Javier Giovanni Alvarez-Herrera

Pedagogical and Technological University of Colombia | UPTC · Facultad de Ciencias Agropecuarias

Propiedades físicas de un suelo sometido a la aplicación de diferentes cantidades de materia orgánica de escarabajo Physical properties of soil submitted to the implementation of different amounts of beetle organic matter

Las áreas con suelos degradados en el mundo son cada vez mayores y ponen en peligro la seguridad alimentaria, los ecosistemas y la sostenibilidad; no obstante, una herramienta para controlar esta pérdida de suelo es la adición de materia orgánica (MO). Existen diversas fuentes de materia orgánica, una de ellas, proviene del abono orgánico de escara...

Calcium (Ca) plays a crucial role as a nutrient influencing the ripening, post-harvest duration, and quality of fruits. Its impact on the cell wall and its function as a secondary messenger at the cellular level underscore its significance. While recently there has been an increase in studies examining the effects of Ca on fruit quality, there rema...

The cape gooseberry is an Andean fruit with significant nutritional and export potential in various international markets. The climacteric metabolism in cape gooseberry fruits results in a short post-harvest life, posing a threat to the commercialization of the fruits. Therefore, techniques are being explored to prolong the quality of the fruit. Hy...

The Japanese plum tree is of great importance in the productive development of Colombian fruit growers due to its nutritional contribution to human health, its great adaptability in the tropical highlands, and its good yields. This review presents the current investigative state of physiology of this plant and its management in tropical highlands,...

The cultivation of cape gooseberry in Colombia has increased in recent years, both in terms of export volume and production; however, yield has decreased by 19%. Therefore, it is necessary to evaluate major factors that affect fruit production and postharvest behavior such as irrigation and calcium fertilization. A design with three randomized bloc...

La arracacha es considerada un alimento ancestral con gran importancia para la seguridad alimentaria mundial. Sin embargo, la falta de conocimientos técnicos en cuanto al manejo fitosanitario de las semillas ha conllevado al deterioro de este cultivo, lo que genera en la actualidad una reducción en los rendimientos y poca presencia en los mercados....

El clavel tiene gran importancia para la floricultura colombiana, siendo Dianthus barbatus, en sus variedades Kiwi Mellow y Green Ball, una alternativa de crecimiento del sector, debido a la belleza que aporta a los arreglos florales. No obstante, las empresas colombianas necesitan innovar y optimizar recursos para llevar un manejo adecuado del esp...

In recent years, Colombia has seen an increase in the demand for peach fruits, but despite having adequate areas for peach production, neither production nor quality has increased because these fruits have a short post-harvest life and low firmness, which makes them susceptible to manipulation. The nutritional element Silicon affects the quality of...

Contextualization: Climatic conditions are determining factors of fruits quality at the time of harvesting and are defined by the physicochemical and physiological characteristics of the fruit. Knowledge gap: knowing the relationship between different variables that can affect the production of the Horvin plum variety. Purpose: To observe the effec...

La arracacha es una raíz andina con un alto contenido de almidón y constituye una fuente alternativa de seguridad alimentaria. En Colombia, la producción de este cultivo ha aumentado debido a la implementación de diversos materiales genéticos con fines comerciales en las diferentes regiones del país, sin embargo, debido a la forma de propagación se...

Feijoa is a promising crop in Colombia with high export potential. However, its postharvest shelf-life is short since it is a climacteric fruit with high respiration rates and susceptibility to fruit flies. Techniques such as refrigeration and the use of 1-methylcyclopropene (1-MCP) increase the post-harvest period and prolong fruit quality. The ob...

La gulupa es uno de los frutos que ha aumentado sus exportaciones desde Colombia en los últimos 15 años, debido a sus características organolépticas. Conocer el área foliar (AF) en este cultivo es importante; sin embargo, no se conocen métodos prácticos que permitan su cálculo. El objetivo fue desarrollar modelos no destructivos para estimar el AF...

Colombia es el segundo mayor exportador de flores del mundo; de estas, la especie más producida es la rosa, debido a su gran calidad en el mercado internacional. No obstante, en los últimos años se ha implementado la siembra en sustratos en los cultivos de flores, lo cual reduce la capacidad buffer del suelo y provoca deficiencias de nutrimentos, c...

