Envíos recientes

Un acercamiento a la ecofisiología del cacao

Sáenz Cardona, Bernardo | 2003-09

In this paper, a biographical scetch, specially for Colombian growing areas, of the main aspects that determine the flowering, fruiting and vegetative development of Theobroma cacao ¡s made. Ecophysiologically the cacao tree is a species with heigh respose to hydroperiodic stress, of umbrophyllic nature during the first years of development, subsequently adapting to free exposition, due to autoshading of its canopy. The photosynthetically active radiation, with a good didtribution in the leaf strati, permits an efficient labor of the leaves near the diferenciation zones or floral cushions. Temperature not only affeets the vegetative growth, but also the regulation of fruit production during the year. Emphasis is made in the importance of maintaining the natural cover, product of fallen leaves, so its descomposition enriches with C02 the lower strati, where the leaves for fruit filling are concentrated.

Adsorción de plomo (II) en solución acuosa con tallos y hojas de Eichhornia crassipes

Vizcaíno Mendoza, Lissette | 2017-07

The presence of heavy metals such as lead (Pb+2) in water bodies causes alterations in environmental quality and public health due to their solubility and capacity of accumulation in the food chain. Problems that can be increased by the accumulation of Eichhornia crassipes an aquatic weed with high invasive capacity whose presence in the aquatic ecosystems favors the processes of eutrophication and growth of pathogenic microorganisms vectors of diseases. As an alternative for the removal of heavy metals and the use of TEC stems and HEC leaves of E. crassipes, the adsorption capacity and removal efficiency of Pb+2 in aqueous solution of this biomass were evaluated. Initially batch tests were performed to analyze the influence of the adsorbent dose, contact time and solution pH. As final disposal method, the calcination was analyzed at temperatures of 700 and 800°C. The equilibrium experimental data were correlated using the Langmuir and Freundlich models. The best fit model was the Langmuir model with R2=0.9816 TEC and R2=0.9854 HEC, achieving a maximum adsorption capacity of 172.41mg/g TEC and 131.58mg/g HEC with 0.2 g Of biomass/200mL, pH 5.5 and 3h of contact. Pb+2 removals above 97% were achieved in all tests. Calcination tests indicate that at temperatures ≥800°C it is possible to stabilize the residual biomass by preventing the removed metal cations from being released from the biological matrix by the effects of low pH leaching solutions.

Agroforestería en la U.D.C.A.

Carvajal Salcedo, Teresa | 1998-10

Análisis bromatológico en frutos de tomate (Lycopersicon Esculentum Mill) afectados por salinidad por nacl

Casierra Posada, Fánor | 2007-07

Salt stress is one of the most serious environmental problems limiting productivity of crop plants. Cropping system under greenhouse conditions causes osmotic problems to roots due to water and fertilizers supplied through fertirrigation, with a consequent salt accumulation around the root-zone. The aim of the present research was the evaluation of the effects of NaCl-salinity on some fruit quality characteristics of four tomato (Lycopersicon esculentum Mill) hybrids. The study was carried out under greenhouse conditions in Tunja/Colombia. Plantlets of hybrids Supermagnate F1, Marimba F1, Gloria F1 and Astona F1 growing on 3.5kg pots filled with soil were exposed to 40 or 8 mM NaCI. Control plants were untreated. These corresponded to electrical conductivities of 5.2 or 8.8 dS.m-1 respectively and 1.8dS.m-1 for controls. Pots were irrigated twice a week and the water excess was avoided. Results showed that percentage of protein, fibre, fat and carbohydrates were higher in fruits of NaCl-treated plants than in those of control plants, while ash and water contents were reduced by salinity. There were not statistical differences between the hybrids nor within the interaction hybrid x salinity.

Anti-oxidant activity of leaves and flowers extracts in chromolaena scabra plant species (L. f.) r.m. king & h. rob

