Development of a microclimate model for prediction of temperatures inside a naturally ventilated greenhouse under cucumber crop in soilless media

Singh, Mahesh Chand; Singh, Jagdish P.; Singh, Kuldeep

doi:10.1016/j.compag.2018.08.044

Cited by 65 publications

(22 citation statements)

References 72 publications

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“…Consideration of Figure 4 and Table 3 reveals the strong connection between higher leaf-air temperature differences and transpiration rate, which were observed for plants within the fan ventilation greenhouse compartment. The average leaf temperature values obtained were similar for soilless cucumber in a naturally ventilated greenhouse and in the range for optimal plant growth and development [41,42]. As expected, the lower transpiration rates, which were observed in the fan pad evaporative cooling compartment, were associated with a higher amount of nutrient outflow from the greenhouse to the environment (i.e., drainage).…”

Section: Discussionsupporting

confidence: 64%

Effects of Cooling Systems on Greenhouse Microclimate and Cucumber Growth under Mediterranean Climatic Conditions

et al. 2019

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Two experiments were conducted in different cropping seasons under Mediterranean climatic conditions to investigate the impact of two cooling systems (fan-pad evaporative as opposed to fan ventilation) on greenhouse microclimate and soilless cucumber growth. The second objective of the experiment was to determine the most appropriate irrigation regime (between 0.24 and 0.32 L m−2) in relation to crop water uptake and greenhouse fertigation effluents. The use of a fan ventilation system enhanced the vapor pressure deficit; thus, the crop transpiration improved by 60% in relation to the transpiration rates of plants grown under the fan-pad system. Higher transpiration rates alleviated the heat load as the external–inside greenhouse air differences declined from 6.2 °C to 3 °C. The leaf–air temperature differential indicated that plants were not facing any water stress conditions for both cooling systems tested; however, fan ventilation reduced drainage emissions outflows (95% decrease) compared with evaporative cooling. Results also demonstrated that an irrigation regime of 0.24 L m−2 can be applied successfully in soilless cucumber crops, keeping the drainage to a minimum (20% of the nutrient solution supply). These results suggest that fan ventilation cooling system in conjugation with an appropriate irrigation regime prevents overheating and minimizes the nutrient and water losses in spring-grown soilless cucumber crops in Mediterranean greenhouses without compromising yield.

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Section: Discussionsupporting

confidence: 64%

Effects of Cooling Systems on Greenhouse Microclimate and Cucumber Growth under Mediterranean Climatic Conditions

et al. 2019

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“…A passive greenhouse is an agricultural construction with a translucent roof, where solar radiation is used to generate a favorable microclimate for plant growth and development (Choab et al, 2019). A microclimate is understood to be a series of climatic parameters that are formed in the environment near a plant and are generated from a series of relationships involving heat and mass transfer, this microclimate has a direct relationship with the metabolic activities of the plant and therefore in the final crop yields (Singh et al, 2018;Villagran Munar et al, 2018). The implementation of a greenhouse additionally seeks to provide crop protection from biotic and abiotic factors, which promotes an increase in the quantity and quality of the final product harvested compared to open field production .…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of the thermal and hygrometric behavior of a Colombian greenhouse used for the production of roses (Rosa spp.)

Villagrán

Bojacá²

2020

Ornam. Hortic.

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The spatial behavior of the environmental variables involved in rose production is one of the factors of greatest current interest in the Colombian ornamental sector. The aim of this work consisted in the evaluation of a passive greenhouse through an experimental approach that included the capture and recording of data through a grid of 40 sensors homogeneously distributed inside the greenhouse. The data processing was carried out through the application of geostatistical techniques that allowed to obtain contour plots for 5 levels of radiation intensity. The results of the exploratory analysis showed that the behavior of temperature, relative humidity and vapour pressure deficit are not the most suitable for rose production, mainly for the conditions of the night period where the temperature exhibited values below 12.5 °C, the relative humidity was above 90% and the vapour pressure deficit was below 0.1 kPa. On the other hand in the structural analysis the circular model of theoretical semivariogram was the one that better degree of adjustment presented in comparison with the experimental data finding that a strong spatial dependency exists for the studied variables, the prediction of the not sampled points was made by means of the method of ordinary kriging finding that horizontal gradients of temperature and relative humidity exist inside the greenhouse that increases in magnitude according to the level of radiation arriving to reach values of 6.1 °C and 30.4%.

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“…At the low level of IoT development, the environmental data were simply processed and usually presented in sheet and plot form [79,80]. Later, some studies collected huge amounts of data to set up various models based on plant growth or greenhouse climate [81,82,83], which contributed to predicting the crop yield and environment parameter changes to help farmers better manage greenhouse. CAI et al developed a low-cost smart greenhouse remote monitor system based on IoT.…”

Section: Iot Applications In Protected Agriculturementioning

confidence: 99%

State-of-the-Art Internet of Things in Protected Agriculture

Shi

Zhao

et al. 2019

Sensors

256

125

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The Internet of Things (IoT) has tremendous success in health care, smart city, industrial production and so on. Protected agriculture is one of the fields which has broad application prospects of IoT. Protected agriculture is a mode of highly efficient development of modern agriculture that uses artificial techniques to change climatic factors such as temperature, to create environmental conditions suitable for the growth of animals and plants. This review aims to gain insight into the state-of-the-art of IoT applications in protected agriculture and to identify the system structure and key technologies. Therefore, we completed a systematic literature review of IoT research and deployments in protected agriculture over the past 10 years and evaluated the contributions made by different academicians and organizations. Selected references were clustered into three application domains corresponding to plant management, animal farming and food/agricultural product supply traceability. Furthermore, we discussed the challenges along with future research prospects, to help new researchers of this domain understand the current research progress of IoT in protected agriculture and to propose more novel and innovative ideas in the future.

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Development of a microclimate model for prediction of temperatures inside a naturally ventilated greenhouse under cucumber crop in soilless media

Cited by 65 publications

References 72 publications

Effects of Cooling Systems on Greenhouse Microclimate and Cucumber Growth under Mediterranean Climatic Conditions

Effects of Cooling Systems on Greenhouse Microclimate and Cucumber Growth under Mediterranean Climatic Conditions

Experimental evaluation of the thermal and hygrometric behavior of a Colombian greenhouse used for the production of roses (Rosa spp.)

State-of-the-Art Internet of Things in Protected Agriculture

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