Contextualización: La arveja es una leguminosa con un alto potencial nutricional debido a que es fuente de proteína y se cultiva ampliamente en todo el mundo. Vació de investigación: A pesar de que el porcentaje de germinación de las semillas de arveja es alto, esta germinación es poco uniforme, debido a que la mayoría de las leguminosas tienen div...

Arrayana' mandarin is one of the most cultivated citrus species in Colombia, but this fruit has a short postharvest life and is sensitive to chilling injury (CI) during cold storage. Generating strategies that decrease CI to mandarin can reduce quantitative and qualitative losses postharvest. Brassinosteroids (BR) have been used as a sustainable te...

‘Arrayana’ mandarin fruits have a short postharvest life and are sensitive to chilling injury (CI) during cold storage. Brassinosteroids (BR) have been used as a sustainable technology to alleviate CI in fruits and improve postharvest quality. This study evaluated the effect of applying the 24-epibrasinolide analogue (EBR), at doses of 5 mg L-1; DI...

Lettuce is part of the group of leafy vegetables that sees high consumption worldwide. However, population increases have forced excessive increases in fertilization, raising N levels both in the water and the soil and leading to serious environmental problems. As a result, appropriate fertilization management must be carried out; therefore, this s...

La pitahaya amarilla es susceptible a los daños mecánicos durante la vida en anaquel, lo que genera pérdidas económicas considerables, las cuales se pueden mitigar a través de la aplicación de ceras. Por lo anterior, se evaluó el efecto de recubrimientos comestibles en la calidad poscosecha de frutos de pitahaya amarilla con el fin de mantener la c...

The ‘Anna’ apple is a variety of low requirements of winter chill (250 to 300 chilling hours ≤7.2°C). This apple has essential health benefits and remarkable adaptive potential in tropical and subtropical areas affected by climate change. Thus, this review presents the significance of the ‘Anna’ apple cultivation, the phenological and eco-physiolog...

La producción de arándanos ha aumentado en Colombia debido a las condiciones ambientales que facilitan su producción especialmente en las zonas de altitud mayor a 2.000 m. Los frutos de arándanos son altamente perecederos y muchas empresas productoras no poseen sistemas de refrigeración, por lo que la aplicación de productos para aumentar su conser...

The lulo fruit has a high nutritional value and is widely used in agribusiness, however, the profitability of the crop has decreased due to its perishability, which generates losses in post-harvest. A completely randomized design with factorial arrangement was made, the first factor was the dose of 1-MCP (0,280 or 560 µg L-1) and the second, the st...

The demand for fruits with high anthocyanin content, such as blueberries, has increased in recent years due to their health benefits. However, few studies are known on the postharvest behavior of blueberry fruits subjected to the application of plant extracts and acibenzolar-S-methyl (ASM). The objective of this research was to investigate the effe...

Cape gooseberry fruits have positioned in the world market due to their excellent nutritional characteristics, because they are an ideal food that contributes to raising the defenses of the human body and helps it to face diseases such as COVID-19, they are also a natural source of antioxidants and anticancer agents. In order to avoid the physiopat...

El fruto del lulo posee un alto valor nutritivo y es de gran uso en la agroindustria, no obstante, la rentabilidad del cultivo ha disminuido debido a su perecibilidad, lo cual genera pérdidas en poscosecha. Se aplicó un diseño completamente al azar con arreglo factorial, el primer factor fue la dosis de 1-MCP (0, 280 o 560 µg L-1) y el segundo, la...

Contextualización: el lulo es un fruto promisorio de alta demanda en los mercados, debido a sus excelentes propiedades organolépticas, además de ser fuente importante de vitaminas y minerales. Vacío de conocimiento: en los últimos diez años se han desarrollado múltiples investigaciones sobre la ecofisiología de la planta de lulo, sin que exista u...

La arracacha está considerada dentro de un esquema de agricultura familiar como un cultivo fundamental para la seguridad alimentaria por su aporte energético. En Colombia existen una gran diversidad de cultivares que han sido poco estudiados. Por lo anterior, se caracterizó la calidad poscosecha y el contenido de almidón de siete cultivares de arra...

The global demand for avocados has grown in recent years. In Colombia, the Lorena variety is widely accepted in the market but the challenge for consumers is determining when the fruits should be consumed. However, there are no studies on this matter because most research is done on the Hass variety, which dominates global production. Therefore, th...

