A CONTROLLED IRRIGATION METHOD USING INTEGRATED SOLAR RADIATION HAS EFFECT ON BOTH THE PRODUCTION AND QUALITY OF SINGLE-NODE CUTTING ROSE 'VERSILLIA'

2007 ◽  
pp. 379-385 ◽  
Author(s):  
J.H. Lee ◽  
Y.B. Lee ◽  
E.Y. Choi ◽  
E.Y. Yang
Keyword(s):  
Solar Radiation ◽  
Single Node ◽  
Irrigation Method ◽  
Controlled Irrigation

scholarly journals Growth and Flower Quality of Single-node Cutting Rose `Versillia' Under Irrigation Control by Integrated Solar Radiation in Aeroponics

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 764B-764
Author(s):  
Joo Hyun Lee* ◽  
Yong-Beom Lee ◽  
Kang Pal Kwon
Keyword(s):  
Solar Radiation ◽  
Control Method ◽  
Stem Length ◽  
Control Methods ◽  
Fresh Weight ◽  
Single Node ◽  
Irrigation Control ◽  
Flower Quality ◽  
Better Than

This study was conducted to determine the growth and flower quality of single-node cutting rose `Versillia' under two different irrigation control methods (time clock and integrated solar radiation). The frequency of irrigation was controlled by time clock and integrated solar radiation of 1.25 and 2.09 and 3.35 MJ·m-2 in aeroponics. Photosynthesis was the highest in the integrated solar radiation of 2.09 MJ·m-2 and 1.25 MJ·m-2 the lowest in the integrated solar radiation of 3.35 MJ·m-2. The growth of single-node cutting rose `Versillia' at 1.25 MJ·m-2 and 2.09 MJ·m-2 was better than 3.35 MJ·m-2 for stem length and fresh weight. Root activities of single-node cutting rose were significantly higher at 2.09 MJ·m-2 and 1.25 MJ·m-2 than those at 3.35 MJ·m-2. The irrigation control method using integrated solar radiation of 1.25-2.09 MJ·m-2 showed a improvement of plant growth and flower quality.

Effects of fish-derived protein hydrolysate, animal-based organic fertilisers and irrigation method on the growth and quality of grape tomatoes

2021 ◽  
pp. 1-18
Author(s):  
Juana Cruz García-Santiago ◽  
Carlos Javier Lozano Cavazos ◽  
José Antonio González-Fuentes ◽  
Alejandro Zermeño-González ◽  
Emilio Rascón Alvarado ◽  
...  
Keyword(s):  
Protein Hydrolysate ◽  
Irrigation Method ◽  
Organic Fertilisers

scholarly journals Photo-selective shade nets on the production and quality of sugarcane plantlets

2019 ◽  
Vol 23 (5) ◽  
pp. 366-371 ◽  
Author(s):  
José J. F. Cordeiro Júnior ◽  
Héliton Pandorfi ◽  
José A. D. Barbosa Filho ◽  
Alex S. Moraes ◽  
Luiz A. de Almeida Neto ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Substrate Temperature ◽  
Principal Component ◽  
Global Solar Radiation ◽  
Saccharum Officinarum ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT Brazil is the world’s largest producer of sugarcane (Saccharum officinarum L.) and research aimed at propagation has promoted higher quality in production. The objective of this study was to investigate the effect of the variation of micrometeorological elements on the survival and quality of pre-sprouted sugarcane plantlets. The study was carried out in a protected environment (UFRPE). Plantlets of the cultivar RB92579 were obtained by the technique of production of pre-sprouted plantlets. The protected environments were divided into four modules covered with low-density polyethylene plastic + photo-selective shade nets and one module without shade net. Micrometeorological data of global and photosynthetically active solar radiation, air temperature, substrate temperature, relative humidity and the solar radiation spectrum were recorded in each module. The experiment was conducted in a completely randomized design and the principal component analysis was used to verify the association between the cultivation modules, micrometeorological variables and crop variables. Anti-UV low-density polyethylene plastic + freshnet led to lower transmittance of global solar radiation, higher percentage of photosynthetically active radiation and lower plantlet mortality. Substrate temperature above 30.2 °C resulted in higher plantlet mortality. Larger spectrum in the red range led to the production of better quality plantlet. The use of freshnet shade net promoted adequate conditions for the cultivation of sugarcane plantlets and allows obtaining better quality plantlets.