Giraldo Villamil, Paula Alejandra | 2020

Chromolaena is a genus of phanerogamic plants belonging to the Asteraceae family. They are native to America, from the southern United States to South America (especially Brazil). The species, Chromolaena scabra (L.f.) R.M. King and H. Rob, is registered in Colombia and Ecuador. Objective: The objective of this research was to determine the antioxidant activity of the leaf and flower extracts of Chromolaena scabra. Methods: The antioxidant activity was evaluated by the ABTS*+ cationic radical scavenging method (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) and by the DPPH* radical scavenging test (radical method 1,1-diphenyl-2-picrylhydrazyl); Antioxidant activity tests were performed using Trolox's antioxidant capacity in the ABTS*+ free radical generator and its long-lasting radical scavenging capacity, which is based on the discoloration of the nitrogenous compound DPPH*. Results: The dichloromethane extract has a higher% of free radical uptake evaluated by the DPPH* method, likewise the ethanolic extract has the highest% of free radical uptake by ABTS*+ method; The evaluation of the flower and leaf extracts determined that the extract with the highest IC50 by both methods was ethanol. Conclusion: The antioxidant activity obtained by the DPPH* test was higher than that obtained by the ABTS*+ test, these values are significantly different, however, a good correlation was found between both methods, the results obtained in this study show that Chromolaena scabra has significant potential for use as a natural antioxidant agent.

Asignación y distribución de la materia seca en plantas cultivadas, con énfasis en especies leñosas

Cabezas Gutiérrez, Marco | 2006-01

En plantas cultivadas, las bases fisiológicas de la producción de materia seca dependen del concepto fuente-demanda, donde la fuente es la capacidad para fotosintetizar y la demanda es la capacidad potencia! para aprovechar los productos fotosintetizados. Si la demanda es pequeña, el rendimiento agronómico se puede ver afectado en cantidad, pero si ia demanda es grande, en número y en tamañ©r el rendimiento puede ser bajo si la actividad y el tamaño de la fuente son limitadas. Se han realizado varios estudios en plantas anuales y herbáceas, pero en plantas leñosas la información es poca, siendo más escasa en el caso de especies tropicales. En el presente artículo, se revisan los conceptos fundamentales de la economía del carbono en plantas cultivadas, con especial énfasis en especies leñosas de trópicos y subtrópicos, considerando los factores más determinantes para obtener los mejores resultados agronómicos. De forma complementaria, se propone un modelo para explicar la dinámica de los carbohidratos producto de la fotosíntesis en plantas perennifolias y se compara con el modelo propuesto por Grossman y De Jong para árboles caducifoHos.

Aspectos ecofisiológicos de la feijoa (Acca sellowiana Berg) bajo condiciones de riego y déficit hídrico

Peña Baracaldo, Fernando Javier | 2014-07

The research was carried out at Firavitoba, Boyacá, to determine the growth responses and the plant development under irrigation and drought condition. Feijoa plants, three years old, in good phytosanitary conditions and with similar size were used. Irrigation was applied with drip emitters 4L and 2 h-1 drippers / plant. A complete random block design was employed, with three blocks and 10 plants per plot. Within each block five treatments, corresponding to different irrigation levels 100% (control), 75%, 50%, 25% and 0% were randomly assigned. For each plant, four times, up to day 406 after treatment initiation, the number of new branches, of fully developed leaves and of floral buttons were counted directly. Height was measured from the root collar to the top of the plant; leaf area (cm2) was measured with a portable leaf area meter; the leaf area index (LAI) was calculated by the ratio of leaf area and the soil area occupied by the plant. The data obtained were subjected to analysis of variance (ANOVA) and mean comparison test of Tukey (5%). The software used was SAS Ve 9.2 (Cary, NC). It was determined that irrigation is essential for good physiological development of feijoa, specifically for the vegetative plant growth, specifically under 50 – 70 % irrigation levels.

Caracterización ambiental de un bosque andino nublado relictual y su relación con la densidad del recurso alimenticio disponible para agouti taczanowskii

Osbahr, Karin | 2004-07

During the loss of vegetation coverage as a consequence of antropic disturbance, changes are generated in the environmental conditions that can alter the plant com- position of the Andean forests. The plant species present differential responses to this changes, according to the level of tolerance they present. Therefore these variations were evaluated using as parameters the environmental and soil temperature, as well as the luminescence and humidity, in relation to the density of the feeding resource available for A. taczanowskii in an Andean forest with different degree of disturbance. The results show that the modification in the structure of the forest generates higher fluctuations in the analyzed abiotic factors in areas with less vegetation cover. The existence of the different families of plants consumed by A. taczanowskii \n areas of primary and secondary vegetation indicates that the registered microclimatic variations are according to the limits of tolerance for the evaluated plants, but on the whole they show an influence on the density with which they are represented in the plant community.

Caracterización morfoagronómica de la berenjena (Solanum melongena L.)