The objective of this review was to report on advances in environmental , cultural, and physiological aspects of fleshy fruit cracking that have reduced or avoided this disorder, which affects many fruit species. Cracking is a physiological disorder that limits the production and quality of fleshy fruits because it affects the exocarp and mesocarp,...

La utilización de elicitores es frecuente en la inducción de diferentes respuestas relacionadas con la resistencia sistémica de las plantas; no obstante, no se ha caracterizado el gasto metabólico que generan en el cultivo de papa variedad Diacol Capiro, que es la más utilizada para el procesamiento industrial en Colombia, debido a su calidad y alt...

Given the influence on the agricultural exploitation of the physical properties of soils, it is necessary to study its geo-statistics to know their distribution, variability, and their effect on the remaining soil properties. 80 points were measured in a transect of a farm belonging to the Universidad Pedagógica de Colombia. True density (Td), appa...

Plums are classified as a climacteric fruit with a high respiration rate between the end of their development and the start of the ripening process, thus making it necessary to apply techniques to preserve the organoleptic characteristics required for the product to have good market acceptance. The aim of this study was to evaluate the effect of ha...

Depletion of water resources, high water costs and increased demand require improvements in the efficient use of water. The objective of this experiment was to determine the effect of regulated deficit irrigation (RDI) on pear fruit quality (Pyrus communis cv Triunfo of Viena), which was compared to control irrigated plants at 100 % crop evapotrans...

La demanda de frutas exóticas, entre ellas la uchuva, se ha venido incrementando debido a sus excelentes propiedades nutricionales y sus altos contenidos de vitaminas A, B y C y de minerales como el calcio, el hierro y el fósforo, ideales para fortalecer el sistema inmunitario. Los frutos de la uchuva tienden a rajarse, por lo que debe suministrárs...

To determine whether the management of irrigation and nutrition in cape gooseberry crops with calcium to reduce the cracking of fruits affects the water potential of the plants, the present study was carried out using a randomized block design with 12 treatments in a 4×3 factorial arrangement. The blocks were the irrigation frequencies (4, 9 and 14...

La producción de hortalizas en sustratos se ha convertido en una gran alternativa. Por lo anterior, se evaluaron diferentes sustratos en un cultivo de lechuga en invernadero. Se utilizó un diseño en bloques completamente al azar (BCA) donde el factor de bloqueo fueron los sustratos y se establecieron tres tratamientos: T1: turba negra 30%, turba de...

Damping off is caused by Pythium sp. in seedlings, which is the main cause of losses in chrysanthemum crops. This research aimed to evaluate the optimal dose of biocontrollers and chemical fungicides for Pythium sp. The application of the treatments was carried out both in a laboratory and on a greenhouse crop. A completely randomized design was us...

Dentro de las enfermedades que se presentan en la producción de crisantemo a nivel mundial, una de las más importantes es la pudrición de raíz causada por Pythium sp. por lo anterior, se realizó una investigación cuyo objetivo fue evaluar la dosis óptima de biocontroladores y fungicidas químicos sobre Pythium sp. La aplicación de los tratamientos s...

Spinach is susceptible to drought conditions, and, because of climate change, it is necessary to optimize water application to crops. Therefore, a test was carried out in a completely randomized design (CRD) with four treatments consisting of the following irrigation suspension durations: T1: 0 d, T2: 4 d, T3: 7 d and T4: 10, with six replicates fo...

Because of the shallow root system of the onion plant, it requires irrigation at the proper time and intensity in order to promote the absorption of water and nutrients to obtain a high yield. We evaluated the irrigation rate effect on onion growth and development in a sandy loam soil with a sprinkler irrigation system. The experiment design was co...

El uso de técnicas geoestadísticas permite conocer lavariabilidad de las propiedades de los suelos y facilita la interpretación, la predicción y la toma de decisiones. Con el fin de establecer el impacto del manejo que se le ha dado a la granja Tunguavita, se realizó un transecto, en el cual, se tomaron 85 puntos de muestreo, que se encontraban en...

The use ofgeostatistical techniques allows to find the variability of soil properties and also facilitates interpretation, prediction and decision making. Therefore, in order to establish the impact of management that has been given to the farm Tunguavita, a transect was conducted in which 85 sample points were taken, located found in a wooded area...