Lifetime Maximization of Target-Covered WSN Using Computational Swarm Intelligence

2019 ◽  
pp. 383-425
Author(s):  
Roselin Jones
Keyword(s):  
Critical Points ◽  
Residual Energy ◽  
Optimization Approach ◽  
Single Node ◽  
Artificial Bee Colony Optimization ◽  
Bee Colony ◽  
Dynamic Deployment ◽  
Coverage Hole ◽  
Bee Colony Optimization

In target-covered WSN, all critical points (CPs) are to be monitored effectively. Even a single node failure may cause coverage hole reducing the lifetime of the network. The sensor has non-rechargeable battery, and hence, energy supervision is inevitable. To maximize the lifetime of the WSN with guaranteed coverage and effective battery utilization, the activities of the sensors are to be scheduled and also the sensors may be repositioned towards the critical points. This chapter proposes an energy-efficient coverage-based artificial bee colony optimization (EEC-ABC) approach that exploits the intelligent foraging behavior of honeybee swarms to solve EEC problem to maximize the lifetime of the WSN. It also adheres to quality of service metrics such as coverage, residual energy, and lifetime. Similarly, energy-balanced dynamic deployment (EB-DD) optimization approach is proposed to heal the coverage hole to maximize the lifetime of the WSN. It positions the self-deployable mobile sensors towards the CPs to balance their energy density and thus enhances the lifetime of the network.

scholarly journals Assessment of Indoor Environmental Quality for Retrofitting Classrooms with An Egg-Crate Shading Device in A Hot Climate

2019 ◽  
Vol 11 (4) ◽  
pp. 1078 ◽  
Author(s):  
Carmen Calama-González ◽  
Rafael Suárez ◽  
Ángel León-Rodríguez ◽  
Simone Ferrari
Keyword(s):  
Solar Radiation ◽  
Environmental Quality ◽  
Indoor Environmental Quality ◽  
Cooling Systems ◽  
Incident Solar Radiation ◽  
Hot Climate ◽  
Shading Device ◽  
Operative Temperatures ◽  
Do So

In the Mediterranean climate, a large number of educational buildings suffer from discomfort due mostly to energy-deficient thermal envelopes and a lack of cooling systems. Impending climate change is expected to worsen overheating in classrooms, especially during heatwave periods. Therefore, the protection of window openings to reduce incident solar radiation while maintaining adequate indoor environmental quality must be considered a necessary key focus. The main objective of this research is to assess the influence of an egg-crate shading device on the indoor environmental quality of a classroom in Southern Spain. To do so, two classrooms—with and without this shading device—were simultaneously monitored over a whole year. The implementation of an egg-crate shading device allowed for a significant reduction of the incident solar radiation, both in summer and mid-season (around 45–50%), which objectively slightly conditioned indoor operative temperatures. Given the noticeable influence of the user patterns observed, indoor illuminance was also improved, as the rolling shutters tended to be opened at higher aperture levels.

scholarly journals Comparative Analysis of All-Sky Luminous Efficacy Models Based on Calculated and Measured Solar Radiation Data of Four Worldwide Cities

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Donghyun Seo
Keyword(s):  
Solar Radiation ◽  
Luminous Efficacy ◽  
Local Climate ◽  
Data Resource ◽  
Diffuse Solar Radiation ◽  
Radiation Data ◽  
Data Prediction ◽  
Mandatory Requirement ◽  
Solar Radiation Model

Luminous efficacy model uses solar radiation data to generate illuminance data, and its performance also depends on the quality of solar radiation data. Various luminous efficacy models are reviewed and evaluated to select a universal luminous efficacy model. Since most luminous efficacy models are fitted with specific local climate characteristics, the model that has the least locality as well as accuracy is a mandatory requirement. Three representative luminous efficacy models are selected and evaluated with measured solar radiation and illuminance data from four worldwide cities. It was found that all the evaluated models provide good predictions (over 0.96 R2 value) for both global and diffuse illuminance. Among them, the Perez luminous efficacy model shows the highest performance in terms of accuracy and bias. However, illuminance data prediction based on estimated solar radiation data is more common practice rather than those from measured solar data. The performance of the selected luminous efficacy models is evaluated when recently proposed universal solar radiation model supplies predicted solar radiation data. The result indicates that the quality of estimated solar radiation data has a much deeper impact on the performance of the luminous efficacy model. Within the current limited technology and measured data resource, the consecutive processing of the modified Zhang and Huang solar model and Perez luminous efficacy model could provide the best option to predict both global and diffuse solar radiation and illuminance. But, users of the model-based illuminance data should interpret their simulation results with the error (30%~40% in RMSE and ±6% in MBE) in predicting global and diffuse illuminance.

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