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Search Results: 1 - 10 of 49172 matches for " Mario Domingo Amador-Ramírez "
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Efecto del riego suplementario en la producción de biomasa y grano de frijol de temporal en Zacatecas, México
Acosta-Díaz, Efraín;Acosta-Gallegos, Jorge Alberto;Amador-Ramírez, Mario Domingo;Padilla-Ramírez, José Saúl;
Agricultura técnica en México , 2009,
Abstract: in the semiarid highlands of north-central mexico, the lack of water for agricultural production is an important problem, particularly since annually a depletion of two m in the water mirror of local wells is taking place and the water storage capacity in dams is limited. because of the above situation, the optimization of water resources through supplemental irrigation in critical stages of bean sown under rainfed conditions is important. the aim of the present research was to determine the effect of supplemental irrigation on shoot biomass accumulation and seed yield in two sets of improved cultivars with different seed type. two experiments were established at cezac experiment station in zacatecas, mexico in 2001; nine black-seeded cultivars were evaluated in one trial, and 14 seed colored cultivars in a second one. all cultivars are of the type iii indeterminate growth habit. two soil moisture levels were utilized: 1) rainfall plus supplemental irrigation and 2) natural rainfall conditions. the rainfall plus supplemental irrigation treatment consisted of maintaining the available soil moisture above 50% throughout the crop-growing season, which was achieved by rainfall plus two irrigations, one at pre- and the second at the flowering stages. the natural rainfall treatment depended only on the rainfall occurred during the growing season. in both experiments, average shoot biomass accumulation and seed yield of the rainfall plus supplemental irrigation were significantly higher (p<0.01) than those in the rainfall treatment. in general, black seeded cultivars, that were significantly later to mature (p<0.05), showed higher shoot dry weight and seed yield in response to the treatment rainfed+supplemental irrigation than the colored cultivars. there was a differential response of the cultivars to the moisture treatments; outstanding black seeded cultivars were negro zacatecas, negro ontiveros and negro z524 from the mesoamerican race, while among seed colored cultiva
Presencia de Circulifer tenellus Baker y Beet mild curly top virus en maleza durante el invierno en el centro norte de México Circulifer tenellus Baker and Beet mild curly top virus presence in weeds during the winter in north-central Mexico
Rodolfo Velásquez-Valle,Luis Roberto Reveles-Torres,Mario Domingo Amador-Ramírez,María Mercedes Medina-Aguilar
Revista mexicana de ciencias agrícolas , 2012,
Abstract: Una de las enfermedades más importantes del chile para secado en el norte centro de México es la denominada amarillamientos del chile. Existe poca información acerca de la interacción entre el vector (Circulifer tenellus Baker), el Beet mild curly top virus y la maleza durante el invierno en esta región, consecuentemente el objetivo del trabajo fue identificar maleza de invierno que sirve como refugio para el vector y hospedero del virus en esta región. Entre enero y marzo de 2011 se muestrearon 26 manchones de maleza en los estados de Aguascalientes y Zacatecas. Se capturaron adultos de C. tenellus en 69.2% de los manchones de maleza muestreados; la mayoría (75.5%) de los especímenes eran hembras. El Beet mild curly top fue identificado sólo 15.4% de los sitios de muestreo infectando especies de maleza como Eruca sativa, Reseda sp., Chenopodium sp. y Solanum rostratum L. One of the most important diseases of chili pepper for drying in the north-central Mexico is called yellowing of chili. There is little information about the interaction between the vector (Circulifer tenellus Baker), the Beet mild curly top virus and weeds during the winter in this region; therefore, the objective was to identify winter weeds that serve as are fuge for the vector and host of the virus in this region. Between January and March, 2011, 26 patches of weed were sampled in Aguascalientes and Zacatecas. Adult C. tenellus were captured in 69.2% of the weed sampled patches; most of the specimens were females (75.5%). Beet mild curly top was identified in only 15.4% of the sampling sites, infecting weed species suchas Eruca sativa, Reseda sp., Chenopodium sp. and Solanum rostratum L.
