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http://dx.doi.org/10.7235/hort.2014.14013

Growth Model of Common Ice Plant (Mesembryanthemum crystallinum L.) Using Expolinear Functions in a Closed-type Plant Production System  

Cha, Mi-Kyung (Major in Plant Resources and Environment, Jeju National University)
Kim, Ju-Sung (Major in Plant Resources and Environment, Jeju National University)
Cho, Young-Yeol (Major in Horticultural Science, Jeju National University)
Publication Information
Horticultural Science & Technology / v.32, no.4, 2014 , pp. 493-498 More about this Journal
Abstract
The objective of this study was to make growth and yield models for common ice plant (Mesembryanthemum crystallinum L.) using expolinear functional equations in a closed-type plant production system. Three-band radiation type fluorescent lamps with a 12-hours photoperiod were used, and the light intensity was $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$. Nutrient film systems with three layers were used for plant growth. Environmental conditions, such as air temperature, relative humidity and $CO_2$ concentration were controlled by an ON/OFF operation. Leaf area, shoot fresh and dry weights, light use efficiency of common ice plant as function of days after transplanting, accumulative temperature and accumulative radiation were analyzed. Leaf area, shoot fresh and dry weights per area were described using an expolinear equation. A linear relationship between shoot dry and fresh weights was observed. Light use efficiency of common ice plant was $3.3g{\cdot}MJ^{-1}$ at 30 days after transplanting. It is concluded that the expolinear growth model can be a useful tool for quantifying the growth and yield of common ice plant in a closed plant production system.
Keywords
hydroponics; light use efficiency; modeling; shoot dry weight per area; shoot fresh weight per area;
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