Aramendiz-Tatis, Hermes | 2009-07

El conocimiento de la diversidad genética presente en un banco de germoplasma es importante en el mejoramiento de plantas, porque permite identificar las combinaciones híbridas con mayor efecto heterótico y facilita la selección de segregantes transgresivos superiores en las poblaciones. El objetivo del trabajo consistió en estimar la divergencia genética entre 62 accesiones de Berenjena colectadas en el Caribe Colombiano, por la Universidad de Córdoba y Corpoica, mediante el uso de 21 caracteres morfoagronómicos. Los datos estuvieron constituidos por la moda de cada descriptor, de acuerdo a los criterios del IBPGR (1988). Se obtuvieron valores de similitud, discriminación de genotipos por el método de Cole Rodgers et al. (1997) y el de agrupación de pares no ponderados con medias aritméticas (UPGMA), utilizando el programa Genes (Cruz, 2006). Las características color del cotiledón, hábito de crecimiento de la planta, ancho de la hoja, lóbulos foliares, espinas en las hojas, pubescencia de la hoja, ancho del fruto y longitud del cáliz acusaron ausencia de variación y siete grupos fueron identificados, dos, de los cuales, integrados por un solo cultivar. Con base en el dendrograma y los descriptores utilizados los cultivares 48 y 56 son posibles duplicados.

Comportamiento del pompón (chrysanthemun morifolium ramat ) en confinamiento bajo cubierta, utilizando tres sustratos y sus mezclas

Soraya Reina, Viviam | 2002-11

Pompon crop in the Savanna of Bogotá is cultivated in a dynamic way due to the characteristics of the species and the different handling methods. However the strong pressure to díminish costs and at the same time increase productivity in covered areas makes it necessary to pursue methodologies that optimize the practices. With the purpose to determine the behavior of pompon (Chrysantemum morifolium) forconfinement, substrates as oasis, peat and burned husk, the mixture oasis-peat, peat-husk and husk-oasis were evaluated. The puré substrates were used as check. A total of 16 treatments were evaluated, maintained during 14 days in the rooting area with additional light. The checks were transplanted in the production area, while the others were put in the confinement area. Both groups received light for 16 additional nights. For each treatment the number of shafts per bunch, the number of bunches and the weight of each bunch, the days to cutting and the economic utility was evaluated. A random complete block design and for each effect of comparison of means the technique of orthogonal contrasts with a level of significance of 0,05% was used. In confinement, the substrate that presented the best agronomic behavior according to the evaluated variables, was a mixture of peat 30% and husk 70%.The duration of the productive cycle of the crop was not affected by the substrates used in the confined treatments. The highest economic utility was obtained with the non confined treatments using as substrate burned husk.

Crecimiento y desarrollo de albahaca (Ocimum basilicum L.) bajo cubierta en la Sabana de Bogotá

Colorado, Fernando | 2013-01

The development of basil can be established and quantified by obtaining growth parameters and the characterization of the developmental phases, useful information for its commercial and agricultural management. In this paper it was sought to obtain the TCR, the IAF and the TAN of the species, planted under cover, also to determine their stages of development. The research was conducted in the U.D.C.A between 2010 and 2011 in an area of 70m2 with the species Ocimum basilicumL. A population density of 12 plants per m2 was used. Height, number of leaves, leaf area and dry weight was measured. The counts were made every four days. The trial was carried up to the start of flowering: 61ddt. Growth parameters were determined using the functional approach of the logistic model with the SAS statistical package. From the analyzed information the physiological efficiency was determined. The development phases were characterized in the same period and were estimated by counting the days elapsed between plant physiological events or observable changes in the variables and determining the physiological efficiency per phase. Three phases of development were identified and growth rates were specified, obtaining maximum TCR values of 0.1082g g-1 d-1 at 5ddt; TAN of 0.0083g cm2 d-1 at the end of the 14ddt and IAF of 0.047 at 31ddt.

Curaduría e identificación de la fauna de Bombus de la colección de entomología de la universidad de ciencias aplicadas y ambientales U.D.C.A

Téllez Farfán, Lorena | 2013-07

Insect collections are tools for education, extension and research and require maintenance and curation in order to generate useful information contributing to the knowledge and conservation of the biodiversity of collected species. The objective of this study was to curate and identify the Bombus species deposited at U.D.C.A’s entomological collection. Eight species of Bombus were identified from six Colombian departments distributed in 55 localities around the slopes of the eastern and central range of the Andean mountains, at altitudes oscillating from 178 to 3000 meters above sea level. Twenty-five host plants were found visited by B. atratus, B. robustus y B. rubicundus. Among visited plants, the highest frequency of visits by B. atratus was recorded on blackberry and clover flowers. The Bombus collection was appraised at a curation level of nine (out of ten) and the material was used to publish scientific papers contributing to a better understanding and conservation of this group of native pollinators.