Adaptation traits in dry bean cultivars grown under drought stress
Acosta-Díaz, Efraín;Acosta-Gallegos, Jorge Alberto;Trejo-López, Carlos;Padilla-Ramírez, José Saúl;Amador-Ramírez, Mario Domingo;
Agricultura técnica en México , 2009,
Abstract: drought is the major constraint to common bean (phaseolus vulgaris l.) production in mexico. the objective of this study was to identify physiological and phenological traits related to drought adaptation in common bean. a field experiment was conducted under a rainout shelter at the valley of mexico experimental station near texcoco, state of mexico. eight common bean cultivars from different genetic races and growth cycle and contrasted drought response were tested under drought stress and non-stress. irrigation was withheld 55 days after sowing at the initiation of flowering, to induce the stressed treatment. starting at this day, six consecutive nondestructive samplings were conducted at noon every other day. in each sampling, leaf water potential, stomata conductance and co2 assimilation rate were determined. data on phenology were also recorded. at physiological maturity, seed yield and shoot biomass were measured. harvest index was calculated. all cultivars exhibited a tendency to escape drought effects throughout accelerated reproductive development. this response was of small magnitude in mesoamerican cultivars negro cotaxtla 91 and bat 477 (type iii) and significant in cultivars from the durango race such as pinto zapata, bayo madero and bayo criollo del llano. significant difference among cultivars for stomata control was observed with high sensitivity in bat 477 and seq 12, cultivars from the mesoamerican race and in ica palmar from nueva granada race. bred and distinct cultivars ica palmar (type i) and pinto villa (type iii) from durango race, displayed high photosynthetic rate and harvest index, traits or mechanisms directly related to seed yield under stress and non-stress conditions.
Biomasa y rendimiento de frijol tipo flor de junio bajo riego y sequía
Acosta-Díaz, Efraín;Amador-Ramírez, Mario Domingo;Padilla-Ramírez, José Saúl;Gómez-Delgado, J. Patrocinio;Valadez-Montoya, Heladio;
Agricultura técnica en México , 2007,
Abstract: in the state of zacatecas, mexico 200 thousand ha of dry bean flor de junio class are annually sown, and its yield average is 315 kg ha-1. this low yield is due to intermittent drought during the growing season. the objective was to determine the effect of different soil moisture levels on plant maturity, shoot and root dry weight per plant, root-shoot ratio and yield of four bean genotypes. in 2002, two trials were conducted; one under greenhouse conditions and the other in the field at the unidad de agronomía of the universidad autónoma de zacatecas. in the greenhouse four soil moisture levels in 3 kg pots were evaluated; one without drought and three from moderate to severe stress: a) irrigated (r), 100% of the evapotranspired water was restituted every 12 h during the cycle, b) moderate drought (sm), 75% of the volume of r was restituted, c) severe drought (ss), 50% of the volume of r was restituted and d) moderate drought during the vegetative stage and severe drought during the reproductive stage (smv+ssr). in the field, two treatments were tested: rainfed (s), depending on rainfall and rainfed plus supplemental irrigation (s+r), with rainfall, contribution and three irrigations as needed. the stress treatments affected negatively all traits in the genotypes in comparison with r and s+r treatments in greenhouse and field, respectively. in the greenhouse; in comparison to the control (r) the average reductions observed with the smv+ssr treatment were: seven days to mature, 26% in shoot dry weight, 44% in root dry weight and 53% in yield. the negative effects increased accordingly to the drought level applied, except for root-shoot ratio, which increased with the stress. under field conditions, the average reductions under the rainfed treatment (s) as compared to (s+r) were: 13 days for maturity, 34% in shoot dry weight and 48% in yield. on the basis of yield reduction, drought susceptibility index and geometric mean of yield, lines uaz fj 2 and uaz fj 3 resulte
Efecto de la sequía en la producción de biomasa y grano de frijol
Acosta-Díaz, Efraín;Hernández-Torres, Ismael;Rodríguez-Guerra, Raúl;Pedroza-Flores, Jesús;Amador-Ramírez, Mario D.;Padilla-Ramírez, José Saúl;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: intermittent drought is most limiting factor for bean production (phaseolus vulgaris l.) under seasonal conditions in mexico. aim of this work was to determine drought effect on biomass accumulation of sprout and grain yield in creole and introduced seasonal bean varieties. two experiments were set, one with 21 native varieties and another with 15 introduced varieties, from different uncertain type growth habit, at academic unit la asención from agronomy school of universidad autónoma de nuevo león, mexico in 2009. experiments were done under two treatments of soil humidity: irrigation during whole cycle and drought. in irrigation treatment soil was kept above 60% of serviceable humidity during cultivation cycle, by precipitation and four irrigation aids (two before and other two after flowering), while in treatment of drought irrigation was suspended when flowering started. in both experiments, under drought condition biomass accumulation of sprout and grain yield was significantly lower (p≤ 0.01) than in irrigation treatment. in general, effect of drought treatment on sprout's dry weight was greater in native varieties, while effect on grain yield was greater in introduced varieties. in drought, varieties with higher yield were: native, pinto-2, pinto-1, amarillo mantequilla, boleado, bayo blanco, canelo and quipincillo rojo-1; and introduced, peruano, flor de mayo media oreja, pinto-5 and ojo de cabra. in accordance with drought susceptibility index and geometric average, most efficient varieties for production of grain yield under both humidity conditions were: pinto-2, amarillo mantequilla, pinto-1, boleado, peruano, flor de mayo media oreja, pinto-5 and ojo de cabra; without exception, all these varieties were collected in test region, which demonstrates importance of local adaptation under drought conditions.
