Author: AMERICA BERENICE MORALES DIAZ

Dinámica de la composición de la solución del suelo en cultivos del occidente de México

WILLIAN ALFREDO NARVAEZ ORTIZ AMERICA BERENICE MORALES DIAZ ADALBERTO BENAVIDES MENDOZA MANUEL HUMBERTO REYES VALDÉS (2017)

El presente estudio es un acercamiento preliminar y descriptivo al fenómeno del comportamiento dinámico de la solución del suelo. El objetivo del trabajo fue el estudio de la composición de la solución del suelo a través del tiempo, para ayudar al entendimiento de la disponibilidad de los diferentes iones, así como su comportamiento individual y colectivo mediante análisis de correlación y de componentes principales (ACP). El trabajo consistió en realizar colectas de información mediante muestreos repetitivos de la solución en diferentes tipos de suelo en zonas de producción intensiva ubicadas en el occidente de México (Jalisco y Colima) para cinco cultivos (aguacate, arándano, fresa, papaya y pimiento). Las muestras de solución del suelo fueron recolectadas en intervalos de 15 días a través de todo el ciclo fenológico para los diferentes cultivos; a las muestras se les determino el contenido de nitratos (NO3 - ), potasio (K+ ), calcio (Ca2+), sodio (Na+ ), pH y conductividad eléctrica (CE). Los resultados de las correlaciones mostraron patrones similares con un comportamiento decreciente entre los diferentes iones versus el tiempo. Los vectores de carga obtenidos mediante el método del ACP mostraron similitud en su comportamiento en todos los cultivos a excepción del cultivo de fresa, no obstante la dinámica del componente principal para todos los cultivos fue similar mostrando variación concomitante a través del tiempo con una clara tendencia ascendente. Este resultado indica la factibilidad de modelar de forma multivariada el comportamiento dinámico de la solución del suelo.

The present study is a preliminary and descriptive approach to the phenomenon of the dynamic behavior of soil solution. The objective was to study the composition of the soil solution over time, to help the understanding of the availability of different ions, as well as their individual and collective behavior through correlation and principal component analysis (PCA). The work consisted in gathering information by repetitive sampling of the solution in different soil types under intensive production areas located in western Mexico (Jalisco and Colima) for five crops (avocado, cranberry, strawberry, papaya and pepper). The soil solution samples were collected every 15 days throughout the phenological cycle for the different crops; the samples were analyzed for nitrates (NO3 - ), potassium (K+ ), calcium (Ca2+), sodium (Na+ ) levels, pH and electrical conductivity (EC). The results of the correlations showed similar patterns with a decreasing behavior among different ions versus time. Loading vectors obtained by PCA showed similarity in their behavior in all crops except strawberry; however the dynamics from the principal component for all crops was similar showing concomitant variation over time with an ascending trend. This result indicates the feasibility to model in multivariate ways the dynamic behavior of the soil solution.

Article

componente principal dinámica nutrimental solución del suelo CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA

Determination of micronutrient uptake in greenhouse cucumber crop using a modeling approach

LINO JEREMÍAS RAMÍREZ PÉREZ AMERICA BERENICE MORALES DIAZ KARIM DE ALBA ROMENUS SUSANA GONZALEZ MORALES ADALBERTO BENAVIDES MENDOZA ANTONIO JUAREZ MALDONADO (2017)

"Control of micronutrients application in cucumber cultivation has great importance as they participate in many functions of metabolism. In addition, micronutrients application efficiency is fundamental to avoid periods of overconsumption or deficit in the crop. In order to determine the micronutrient uptake using a dynamic model, two cycles of Vitaly and Luxell cucumber crops were developed. During the development of the crop, micronutrients content (Fe, B, Mn, Cu and Zn) in the different organs of the cucumber plant was quantified. The model dynamically simulated the accumulation of biomass and micronutrients, using the climatic variables recorded inside the greenhouse as inputs. It was found that a decrease in the photosynthetically active radiation and in the temperature significantly diminishes the accumulation of biomass by cucumber plants. On the other hand, the results demonstrate that the model efficiently simulates both the accumulation of biomass and micronutrients uptake in cucumber crop. The indices used for the evaluation of efficiency showed values higher than 0.95. This dynamic model can be useful to define adequate strategies for the management of cucumber cultivation in greenhouses as well as the application of micronutrients."

Article

Mathematical modeling Cucumis sativus l Micronutrients uptake Simulation CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA