Microclimatic Evaluation of Five Types of Colombian Greenhouses Using Geostatistical Techniques

Abstract

In Colombia, the second-largest exporter of cut flowers worldwide and one of the South American countries with the largest area of crops under cover, passive or naturally ventilated greenhouses predominate. Locally, there are several types of greenhouses that differ in architecture, size, height, shape of roof and ventilation surfaces, of which many characteristics of the microclimate generated in their interior environment are unknown. This generates productive limitations that in some way may be limiting the yield, quality and health of the final products harvested; in addition, Colombian producers do not have the ability to monitor the microclimate of their farms, much less to correlate microclimate data with data on crop production and yield. Therefore, there is a need for the Colombian grower to know the most relevant microclimate characteristics generated in the main greenhouses used locally. The objective of this work was to carry out a microclimatic characterization of the five most used types of greenhouses in Colombia. The main results allowed determining that in these structures, there are conditions of high humidity and low vapor pressure for several hours of the day, which affects the physiological processes of growth and development of the plants. It was also identified that for each type of greenhouse, depending on the level of radiation, there is a significant microclimatic heterogeneity that may be the cause of the heterogeneity in plant growth, which is a common characteristic observed by the technical cultivation personnel. Therefore, it can be concluded that it is urgent to propose microclimatic optimization strategies to help ensure the sustainability of the most important production systems in the country.

CFD Model Verification and Aerodynamic Analysis in Large-Scaled Venlo Greenhouse for Tomato Cultivation

“…For the reference model, the average air velocity in both the greenhouse and plant domains was 0.654 m•s −1 (Figure 8). This value is close to 0.58 m•s −1 as reported by [30] in a 1 ha greenhouse with a tomato canopy. Generally, average greenhouse air velocities have been reported to range between 0 and 1.5 m•s −1 for the natural ventilation regime.…”

“…reported by [30] in a 1 ha greenhouse with a tomato canopy. Generally, average greenhouse air velocities have been reported to range between 0 and 1.5 m•s −1 for the natural ventilation regime.…”

“…Many studies have carried out the verification of the CFD model. Specifically for greenhouses, they are typically verified by comparing the quantitative and qualitative patterns of simulation model predictions with on-site measured environmental data, mainly the temperature [26,29,30]. However, previous models have mainly focused on small-scale greenhouses of less than 0.1 hectare, making them less suitable for developing design and control strategies for large-scale greenhouses and greenhouse complexes considering the internal microenvironment of greenhouses.…”

La técnica del cultivo sin suelo y su contribución al mejoramiento tecnológico de la agricultura bajo cubierta: Un análisis bibliométrico.

“…En Canadá y Estados Unidos el 95% de los tomates cultivados bajo invernadero son cultivados en SCS (Peet & Welles, 2005). Así mismo en la mayoría de estos países, que tienen condiciones de clima severas, predominan el uso de invernaderos de alta tecnología equipados con sistemas de climatización donde se pueden controlar todas las variables micro climáticas lo cual ayuda a maximizar la producción de los cultivos establecidos (Villagrán et al, 2022).…”

Análisis sobre la actividad científica referente a las estrategias de climatización pasiva usada en invernaderos: Parte 1: Análisis bibliométrico

“…Análisis sobre la actividad científica referente a las estrategias de climatización pasiva usada en invernaderos: Parte 1: Análisis bibliométrico Ciencia Latina Revista Científica Multidisciplinar, Ciudad de México, México. ISN 2707-2207/ISSN 2707-2215 (en línea),septiembre-octubre,2022,Volumen 6,Número 5 p 4600 En los países de la region tropical, predominan los invernaderos de cubierta plástica, esta tipología de estructuras no cuentan con sistemas de climatización y se ha demostrado que su comportamiento no es el adecuado para el crecimiento y desarrollo de las plantas (Villagrán et al, 2022;Villagrán & Rodriguez, 2021). De otro lado, algunos estudios han demostrado que los sistemas de climatización convencionales serian poco eficientes en esta tipología de estructuras, debido a perdidas energéticas por baja hermeticidad y por la baja capacidad del plástico para retener la radiación térmica (Villagrán-Munar & Bojacá-Aldana, 2019;Villagran, 2021).…”