Relación entre índice de área foliar y rendimiento en frijol bajo condiciones de secano
Acosta Díaz, Efraín;Acosta Gallegos, Jorge Alberto;Amador Ramírez, Mario Domingo;Padilla Ramírez, José Saúl;
Agricultura técnica en México , 2008,
Abstract: the leaves of the bean plant are one of the organs more affected by intermittent drought stress. the objective of this research was to determine the relationship between the leaf area index and seed yield at four phenological stages in dry bean cultivars of different grain type grown under rainfed conditions. the study was conducted in the main three producing areas in the state of zacatecas, mexico, during the summer of 2002 at six locations: four in the northwestern area, sown with a cv. negro san luis type; one in the central region, with a cv. of the flor de junio type and one in the southeastern region, with a cv. of the flor de mayo type. in each location, eight fields were chosen and in each two rows of 5 m longitude with four replications. four leaf area index samplings were made at four phenological stages: at the beginning of flowering, beginning of pod formation, beginning seed filling, and intermediate seed filling. seed yield was determined at physiological maturity. the relationship between the leaf area index at different stages and seed yield was determined by simple correlations. in general, average leaf area index increased with the development of the phenological stages, the highest values were observed at the beginning of the seed filling stage. average seed yield varied among locations: 130 g m-2 at the northwestern region with cv. negro san luis type, 139 g m-2 at central with cv. flor de junio type and 95 g m-2 at southwestern with cv. flor de mayo type.
Impacto económico, social y ambiental del manejo integral de huertos de durazno en Zacatecas
Sánchez Toledano, Blanca Isabel;Amador Ramírez, Mario Domingo;Rumayor Rodríguez, Agustín Fernando;Reveles Torres, Luis Roberto;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: assessing the impacts of technologies generated by agricultural research is an important issue for inifap. initially, this assessment was referred almost exclusively to economic impacts, but in recent times social and environmental dimensions have been incorporated, as a result of concerns about the sustainability of production systems. in 2009, we conducted a series of surveys to the cooperating producers who participated in a technology transfer project for peach, where primary information was gathered on the economic, social and environmental impact on model gardens, promoted for 6 years in a technology transfer project. in addition, a specialized software was used to estimate the economic benefit to society of investment in the project, assuming the adoption of the technology in an area of 5 hectares, and expecting an average yield of 12 tons per hectare. the estimation of the economic return of the research was carried out by calculating the indicators of convenience; in this case tir was estimated at 63.69%, a van of $ 23.5 million pesos and a benefit /cost ratio of 7.02, which means that for every peso invested in the generation and dissemination of this practice, the country made a $7 profit.