Deficiencies of phosphorus, calcium and magnesium affect the postharvest quality of cape gooseberry (physalis peruviana l.) fruits

Garzón Acosta, C.P. | 2014-01

Para analizar la calidad poscosecha de la uchuva, el segundo fruto de exportación de Colombia, frutos desarrollados bajo invernadero de plástico en plantas regadas con una solución nutritiva ausente en fósforo (P), magnesio (Mg) y calcio (Ca), comparado con el testigo (solución completa), fueron almacenados a 1°C (91% humedad relativa [HR]) o 19°C (68% HR) durante un tiempo de 30 días. En los frutos, empacados con cáliz a razón de 100 g por canastillas de plástico, recubiertas con papel vinipel, se realizaron pruebas químicas, físicas y sensoriales, cada 3 días. Al inicio del almacenamiento los frutos del testigo alcanzaron el mayor peso fresco y el rajado de los frutos fue mayor en los deficientes de Mg (11,30%), mucho más alto que en los deficientes de Ca (0,79%). Durante el almacenamiento los frutos deficientes en P mostraron las mayores pérdidas de peso fresco. Los frutos, almacenados a 19°C, presentaron los valores más altos de acidez total titulable (ATT), mientras los sólidos solubles totales (SST) fueron más bajos, comparado con los frutos mantenidos a 1°C. Debido a este comportamiento, la relación de madurez (SST/ATT) fue más alta en los frutos almacenados a la temperatura baja. En el panel sensorial, los frutos del testigo (19°C), resultaron mejores en apariencia y color, mientras que los almacenados a 1°C tuvieron mejor sabor. A esta temperatura baja y carente en Mg, los frutos presentaron buen aroma y sabor, pero los menos aceptados fueron los con deficiencia en P y Ca.

Determinacion de sintomas por deficiencia inducida de nutrimentos en uchuva (physa//s peruviana)

Cabezas Gutiérrez, Marco | 2002-09

In orderto establish and ¡dentify the main symptoms and visual manifestations of nutrient deficiencies of Physalis peruviana, an experiment under greenhouse conditions was carried out. An hidroponic technique was used, with vermiculite as Iike substrate and varied Hoagland's solution as nutrients, depending on the element evaluated. 15 treatments were compared: a control, without nutrients and a relative proof consisting in a complete solution; in each of remaining 13 treatments, one of the esential elements, N, P , K, Ca, Mg, S, Fe, Mn, Zn, Cu, B, Cl and Mo was elimínate. A random design, with four replicatioñs , and a 1 I capacity bag as experimental plot was employed. The variables plant heigth, number of reproductive structures/plant, fresh fruit weight, total soluble solids and pH were evaluated. Also, the biomass distribution in the plant was determined to finish. A photograffic sequence of deficienct symptoms was made, case to case. Plants treated with nitrogen deficient solution were more afected, and showed a similar condition as the control; growth and develonment problems were established, such as a no fruit production. The P and K deficiencies also affected the plant develonment and the final biomass quantity whit symptoms easy to identity under field conditions. Ca deficientcy induced apical fruit rot and lack of quality, disorder in leaf distribution of dry matter and speckled capsules. Boron was the microelement with the most negative influence when absent in the nutritive solution, showing atrophic growth inthe meristematic zones and fruit cracking at the ecuatorial plañe. It was not posible to visually establish clear deficiency symptoms of Mn, Mo and Cl.

Development of reversed-phase high performance liquid chromatography methods for quantification of two isomeric flavones and the application of the methods to pharmacokinetic studies in rats

