How intelligently controlled LEDs can be used to more efficiently manage supplemental lighting in greenhouse production systems

2020 ◽  
pp. 127-134
Keyword(s):  
Production Systems ◽  
Greenhouse Production ◽  
Supplemental Lighting

Technological and ecological approaches to design and manage sustainable greenhouse production systems

2015 ◽  
pp. 45-52
Author(s):  
C. Poncet ◽  
C. Bresch ◽  
H. Fatnassi ◽  
L. Mailleret ◽  
A. Bout ◽  
...  
Keyword(s):  
Production Systems ◽  
Greenhouse Production

Comprehensive assessments of soil fertility and environmental quality in plastic greenhouse production systems

Geoderma ◽  
2021 ◽  
Vol 385 ◽  
pp. 114899
Author(s):  
Ya'nan Fan ◽  
Yanxia Zhang ◽  
Zhikun Chen ◽  
Xinkai Wang ◽  
Biao Huang
Keyword(s):  
Soil Fertility ◽  
Environmental Quality ◽  
Production Systems ◽  
Greenhouse Production

scholarly journals Modelling a complex technical system of greenhouse production: the foundations of an interdisciplinary approach

2018 ◽  
Vol 226 ◽  
pp. 02019 ◽  
Author(s):  
Evgeniya P. Klyuchka ◽  
Viktor V. Radin ◽  
Leonid M. Groshev ◽  
Valeriy P. Maksimov
Keyword(s):  
Production Systems ◽  
Interdisciplinary Approach ◽  
Simulation Models ◽  
Conceptual Approach ◽  
Greenhouse Production ◽  
Geoinformation Systems ◽  
Biological Objects ◽  
Complex Technical System ◽  
Production Dynamic ◽  
Comprehensive Study

The fundamentals of an interdisciplinary approach to the design of greenhouse production systems are considered, in which biological objects (plants and humans) are present. The conceptual approach of the software solution is analyzed, synthesizing on the basis of the objectoriented concept such directions as disciplines on the construction of greenhouse production, dynamic simulation models, geoinformation systems. Based on the study of this issue, the conclusion was made about the advisability of applying an interdisciplinary approach for a comprehensive study of the projected complex biotechnical systems of greenhouse production.

An environmental impact calculator for greenhouse production systems

2013 ◽  
Vol 118 ◽  
pp. 186-195 ◽  
Author(s):  
Marta Torrellas ◽  
Assumpció Antón ◽  
Juan Ignacio Montero
Keyword(s):  
Environmental Impact ◽  
Production Systems ◽  
Greenhouse Production

scholarly journals Genetic Mapping of the Tomato Quality Traits Brix and Blossom-end Rot Under Supplemental LED and HPS Lighting Conditions

2021 ◽  
Author(s):  
Aina Prinzenberg ◽  
Hanneke van der Schoot ◽  
Richard GF Visser ◽  
Leo Marcelis ◽  
Ep Heuvelink ◽  
...  
Keyword(s):  
Genetic Locus ◽  
Chromosome 2 ◽  
Light Conditions ◽  
Chromosome 11 ◽  
Greenhouse Production ◽  
Lighting Conditions ◽  
Blossom End Rot ◽  
Supplemental Lighting ◽  
Brix Value ◽  
The Impact

Abstract LED lighting has emerged as alternative to the current HPS standard in greenhouse production. However little is known about the impact on fruit quality under the different light spectra. We grew a biparental tomato RIL population between September 2019 and January 2020 under two commercial greenhouse supplemental lighting conditions, i.e. HPS, and 95% red/ 5% blue- LED, of about 220 µmol m− 2 s− 1 at maximum canopy height for 16h per day. Differences in Brix and blossom-end rot (BER) between the two light conditions were observed and we studied the genetic influences on those traits, separating genetics located on chromosomes from genetics located in plastids. The Brix value was on average 11% lower under LED than under HPS supplemental lighting. A LED-light specific QTL for Brix was identified on chromosome 6. This QTL can be of interest for breeding for tomato varieties cultivated under LED supplemental lighting. A Brix-QTL on chromosome 2 was found for both light conditions. In our study fewer plants developed BER under LED supplemental lighting than under HPS. We identified a novel genetic locus on chromosome 11 for the incidence of BER that lead to a difference in about 20% of fruits with BER. This genetic component was independent of the light.

scholarly journals Controlling Height with Temperature

1998 ◽  
Vol 8 (4) ◽  
pp. 535-539 ◽  
Author(s):  
Robert Berghage
Keyword(s):  
Plant Height ◽  
Production Systems ◽  
Formation Rate ◽  
Internode Length ◽  
Temperature Management ◽  
Night Temperature ◽  
Greenhouse Production ◽  
Node Number ◽  
Height Control ◽  
Average Temperature