Impacto económico, social y ambiental del manejo integral de huertos de durazno en Zacatecas Economic, social and environmental impact of the integral management of peach orchards in Zacatecas
Blanca Isabel Sánchez Toledano,Mario Domingo Amador Ramírez,Agustín Fernando Rumayor Rodríguez,Luis Roberto Reveles Torres
Revista mexicana de ciencias agrícolas , 2012,
Abstract: La evaluación de los impactos derivados de las tecnologías generadas por la investigación agropecuaria es un tema importante para el INIFAP. Inicialmente, esta evaluación estaba referida casi en forma exclusiva a los impactos económicos; sin embargo, en estos últimos tiempos se han incorporado las dimensiones social y ambiental, en consecuencia de la preocupación por la sostenibilidad de los sistemas de producción. En 2009, se aplicó una serie de encuestas a los productores cooperantes, participantes de un proyecto de transferencia tecnológica en durazno, donde se recabó información primaria sobre el impacto económico, social y ambiental en huertos modelo promovido a través de 6 a os en un proyecto de transferencia tecnológica. Por otro lado, se utilizó un software especializado para estimar el beneficio económico a la sociedad de la inversión realizada en el proyecto, asumiendo la adopción de la tecnología en una superficie de 5 mil hectáreas y esperando un rendimiento promedio de 12 toneladas por hectárea. La estimación del retorno económico de la investigación se realizó a través del cálculo de indicadores de conveniencia, en este caso se estimó una TIR de 63.69%, un VAN de $23.5 millones de pesos y una relación beneficio/costo de 7.02, esto significa que por cada peso invertido en la generación y difusión de esta práctica, el país obtuvo $7 en beneficio económico. Assessing the impacts of technologies generated by agricultural research is an important issue for INIFAP. Initially, this assessment was referred almost exclusively to economic impacts, but in recent times social and environmental dimensions have been incorporated, as a result of concerns about the sustainability of production systems. In 2009, we conducted a series of surveys to the cooperating producers who participated in a technology transfer project for peach, where primary information was gathered on the economic, social and environmental impact on model gardens, promoted for 6 years in a technology transfer project. In addition, a specialized software was used to estimate the economic benefit to society of investment in the project, assuming the adoption of the technology in an area of 5 hectares, and expecting an average yield of 12 tons per hectare. The estimation of the economic return of the research was carried out by calculating the indicators of convenience; in this case TIR was estimated at 63.69%, a VAN of $ 23.5 million pesos and a benefit /cost ratio of 7.02, which means that for every peso invested in the generation and dissemination of this practice, the country made a
Diabetes autoinmune del adulto en diabéticos tipo 2: frecuencia y características
Cabrera-Rode,Eduardo; Perich Amador,Pedro; Díaz Horta,Oscar; Molina Matos,Gisela; Suárez Fonseca,Leonel; Tiberti,Claudio; Arranz Calzado,Celeste; Licea Puig,Manuel; Puig Domingo,Manuel; de Leiva,Alberto; Di Mario,Umberto;
Revista Cubana de Endocrinolog?-a , 2001,
Abstract: this paper was aimed at knowing the frequency, clinico-biochemical, immunologic and genetic characteristics of autoimmune diabetes in adults (lada) in 1 000 type 2 diabetic patients aged 35 or over with different times of duration of diabetes. glycemia, anti-pancreatic islet cell antibodies (ica), anti-gad65 antibodies, anti-ica512bdc/ia2 antibodies, anti-microsomal thyroid antibodies (amt), anti-gastric parietal antibodies (agp), antinuclear antibodies (an), microalbuminuria and peptide c during fasting were determined. these patients were surveyed and some clinical characteristics were registered. they were divided into 2 groups according to the presence of ica. all the type 2 + diabetics for anti-islet cell autoantibodies (ica and/or antigad65) were identified as lada. 3.4 % of type 2 ica + were detected. 22.0 % of type 2 ica - diabetics had anti-gad65 antibodies. it was found that type 2 ica + diabetics were younger, that their diabetes was shorter, that they had lower bmi, reduced levels of fasting peptide c, less dm2 history family (parents), lower values of diastolic and systolic arterial pressure, higher presence of anti-gad65 antibodies, amt and agp in comparison with type 2 ica - diabetics. it was observed that type 2 ica+ diabetics (lada) have specific characteristics that make them similar to type 1 diabetics, which would lead to important variations in their treatment and evolution as regards type 2 ica - diabetics. among the cuban type 2 diabetics it was detected a low frequency of ica and a high frequency of gad, which were different to those found in the caucasian populations. the anti-gad65 antibodies were higher than ica to detect lada. the clinical and immunological characteristics of these patients show the slow progression of the autoimmune destruction of b-cells with therapeutic implications.
La comprensión infantil de ciencia, arte, religión y deporte como instituciones sociales
Domingo Campos-Ramírez
Actualidades en Psicología , 2006,
Abstract: Un grupo de 8 ni os y 8 ni as, cuyas edades oscilan entre los 8 y los 14 a os de edad, fueron entrevistados en torno a sus ideas sobre la ciencia, el arte, la religión y el deporte. Utilizando un modelo de entrevista clínica, se indagó sobre el conjunto de categorías y conceptos que los ni os de la muestra utilizan para dar cuenta de la función social de dichas instituciones. Se reportan los núcleos temáticos y los principales conceptos y categorías contenidas en las respuestas de los entrevistados, diferenciándolos por sus grados de integración y complejidad.
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