níveis de salinidade da água de irrigação. O trabalho foi realizado </span><span style="font-size: 12.0pt; font-family: 'Times New Roman','serif';">Laboratório de Análises de Solos e Água e em casa de vegetação, ambos localizados no IFCE, <em style="mso-bidi-font-style: normal;">Campus</em> de Sobral. No Ensaio I realizou-se testes preliminares que possibilitaram a construção de curvas artificiais de salinidade e no Ensaio II estudou-se os efeitos destes diferentes níveis de salinidade da água de irrigação, (T<sub>1</sub> = testemunha – 0,17; T<sub>2</sub>=1,5; T<sub>3</sub>=2,5; T<sub>4</sub>=3,5; T<sub>5</sub>=4,5 e T<sub>6</sub>=5,5 dS m<sup>-1</sup>). As variáveis analisadas foram primeira contagem da germinação (PCG), porcentagem de germinação (%Germ), índice de velocidade de germinação (IVG) e tempo médio de germinação (TMG). 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Show more [+] Less [-]Importância da qualidade e do manejo da água na produção de frangos de corte. Full text
2014
KRABBE, E. L. | ROMANI, A.
Hongos anamorfos asociados a restos vegetales del Parque Estatal "Agua Blanca", Macuspana, Tabasco, México Full text
2014
Martínez-Rivera,Karen | Heredia,Gabriela | Rosique-Gil,Edmundo | Cappello,Silvia
La riqueza fúngica de las áreas protegidas del estado de Tabasco ha sido pobremente estudiada. En su mayoría, las especies saprobias microscópicas aún se desconocen. La presente contribución tiene como objetivo documentar la composición de hongos anamorfos que proliferan en los restos vegetales de la selva del Parque Estatal "Agua Blanca". En total se presentan 40 taxones, entre los cuales se incluyen 15 que no se conocían para México y 25 para el estado de Tabasco. De todos los registros nuevos a nivel nacional, junto con su descripción morfológica, se anexan ilustraciones, información sobre la distribución geográfica conocida y observaciones sobre sus caracteres de interés taxonómico.
Show more [+] Less [-]Infiltración de agua y medición del caudal de arroyos en la Sierra de Quila Full text
2014
Villavicencio García, Raymundo(Universidad de Guadalajara Centro Universitario de Ciencias Biológicas y Agropecuarias Departamento de Producción Forestal) | Martínez Ramírez, Bárbara Romina(Universidad de Guadalajara Centro Universitario de la Costa Sur) | Toledo González, Sandra Luz(Universidad de Guadalajara Centro Universitario de Ciencias Biológicas y Agropecuarias Departamento de Producción Forestal) | Guevara Gutiérrez, Rubén Darío(Universidad de Guadalajara Centro Universitario de la Costa Sur Departamento de Ecología y Recursos Naturales) | Ávila Coria, Rosaura(Universidad de Guadalajara Centro Universitario de Ciencias Biológicas y Agropecuarias Departamento de Producción Forestal)
Con el objeto de determinar la capacidad de infiltración y calcular el caudal natural de los arroyos que abastecen de agua potable al poblado de Tecolotlán, Jalisco, se midió el escurrimiento máximo de cinco arroyos ubicados en tres microcuencas de la parte central y suroeste de la Sierra de Quila de mayo de 2012 a mayo de 2013 con el método Sección-velocidad. Para determinar la infiltración y el análisis del volumen medio anual de escurrimiento se utilizó el método indirecto Precipitación-Escurrimiento, según la NOM-011-CNA-2000. Se definieron siete sitios para el cálculo de las corrientes y dos más sobre las tomas de agua que suministran a los depósitos de Tecolotlán. Con base en la densidad de la cobertura forestal, la textura del suelo y las condiciones climáticas promedio de precipitación, temperatura y evapotranspiración, la infiltración promedio de agua de lluvia fue de 3 080, 2 935 y 1 821 m³ ha-1 para las microcuencas La Campana, Santa Rosa y Corralitos. El cálculo de los caudales registró un flujo promedio de 2 527 L s-1, de los cuales fluyeron 1 058 L s-1 en los arroyos Salto Seco, La Campana y Betania; 1 283 L s-1 en río Santa Rosa y 186 L s-1 en el arroyo Corralitos. El estudio contribuirá al conocimiento del régimen hídrico de los arroyos que genera parcialmente la sierra, y precisará las recomendaciones para la gestión sobre el buen manejo y uso del recurso tanto para la autoridad administrativa y funcionarios públicos, como para los usuarios del área natural y habitantes de Tecolotlán. | In order to determine the infiltration capacity and the natural flow of the streams that nourish Tecolotlán town in Jalisco state with potable water, the maximum runoff of five brooks located in three microbasins of the central part and southwest Sierra de Quila from May 2012 to May 2013 with the Speed-Section Method were studied. For infiltration and the analysis of the annual mean runoff volume, the Runoff-Precipitation indirect method was used according to the NOM-011-CNA-2000. Seven sites were established to calculate flows and two more over the water sources that provide it to the deposits of Tecolotlán. Considering forest cover density, soil texture and the average climate conditions of precipitation, temperature and evapotranspiration, the average rain water infiltration was 3 080, 2 935 and 1 821 m³ ha-1 for the La Campana, Santa Rosa and Corralitos microbasins. The determination of flows registered an average flow of 2 527 L s-1, of which 1 058 L s-1 flowed in the Salto Seco, La Campana and Betania streams; 1 283 L s-1 in Santa Rosa river, 186 L s-1 in Corralitos streams. The study will help to know the water regime of the streams that partially originates in the mountain range and will precise the recommendations for the good management and use of this resource for the administrative actors and public managers as well as for the users of the natural area and inhabitants of Tecolotlán.
Show more [+] Less [-]Desempenho de tilápias do Nilo criadas em diferentes densidades e com probióticos na água. Full text
2014
BARBOSA, I. C. B. | DIAS, L. T. S. | MACHADO, M. C. P. | HERMES, L. C. | SILVA, J. D. T. | DONADON, V.