Temperature management has emerged as an important tool for plant height control in greenhouse production systems. This is particularly important in vegetable transplant production where chemical controls for plant height are limited or not legal. Plant height is a function of the number of nodes and the length of each internode, and both are strongly influenced by greenhouse temperatures. Node number, or formation rate, is primarily a function of the average greenhouse temperature, increasing as the average temperature increases. Internode length is strongly influenced by the relationship between the day and night temperature, commonly referred to as DIF (day temperature - night temperature). As DIF increases, so does internode length in most plant species studied. Although the nature and magnitude of temperature effects vary with species, cultivar, and environmental conditions, these two basic responses can be used to modify transplant growth. Although data are limited, controlling transplant height with temperature does not appear to adversely influence plant establishment or subsequent yield.

scholarly journals Irrigation of Greenhouse Crops

Horticulturae ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 7 ◽  
Author(s):  
Georgios Nikolaou ◽  
Damianos Neocleous ◽  
Nikolaos Katsoulas ◽  
Constantinos Kittas
Keyword(s):  
Personal Experience ◽  
Management Practices ◽  
Production Systems ◽  
Irrigation Management ◽  
Daily Basis ◽  
Irrigation Scheduling ◽  
Greenhouse Production ◽  
Greenhouse Crops ◽  
Irrigation Control ◽  
Further Development

Precision agricultural greenhouse systems indicate considerable scope for improvement of irrigation management practices, since growers typically irrigate crops based on their personal experience. Soil-based greenhouse crop irrigation management requires estimation on a daily basis, whereas soilless systems must be estimated on an hourly or even shorter interval schedule. Historically, irrigation scheduling methods have been based on soil or substrate monitoring, dependent on climate or time with each having both strengths and weaknesses. Recently, plant-based monitoring or plant reflectance-derived indices have been developed, yet their potential is limited for estimating the irrigation rate in order to apply proper irrigation scheduling. Optimization of irrigation practices imposes different irrigation approaches, based on prevailing greenhouse environments, considering plant-water-soil relationships. This article presents a comprehensive review of the literature, which deals with irrigation scheduling approaches applied for soil and soilless greenhouse production systems. Irrigation decisions are categorized according to whether or not an automatic irrigation control has the ability to support a feedback irrigation decision system. The need for further development of neural networks systems is required.

scholarly journals Comparison of Selected Costs in Greenhouse Cucumber Production with LED and HPS Supplemental Assimilation Lighting

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1342
Author(s):  
Katarzyna Kowalczyk ◽  
Dawid Olewnicki ◽  
Małgorzata Mirgos ◽  
Janina Gajc-Wolska
Keyword(s):  
Light Source ◽  
Crop Production ◽  
Light Sources ◽  
Gross Margin ◽  
Absolute Level ◽  
Greenhouse Production ◽  
Light Emitting ◽  
Winter Crop ◽  
High Expenditure ◽  
Supplemental Lighting

The amount of energy used in agricultural production, processing and distribution is constantly increasing. During the winter months in the greenhouse production industry, the supplemental lighting required to keep up production levels results in high expenditure. Current technology uses broadband high-pressure sodium (HPS) lamps, which is not the most efficient light source for crop production. Recent breakthroughs in the development of light source technologies have led to new opportunities for the use of sustainable and highly efficient light sources in the form of LEDs (light-emitting diodes) for greenhouse lighting. The aim of the study was to evaluate the efficiency of using photosynthetically active radiation (PAR) light for cucumber yielding, production processes and its influence on the variable costs in the cultivation of cucumbers using three different types of lighting. The research was carried out using three individual greenhouse growing area compartments, whereby the plants contained within were lit using three combinations: 1. HPS standard illumination from top HPS sodium lamps—control, 2. HPS-LED—HPS toplighting and LED interlighting, and 3. LED-LED—100% LED lighting, both toplighting and interlighting with LED. The research was conducted in two independent winter crop cycles. The results of the research conducted indicate that the efficiency of light use was the highest in the LED-LED combination and the lowest in HPS, and the use of supplemental lamp lighting in the LED-LED combination (interlighting and toplighting) gives the most favorable surplus of all the variable costs over the value of production to be obtained. Despite the highest absolute level of variable costs in this type of supplemental lighting, the production value was higher by as much as 32.55% in relation to the HPS combination, which also translated into a gross margin that was higher by about ¾. However, it is worth pointing out that, in the HPS-LED combination, the share of lighting and heating costs in the total value of production was the lowest. It is also a combination currently recommended in the literature as being the most beneficial in greenhouse production.

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