Measurement of evapotranspiration rate in a single-span greenhouse using the energy-balance equation

Takakura, T.; Kubota, Chieri; Sase, Sadanori; Hayashi, Makio; Ishii, Masahisa; Takayama, Kotaro; Nishina, Hiroshige; Kurata, K.; Giacomelli, G. A.

doi:10.1016/j.biosystemseng.2008.12.004

Cited by 35 publications

(25 citation statements)

References 13 publications

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“…1a). It is much more compact than the one used for earlier experiments (Takakura et al, 2009). Moreover, it has a CO2 concentration sensor (CO2 engine K30; SenseAir AB, Sweden).…”

Section: Developed Instrumentmentioning

confidence: 99%

“…Using newly developed sensor units that were more compact and accurate than earlier units (Takakura et al, 2009), this study was conducted to estimate the net photosynthesis of a plant canopy in a practical greenhouse during plant cultivation. Net photosynthesis and the ventilation flow rate are two unknowns in this greenhouse system, with adequate growth of bitter gourd plants.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, it is measured using expensive devices such as a soil flux chamber (Li-Cor Inc.) and a rather complicated model such as the PenmanMonteith equation (Bontsema et al, 2011). A much simpler method that does not use the Penman-Monteith equation has also been reported (Takakura, 2008;Takakura et al, 2009). The present study uses simple and inexpensive sensors to estimate the net photosynthesis of the plant canopy in a greenhouse by solving two equations: one for CO2 balance and one for the water vapor balance.…”

Section: Introductionmentioning

confidence: 99%

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In Site Net Photosynthesis Measurement of a Plant Canopy in a Single-Span Greenhouse

Takakura

Sunagawa

Tamaki

et al. 2017

JAA

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Using newly developed sensor units that were more compact and accurate than earlier units (Takakura et al., 2009), this study was conducted to estimate the net photosynthesis of a plant canopy in a practical greenhouse during plant cultivation. Net photosynthesis and the ventilation flow rate are two unknowns in this greenhouse system, with adequate growth of bitter gourd plants. Environmental conditions related to evapotranspiration from the canopy and CO2 flux from the soil surface were measured respectively using the developed sensor units and a box-type CO2 concentration sensor. Heat flux from the soil was also measured. Two equations were solved: one for CO2 balance and one for water vapor balance. On-line monitoring of net photosynthesis is possible using simple and inexpensive sensors, but the obtained data of the canopy photosynthesis were scattered because of frequent changes in the ventilation amount. Furthermore, improved sensor units revealed that the evapotranspiration of the canopy was linearly related to net solar radiation in the greenhouse.

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“…1a). It is much more compact than the one used for earlier experiments (Takakura et al, 2009). Moreover, it has a CO2 concentration sensor (CO2 engine K30; SenseAir AB, Sweden).…”

Section: Developed Instrumentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In Site Net Photosynthesis Measurement of a Plant Canopy in a Single-Span Greenhouse

Takakura

Sunagawa

Tamaki

et al. 2017

JAA

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“…La ETc es la clave para mejorar el entorno de las plantas tanto en cielo abierto como bajo invernadero (Takakura et al, 2009) y se debe considerar que varía con la temperatura del aire y del suelo, porque el calor sensible almacenado en ellos es la fuente de energía usada en el cambio de estado del agua líquida a vapor (Rousseaux et al, 2009). La ETc se calcula por medio del producto entre el coeficiente del cultivo (Kc) y la evapotranspiración del cultivo de referencia (ETo) (Allen et al, 2006).…”

Section: Introductionunclassified

“…La ETc se calcula por medio del producto entre el coeficiente del cultivo (Kc) y la evapotranspiración del cultivo de referencia (ETo) (Allen et al, 2006). Para determinar la ETo existen varios métodos como el tanque evaporímetro clase A, ecuaciones empíricas que usan la información climática; el método FAO Penman-Monteith (Allen et al, 2006) que considera medidas directas para determinar balance de agua del suelo; lisímetros de pesada o de volumen (Borin et al, 2011) y métodos de balance de energía, determinando el calor sensible o la energía radiante que son un buen método para el control de riego en invernadero (Takakura et al, 2009) El cultivo de la Rosa se produce principalmente bajo invernadero, cuyo ciclo de un tallo floral es de 11 a 12 semanas. La mitad de este periodo es de crecimiento vegetativo y el otro reproductivo.…”