L. Whitted, Crystal | 2015-09

Isomers 5,7-dihydroxy-3,6,8-trimethoxy-2-phenyl-4H-chromen-4-one (5,7–dihydroxy-3,6,8 trimethoxy flavone) (flavone A) and 3,5-dihydroxy-6,7,8-trimethoxy-2-phenyl-4H-chromen-4-one (3,5-dihydroxy-6,7,8-trimethoxy flavone) (flavone B) have recently demonstrated differential antineoplastic activities against pancreatic cancer in vitro. These studies also indicated that these compounds target highly tumorigenic cells while sparing normal cells. The in vivo antitumor activities of these flavones have not been determined, and detection protocols for these compounds are needed to conduct pre-clinical assays following intravenous dosing. Here, we report methods developed using acetonitrile to extract two flavone isomers and corresponding internal standards, celecoxib and diclofenac, from rat plasma. Separation was achieved using a Shimadzu liquid chromatography system with a C18 column and mobile phase acetonitrile/water (60:40 and 70:30 for flavones A and B, respectively) containing 0.2% acetic acid and 0.05% triethylamine at a flow rate of 0.4 mL/min and detection at 245 nm. Calibration curves ranging from 250 to 2500 ng/mL and 2500 to 100,000 ng/mL for both flavones were linear (r2 ≥ 0.99) with the lower limits of quantification being 250 ng/mL. Recovery of concentrations 250, 1000, 2500, 5000, and 100,000 ng/mL ranged from 87 to 116% and 84 to 103% (n = 3) for flavone A and B, respectively. Stability of both flavones after a freezing/thawing cycle yielded a mean peak ratio ≥0.92 when compared to freshly extracted samples. Intravenous administration of a 20 mg/kg dose in rats yielded half-lives of 83.68 ± 56.61 and 107.45 ± 53.31 min with clearance values of 12.99 ± 13.78 and 80.79 ± 35.06 mL/min/kg for flavones A and B, respectively.

Distribución vertical y daño de larvas de heliothis spp. En el algodonero.

Alvarez R., J. Alonso | 1999-01

Se estudió la distribución vertical y el daño causado por larvas del complejo Heliothis spp. en algodonero bajo jaula y condiciones de campo. Tres larvas recién nacidas se colocaron en el terminal principal de cada una de 18 plantas. El 95% de las larvas del primer instar permaneció en el sitio de infestación artificial. Durante el segundo instar el 75% de las larvas se encontró en el terminal principal, el 25% se desplazó. Más del 70% de las larvas del tercer instar se desplazó hacia abajo del terminal principal, El porcentaje de larvas desplazadas se incrementó a 95% para el cuarto instar. En promedio durante su vida una larva ocasionó daños en 4.23 botones y 3.73 cápsulas por planta.

Efecto de dos fitorreguladores sobre la formación de raíces en estacas de caña flecha (gynerium sagittatum aubl.)

Cardona Ayala, Carlos E. | 2005-07

“Caña flecha”, Gynerium sagittatum Aubl., plant which actually presents propagation problems, is an economically and socially important species for the handicraft industry of the indigenous Zenu community. In order to evalúate the effect of exogenous auxins on adventitious root formation of basal cuttings, a research was carried out in 2004, at the breeding station of the üniversity of Córdoba, Montería (Colombia). Plant material was selected from a plantation located in “Viajano” Sahagún, department of Córdoba. Three node cuts were taken from the lower third of the plants. The concentrations of the auxins, indolbutyric acid (IBA), naftalenacetic acid (NAA) and their mixture, IBA+NAA, used were 0, 2000, 4000, 6000 and 8000ppm. A complete randomized block design, comprising thirteen treatments with five replicates was employed. The variables evaluates were root number and length, dry root mass, percentage rooting, number of buds and leafs and foliage area. The results showed that a 2000ppm IBA concentraron produced the best response in all evaluated variables followed by the 2000 ppm combination of IBA + NAA. Treatments with NAA alone did not show any positive results due probably to phytotoxic effects on quiescent cells. The use of auxins was effective for propagation of this genetically eroded species.

Efecto de la aplicación exógena de la poli amina espermicida sobre de plántulas de mano de oso (oreopanax floribunda) y garrocho (virburnum sp.).

