Measurement and estimation of plastic greenhouse reference evapotranspiration in a Mediterranean climate

Fernández, Manuel Ramírez; Bonachela, S.; Orgaz, F.; Thompson, R.B.; López, J.C.; Granados, M.R.; Gallardo, M.; Fereres, E.

doi:10.1007/s00271-010-0210-z

Cited by 157 publications

(99 citation statements)

References 34 publications

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“…The evaporative demand is lower inside the greenhouse than outside (open field) due to the decrease in solar radiation (20% on average) and the wind speed is nearly zero. The evaporative demand inside the greenhouse is 60 percent of that of outside and the same finding is reported by Möller and Assouline [34] Fernández et al [35]. They used lime suspension on greenhouse cover surface to cut down the entry of solar radiation to reduce air temperature that caused ETo reduction.…”

Section: Estimation Of Eto For Inside the Greenhouse And Open Fieldsupporting

confidence: 70%

“…Daily Rose plant ET C values varied from 1.43 to 4.99 mm day -1 and 1.86 to 5.28 mm day -1 for greenhouse and outside conditions respectively. Evapotranspiration (ETc) requirement of the plant in drum lysimeters in greenhouse is lower than the plant of drum lysimeters kept outside (open field) due to the reduced evaporative demand inside the greenhouse [34,35]. Maximum ET C values occurred in the month of May when the crop is fully matured with greater level of ground cover [15].…”

Section: Crop Evapotranspiration (Etc) and Crop Coefficient (Kc)mentioning

confidence: 99%

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Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Singh¹,

Tiwari²,

Dt³

2016

Irrigat Drainage Sys Eng

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Section: Estimation Of Eto For Inside the Greenhouse And Open Fieldsupporting

confidence: 70%

Section: Crop Evapotranspiration (Etc) and Crop Coefficient (Kc)mentioning

confidence: 99%

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Singh¹,

Tiwari²,

Dt³

2016

Irrigat Drainage Sys Eng

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“…There was a poor relationship between the WU and the incoming radiation under greenhouses in tropical climate conditions opposed to other climatic conditions (FERNÁNDEZ et al 2010;TA et al 2011). This fact may be partly explained by the steadiness of the radiation inside the greenhouse due to the low temporal variation of the solar radiation in tropical climates, the high fraction of diffuse radiation due to the high cloudiness of the atmosphere in equatorial areas (SHARMA & PAL, 1965) and the low transmissivity of the plastic film to the radiation, in general, and to the diffuse radiation in particular.…”

Section: Resultsmentioning

confidence: 97%

“…The approach proposed by Penman-Monteith has been applied to greenhouse conditions by STANGHELLINI (1987), JOLLIET & BAILEY (1992), BAILEY et al (1993), BAKKER (1991) and BAILLE et al (1994b) among others. The Penman-Monteith method estimates the reference evapotranspiration (ET 0 ) with a fairly high precision under plastic greenhouses in Mediterranean conditions (FERNÁNDEZ et al 2010). These authors also concluded that the solar radiation was the main factor affecting the ET 0 and developed a radiation method for the estimation of greenhouse ET 0 , which was locally calibrated and performed correctly under different conditions.…”

Section: Introductionmentioning

confidence: 97%

Irrigation water consumption modelling of a soilless cucumber crop under specific greenhouse conditions in a humid tropical climate

Salcedo

Reca²,

Pérez-Saiz³

et al. 2017

Cienc. Rural

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The irrigation water consumption of a soilless cucumber crop under greenhouse conditions in a humid tropical climate has been evaluated in this paper in order to improve the irrigation water and fertilizers management in these specific conditions. For this purpose, a field experiment was conducted. Two trials were carried out during the years 2011 and 2014 in an experimental farm located in Vinces (Ecuador). In each trial, the complete growing cycle of a cucumber crop grown under a greenhouse was evaluated. Crop development was monitored and a good fit to a sigmoidal Gompertz type growth function was reported. The daily water uptake of the crop was measured and related to the most relevant indoor climate variables. Two different combination methods, namely the Penman-Monteith equation and the Baille equation, were applied. However, the results obtained with these combination methods were not satisfactory due to the poor correlation between the climatic variables, especially the incoming radiation, and the crop's water uptake (WU). On contrary, a good correlation was reported between the crop's water uptake and the leaf area index (LAI), especially in the initial crop stages. However, when the crop is fully developed, the WU stabilizes and becomes independent from the LAI. A preliminary model to simulate the water uptake of the crop was adjusted using the data obtained in the first experiment and then validated with the data of the second experiment.

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“…Instead of a total dependency on nature, both greenhouse characteristics and climate control equipment have a high impact on the evapotranspiration (Boulard, 2003;Jolliet and Bailey, 1992). Fernández et al (2010) report a reduced reference evapotranspiration (ETo) by 21.4%, when using plastic greenhouses in Spain. Greenhouses also reduce the wind speed considerably, which has a reducing impact on the reference evapotranspiration (Fernández et al, 2010;Möller and Assouline, 2006).…”

Section: Fao Penman-monteith Equationmentioning

confidence: 99%

Opportunities and Challenges of Multi-Loop Aquaponic Systems

Goddek

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v Preface Which of us is not familiar with this situation during the student time: on a Wednesday night, one wants to go out to grab a beer ("just one Duveltje") with friends. Until the end of the night (and several beers later) one was trapped in several discussions about religion, politics, and one's field of study. I have to admit, that I have been involved in plenty of such discussions, which also stems from the fact that I am a very discussion-friendly and curious person. However, I caught myself often saying the same sentence "well, the idea is great, but it actually does not really work as it should" with respect to two topics: Aquaponics and Communism. This might appear to be a somewhat far-fetched statement, however, for those who have neither read Marx nor followed the development of aquaponics the last 30 years: in a nutshell it can be stated that both of these ideas follow bottom-up (i.e. local and circular) approaches (i.e. for small farmers and individuals).Additionally to the above, I honestly believe that in times of the financial crisis -in which multinational corporations such as [think of big corporations that produce GMO seeds that are immune to their pesticides] increase their quasi-monopoly positions on the global food market -a paradigm shift back to human-centred and sustainable agricultural development is required to ensure both (1) healthy (i.e. pesticide free) diets and (2) food independence. In contrast, organic, fair trade, and GMO-free food have recently gained rapidly increasing popularity. Consumers want transparent and extensive information about the origin and manufacture of the foodstuffs they buy. The development of agriculture and how to use (finite) resources efficiently will be crucial with respect to the global development and the future of the earth in general. Right now, we are at a crossroads in our history that will determine whether either the people or the corporations will be empowered. I intended to provocatively illustrate this new class conflict on the book cover with the objective to polarize and thus energize the readers themselves to make thoughts and reflections.So far, I have dedicated over 4 years of my life to study and improve aquaponic systems in the hope that one day their production efficiency will be able to compete with state-of-theart hydroponic food production systems, while improving circularity. In this thesis, I will try to demonstrate why aquaponics does not face the same pitfalls as communism, while sharing the empowering people-minded and bottom-up qualities that are required in the 21st century.

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Measurement and estimation of plastic greenhouse reference evapotranspiration in a Mediterranean climate

Cited by 157 publications

References 34 publications

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Estimation of Crop Coefficient and Water Requirement of Dutch Roses (Rosa hybrida) under Greenhouse and Open Field Conditions

Irrigation water consumption modelling of a soilless cucumber crop under specific greenhouse conditions in a humid tropical climate

Opportunities and Challenges of Multi-Loop Aquaponic Systems

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