The production of lettuce in hydroponic systems with a recirculating nutrient solution has been growing, so it is necessary to evaluate the growth and quality of production under this system. Two harvest cycles were evaluated, comparing the behavior of physiological variables and growth rates on lettuce plants in a hydroponic system with a plastic...

The application of fertilizers to rice crops constitutes a large percentage of productions costs, which in recent years have increased; therefore, it is necessary to implement alternatives that optimize the application and improve profitability. It was evaluated the effect of different doses and application times of a fertilizer with silicon on a r...

Soil is a dynamic system, with physical, chemical and biological properties that have high spatial variability, making necessary to use innovative methodologies to study this variability. The aim of this study was to determine the spatial variability of moisture and compaction in soils with different plant covers. The study was conducted in the dep...

La cebolla de bulbo es la segunda hortaliza más consumida en Colombia, siendo el departamento de Boyacá el principal productor en el país. El objetivo de la investigación fue evaluar el efecto de la aplicación de KNO3 y sacarosa en plantas de Allium cepa durante la fase de bulbificación. La investigación se desarrolló en Duitama, Boyacá, con el híb...

La uchuva es uno de los cultivos promisorios en las zonas del trópico alto, debido a las características nutricionales de su fruto; pero este es afectado por desórdenes de tipo fisiológico, entre estos, el rajado, que puede ocasionar hasta el 30 % de pérdidas poscosecha. El rajado se puede presentar por múltiples causas, de las cuales la mas destac...

The gooseberry is one of the exotic fruit species most important in Colombia. Calcium has been shown to be important for quality maintenance in fruits and vegetables, as it prevents a number of physiological disorders reinforce the cell walls and stabilize cellular membranes. With the aim to increase the fruit calcium concentration, a completely ra...

p>En el municipio de San Antonio del Tequendama (Cundinamarca, Colombia) se esta incentivando la siembra del cultivo de lulo, pero se desconocen muchos aspectos relacionados con la fisiologia y el manejo de la especie en estas condiciones agroecologicas. El objetivo fue realizar el estudio del crecimiento y desarrollo del fruto de lulo cultivar var...

En el municipio de Boyacá (departamento de Boyacá, Colombia), la producción de arracacha constituye una fuente de ingresos importante para los agricultores. Debido a la escasa información sobre el paquete tecnológico para este cultivo, se estudió el efecto de diferentes sistemas de labranza (labranza mínima, labranza convencional y labranza vertica...

Colombia is one of the leading producers of yellow dragon fruit, but exports of this fruit is low when compared to the domestic production because most do not meet the requirements of international markets in terms of quality and preservation. As a result, this study aimed to determine the effect of the application of 1-methylcyclopropene (1-MCP) o...

disminuyendo considerablemente su vida poscosecha. Teniendo en cuenta lo anterior se han desarrollado diferentes técnicas que permiten desacelerar los procesos normales de maduración, entre las que se encuentran, la modificación de atmósferas o el almacenamiento a diferentes temperaturas, siendo éste último, muy utilizado por la facilidad de manejo...

La uchuva es la fruta exótica más importante para Colombia y constituye un renglón de exportaciones importante, no obstante en los últimos años el rendimiento obtenido en el cultivo ha disminuido. Por lo anterior, es necesario evaluar factores que afecten la producción, como lo son el riego y la nutrición con calcio, para lo cual se empleó un diseñ...

The plum is a fruit prized for its nutraceutical properties because of its high content of fiber and sorbitol, which aid in digestion ; furthermore, it is characterized as containing antioxidant pigments and an antiseptic action with anthocyanins. These fruits are classified as climacteric and continue the process of respiration and ripening after...

Plantulas de tomate. Foto: Álvarez-Herrera. Comportamiento poscosecha de frutos de ciruela (Prunus salicina Lindl.) en cuatro estados de madurez tratados con etileno Effect of ethylene on postharvest behavior of plum fruits (Prunus salicina Lindl.) at four stages of maturity Estados de madurez en ciruela 'Horvin'. Foto: X. Rozo-Romero RESUMEN La ap...

