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| Registros recuperados: 755 | |
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| Leon Ttacca,Betsabe; Mendoza Coari,Paul Pascual; Palao Iturregui,Luis Alfredo. |
| Resumen Los cultivos de quinua en el altiplano peruano se ven afectados por la enfermedad de mildiu, que puede causar pérdidas de hasta el 90 % de la producción. El objetivo de este estudio es evaluar el efecto de cepas de Trichoderma sp. y microorganismos eficaces (ME) en el control del mildiu y rendimiento de la quinua. En el terreno experimental del Centro Internacional de la Papa (CIP), Camacani de la Universidad Nacional del Altiplano del departamento de Puno, en la campaña agrícola 2016-2017, se sembraron semillas control y otras paletizadas con ocho tratamientos: cuatro cepas de Trichoderma sp., tres dosis de ME (5 %, 10 % y 15 %) y una mezcla de las cepas de Trichoderma sp. y ME (15 %), posteriormente se realizaron cuatro aplicaciones foliares de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Patógeno; Control biológico; Chenopodium quinoa; Rendimiento; Microorganismos eficaces. |
| Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000400380 |
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| Quintero-García,Oscar Darío; Jaramillo-Villegas,Sonia. |
| Embriones inmaduros de cedro negro (Juglans neotropica) (Juglandaceae) con 16 y 20 semanas de desarrollo fueron removidos asépticamente de los frutos y sembrados durante 60 días en los medios de cultivo MS (Murashige y Skoog, 1962), WPM (Lloyd y McCown, 1980) y DKW (Driver y Kuniyuki, 1984), sin reguladores de crecimiento. Se observó que embriones con 16 semanas de desarrollo no germinaron en los tres medios de cultivo; por el contrario, los embriones con 20 semanas de desarrollo presentaron una germinación de 100%. Se encontró un marcado efecto del medio en el crecimiento de los embriones, siendo el medio MS mejor (P < 0.05) que los medios DKW y WPM, debido a que en él los embriones presentaron mayor altura y proporción tallo/raíz para la obtención de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cedro negro; Cultivo de embriones; Cultivo in vitro; Embriones vegetales; Germinación; Juglans neotropica; Medio de cultivo; Nogal; Rescate. |
| Ano: 2012 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122012000100007 |
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| Calero Quintero,David; Durán Castro,Carlos Vicente; Uribe Ceballos,José Reinel. |
| En el estudio se estimaron los niveles y las tendencias de la consanguinidad en variables de comportamiento durante la tienta y la lidia en dos ganaderías colombianas de reses bravas: Ernesto González Caicedo (EGC) - Popayán, Cauca, encaste Santacoloma; y Guachicono (GUA) - Bolívar, Cauca, Colombia, encaste Parladé. Se analizaron los pedigríes de 2.094 animales EGC nacidos entre 1918 y 2007 y 963 GUA, nacidos entre 1928 y 2005. Los coeficientes de consanguinidad de los bovinos se obtuvieron usando el Proc Inbreed del programa SAS v. 9.1.3. Se estudiaron además de las notas del ganadero, las variables propias y comunes a las faenas de tienta y de lidia. Los promedios y las desviaciones estándar de la consanguinidad en EGC y GUA fueron 4.9±6.6 y 4.2±4.2%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Consanguinidad; Pedigrí; Ganado de lidia; Encaste; Colombia. |
| Ano: 2010 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000200011 |
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| Zin Battisti,Luiz Fernando; Schmitt Filho,Abdon Luiz; Loss,Arcángelo; Sinisgalli,Paulo Antonio de Almeida. |
| Abstract The use of conservation managements such as the silvopastoral system, and the Voisin rational grazing system have been excellent alternatives to increase animal welfare and production efficiency and improve soil chemical attributes of degraded pastures. Therefore, the objective of this work was to evaluatethe effect of a High Biodiversity Silvopastoral System (SPSNUCLEUS) on the soil chemical attributes through comparisons with soils of a Intensive Grazing Management without trees (IGM), primary forest, and secondary forest areas. Total organic carbon, total nitrogen, pH, Al, H+Al, Ca, Mg, K, and P were evaluated after four years of implementation of SPSNUCLEUS. Soil samples from the layers 0-5, 5-10, 10-20, 20-30, and 30-40 cm were collected in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic carbon; Nitrogen; Tree component; Voisin rational grazing; Soil fertility. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000400486 |
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| Álvarez-Arteaga*,Gustavo; García-Fajardo,Belina; Orozco-Hernández,María Estela; Mireles-Lezama,Patricia; Contreras-Martínez,Julieta. |
| Abstract The loss of organic carbon stocks from the soil and their expulsion into the atmosphere due to the effect of anthropogenic activities must be understood as a problem that goes beyond the environmental to the social and economic context, with the soil degradation being just one of its many impacts. While the accumulation of carbon in the soil depends naturally on the interaction among a series of biotic and abiotic factors, management practices often cause the deterioration of its physical, chemical and biological properties, and, thus, increase the levels of mineralization and a reduction in carbon stocks. This research was undertaken in the municipality of San José del Rincón, State of Mexico, in volcanic soils under different conditions of soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stocks; Bulk density; Organic material; Management practices; Forest soils. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100021 |
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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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| Ramos-Calderón,Pablo Fernando; Rodríguez Peréz,Wilson; Castrillón Rivera,Beatriz; Ramos Rodríguez,Fredy; Suárez,Juan Carlos. |
| Abstract Cacao (Theobroma cacao L.) is a crop of globally importance on whose production around 20 million people depend directly. The crop is threatened due to the incidence of diseases caused by phytopathogenic fungi such as Moniliophthora roreri, causing losses of more than 80 % of the annual production. For this reason, in this study, a natural product such as the essential oil (EO) obtained from Siparuna guianensis was evaluated as a control alternative. The chemical composition of the EO, as well as the antifungal effect in vitro and in vivo on M. roreri, the causal agent of moniliasis frosty pod rot, were determined in the cacao pods located in a commercial plantation in southern Huila, Colombia. 28 compounds were detected, predominating:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; (D)-germacrene; (E)-nerolidol; Theobroma cacao L. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122022000200178 |
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| Registros recuperados: 755 | |
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