Section: Introductionunclassified

Uso eficiente del agua para el cultivo de rosa cv. Freedom bajo invernadero

Arévalo-H

Vélez

Camacho-Tamayo

2013

Rev. bras. eng. agríc. ambient.

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RESUMENDeterminar el requerimiento de agua y el momento adecuado de distribución, es un factor fundamental para el cultivo de flores. El objetivo del presente trabajo fue determinar el efecto de la aplicación de tres láminas de riego sobre el desarrollo y producción del cultivo de la Rosa cv. Freedom, bajo invernadero. El experimento se realizó con tres láminas de riego en un cultivo de rosa (Rosa spp.) cv. Freedom. Se analizó el crecimiento de los tallos florales, la vida en florero, la producción y la eficiencia en el uso del agua. Los tratamientos se basaron en tres niveles de evapotranspiración de cultivo (ETc) (70, 80 y 100%). Durante el estudio, el cultivo se mantuvo en producción constante. Se aplicaron 384,87, 254,25 y 218,97 m 3 correspondiente a 100, 80 e 70% de ETc respectivamente, significando un ahorro de agua de 14,0 y 21,8% en el 80 e 70% de ETc respectivamente. El coeficiente de cultivo (Kc) vario entre 0,58 y 1,65, con una media de 1,13. No se encontraron diferencias en la producción. Las curvas de crecimiento presentaron incremento continuo, con ajuste al modelo logístico. El 70% de ETc presentó la mayor eficiencia en el uso del agua, con 185 tallos m -3 . La conservación media de los tallos florales fue de 12 a 15 días. La mayor causa de pérdida fue la deshidratación, que inició en el día 11, comportamiento normal del tallo floral.Palabras-clave: evapotranspiración, curva de crecimiento, manejo del agua, riego deficitario Efficient use of water for rose crop cv. Freedom in greenhouse ABSTRACT To determine the water requirements and timing of distribution is a key factor for growing flowers. The aim of this study was to determine the effect of applying three levels of water on the development and yield of rose cv. Freedom, under greenhouse conditions. The experiment was conducted with three levels of water in rose crop (Rosa spp.) cv. Freedom. The analyzed variables were: growth of flowering stems, vase life, yield and efficiency in water use. The treatments were based on three levels of crop evapotranspiration (ETc) (70, 80 and 100%). During the study, the crop yield was constant. The volume of water applied was 384.87, 254.25 and 218.97 m 3 corresponding to ETc -100, 80 and 70%, respectively, meaning a water savings of 14.6 and 21.8% in the ETc -80 and 70%, respectively. The crop coefficient (Kc) varied between 0.58 and 1.65, with a mean value of 1.13. There were no differences in yield. The growth curves showed a continuous increase, adjusted to a logistic model. The treatment of ETc -70% had the highest efficiency in water use, with 185 stems m -3 . The mean conservation of flower stalks was 12 to 15 days. The major cause of elimination was dehydration, but this started on day 11, a normal behavior of the floral stem.

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Assessment of reference evapotranspiration estimation methods in controlled greenhouse conditions

2020

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Measurement of evapotranspiration rate in a single-span greenhouse using the energy-balance equation

Cited by 35 publications

References 13 publications

In Site Net Photosynthesis Measurement of a Plant Canopy in a Single-Span Greenhouse

In Site Net Photosynthesis Measurement of a Plant Canopy in a Single-Span Greenhouse

Uso eficiente del agua para el cultivo de rosa cv. Freedom bajo invernadero

Assessment of reference evapotranspiration estimation methods in controlled greenhouse conditions

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