Novoa Wilches, Darling Lissep | 1999-07

La situación actual de los Bosques Andinos es inestable, debido al alto grado de destrucción. Aunque en los últimos años se han emprendido programas de reforestación, existen limitantes que impiden la propagación y producción de plantas adaptadas y adecuadas para el cumplimiento de los proyectos. Entre ellas figura el lento crecimiento en el estado de plántula, razón por la cual no se pueden incluir en estos programas. Tal es el caso del Mano de Oso Oreopanax floribunda y garrocho Viburnum sp. dos especies originarias de la cordillera oriental, ideales en zonas de recuperación de suelos y control de erosión. Con base a lo anterior se planteó evaluar el posible efecto de la poliamina espermidina (Spd) en el crecimiento vegetativo de plántulas de estas dos especies. El trabajo se realizó en el laboratorio de cultivos de tejidos vegetales “in vitro” a cargo de la Corporación Autónoma Regional, de Facatativa en el vivero 'TlSQüESüSA', utilizando plántulas de aproximadamente 12 meses de edad, a las cuales se aplicaron diferentes concentraciones de la poliamina espermidina. Los parámetros de crecimiento que se evaluaron fueron: altura, número de hojas, número y longitud de ramas, de cinco plantas marcadas al azar en cada tratamiento cada 15 días durante cuatro meses. Los datos así obtenidos fueron sometidos a análisis de varianza (AMAVA), y pruebas de comparación múltiple (prueba de Tukey). De esta investigación se pudo establecer que la aplicación exógena de Spm a plántulas de V. sp. tuvo un efecto positivo en el número de hojas, ramas y longitud de ramas, mientras que en O. floribunda a concentraciones de 100 um de Spd el efecto solo fue notorio en el número de hojas. En ninguna de las dos plantas se encontró respuesta en altura. Antes de recomendar el uso de Spd se deben realizar evaluaciones a más largo plazo utilizando otros tipos de poliaminas aplicadas a diferentes edades de las especies.

Efecto de la fertilización orgánica y mineral en rendimiento de lechuga (Lactuca sativa L.) en un suelo typic hapludalfs de mediana fertilidad

Lora Silva, Rodrigo | 2006-01

ln order to evalúate production and economic benefit of lettuce (Lactuca sativa L.), four doses of an organic fertilizer, three of the mineral fertilizer 25-4-24-2-1 and a check, an experiment was carried out at the Cajicá municipality (Cundinamarca), on a Typic Hapludalfs soil of médium fertility level and 2600mosl. A complete randomized blocks design with factorial arrangement 4 x 5 for 20 treatments and three replications of 12m2 with four rows of ten meters length and 30cm between them, was tested. Salinas variety Batavia type was used. The effective area was 80.000 plants/ha. The ieveis used were 0-200-400-600kg/ha of mineral fertilizer, and 0- 1500-3000-4500-6000kg/ha of organic fertilizer. After 30 days of germination the plants were transplanted and with an interval of eight days, five samples were taken to obtain the fresh weigh per plant in order to know the harvest time. The results indicated that 70 days after germination is an appropriate period for harvest. In total yields mineral fertilizer and its combination with organic fertilizer was better than organic fertilizer alone. The most favorable benefit cost analysis was 4.3 with 600kg/ha of mineral fertilizer mixed with 1.500kg/ha of organic fertilizer. With 600kg/ha of mineral fertilizer mixed with the organic fertilizer, and with 400kg/ha of mineral fertilizer mixed with 3000 and 6000kg/ha of organic fertilizer the best yield and price per plant was obtained.

Efecto de la mezcla de creolina, melaza y lejia sobre el cafeto y la calidad del grano

Zenner de Polanía, Ingeborg | 1999-07

Small coffee growers consider the existing recommendations for managing the coffee-berry borer to costly and revert to home remedies. Within these producís figures the mixture of creolin, molasses and lye, with unknown effects on the plant nutrition, the quality of the grinded coffee and the possible phytotoxicity. To determine these aspects, different proportions.in several application frequencies of the mixture were evaluated in a plot, plantes with the coffee vac Colombia. The methods employed were foliar analysis to know the ¡nfluence of the mixture on the nutritional State of the coffee plant; weekly evaluations of the phytotoxicity according to a visual scale of 0 to 3; benefit and processing of the harvest and quality evaluation by means of a survey. The results showed no marked influence of the components of the mixture on the nutritional State of the plant. In general an increased concentraron of calcium and magnesium, and a decrease in the boron content was detected. Although the content was considered adecúate, the treatments decreased the potassium concentration compared with the check, due possible to the effect of Ca and Mg. Nitrogen content was not affected; however the relationship of this nutrient with Ca, K and Mg was found disbalanced, compared to normal, aspect which could influence the yield. During the 17 weeks, the field experiment was carried out, no sympthoms of phytotoxicity were observed. The coffee plant foliage preserved its normal coloration, neither were flowers affected by the applications. The survey indicated that the applications of the mixture neither affected the grain quality ñor that of the beverage, being the samples evaluated between desirable and reduced quality. In no moment the tasters detected flavor or taste of phenol, active ingredient of creolin.