The growth and development of cape gooseberry plants obtained from cuttings is affected by microorganisms in the substrate and by the concentration of plant growth regulators applied during planting .Using a factorial design, the effect of four concentrations of indole-3-butyric acid (IBA) (0, 800, 1,200, and 1,600 mg L-1) and four suspensions of T...

Plantulas de tomate. Foto: Álvarez-Herrera. Efecto de diferentes láminas de riego sobre la producción y calidad de fresa (Fragaria sp.) Effect of different irrigation water levels on the production and quality of the strawberry (Fragaria sp.) Fresa variedad Ventana en fructificación. Foto: Y.A. Deaquiz RESUMEN La fresa es un cultivo de gran importa...

The strawberry is a crop of great economic importance for many farmers in Colombia, mainly in the cold climatic zones of Boyacá and Cundinamarca; however, in these areas, the low level of technology in the production system and the lack of proper irrigation management in the strawberry cultivation lead to an inefficient use of water resources. Ther...

Plantulas de tomate. Foto: Álvarez-Herrera. Efecto de dos cepas de Trichoderma en el control de Botrytis cinerea y la calidad del fruto en fresa (Fragaria sp.) Effect of two Trichoderma strains on Botrytis cinerea control and fruit quality for the strawberry (Fragaria sp.) Planta de fresa var. Ventana. Foto: J.B. Merchán-Gaitán RESUMEN El moho gris...

The tamarillo, or tree tomato, produced in Colombia, has great potential for commercialization in the global market for tropical exotic fruits, but suffers quality losses during the postharvest phase due to the use of inappropriate technologies. In order to extend the postharvest life of these fruits, the effect of calcium chloride (CaCl2) and diff...

The gray mold caused by Botrytis cinerea is a limiting disease in strawberry and decreases the quality and commercial value of the fruit. Management of this disease is based on the use of chemical fungicides applied to the fruits. For this reason, the use of biocontrol organisms is an alternative for the control of this disease as they help to redu...

The pitahaya or dragon fruit is one of the most representative exotic fruits that Colombia has, with an important, growing international market, but the cultivation and postharvest of this fruit lack sufficient technological support to be more competitive. Therefore, alternatives that provide good-quality products that meet market requirements are...

The pitahaya or dragon fruit is one of the most representative exotic fruits that Colombia has, with an important, growing international market, but the cultivation and postharvest of this fruit lack sufficient technological support to be more competitive. Therefore, alternatives that provide good-quality products that meet market requirements are...

Plantulas de tomate. Foto: Álvarez-Herrera. Evaluación de goteros utilizados en microirrigación en Colombia Evaluation of micro-irrigation drippers used in Colombia Goteros turboline Foto: J.E. Vélez-Sánchez RESUMEN Desde el año 2010 y hasta el 2012 se realizó la evaluación de 23 tipos de emisores o goteros que se encuentran en el mercado colombian...

The cape gooseberry is the most promising exotic fruit exported from Colombia. Fruits of this species are susceptible to cracking, a disorder which is influenced by calcium applications and irrigation management, which can affect the nutraceutical properties of this fruit. The experiment was developed in a plastic greenhouse of the Faculty of Agron...

From 2010 to 2012, an assessment was carried out on twenty-three emitter or dripper types found in the Colombian market. The following were determined: the coefficient of variation (CV), the variation of the average flow rate compared to the nominal flow, the dimensions of the passages and the constituent parts, the pressure sensitivity, the type o...

RESUMEN Con el fin de implementar un manejo que ayude a mejorar la producción de fresas en zonas con bajos rendimientos, se evaluó el uso de reguladores de crecimiento, los cuales pueden tener influencia en el comportamiento poscosecha de los frutos. Se utilizaron plantas de fresa 'Albion' que recibieron aplicaciones de los siguientes reguladores:...

Los canales transportan el Ca, pero es este el que está involucrado en la transducción de señales. Su apertura resulta en una disminución de la concentración de calcio citoplasmático lo cual genera variaciones espaciales y temporales de este elemento dentro de la célula, y puede llegar a causar diversas respuestas fisiológicas a diferentes estímulo...

Calcium channels are primarily involved in signal transduction. Their opening results in increased cytoplasmic calcium concentration and the spatial and temporal variations of this element within the cell, which may eventually lead to different physiological responses to various biotic and abiotic events. Calcium-permeable channels have been report...