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Effect of surfactant modified zeolite (SMZ) added in propagating substrate for the germination of some vegetables

Loo, Yan Jie and Nik Malek, Nik Ahmad Nizam and Teo, Wee Siang and Hamzah, Niza Syafiqah and Dzkulfli, Noor Hidayah (2015) Effect of surfactant modified zeolite (SMZ) added in propagating substrate for the germination of some vegetables. In: 3rd International Conference on Food and Agricultural Engineering (ICFAE2015), 2 August, 2015, Spain.

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Official URL: http://www.worldresearchlibrary.org/up_proc/pdf/43...


The effect of using propagating substrate (PS) as a sole growing medium, zeolite-added PS and surfactant-modified zeolite (SMZ) added PS for the germination and growth of okra (Abelmoschus esculentus), white radish (Raphanus sativus) and pakchoy (Brassica chinensis) was studied. SMZ was prepared by modifying clinoptilolite type zeolite with cationic surfactant hexadecyltrimethyl ammonium (HDTMA). SMZ can easily adsorb anionic nutrients such as phosphate, nitrate and nitrite due to HDTMA bilayer formation on zeolite surfaces that reversed negatively charged of zeolite surfaces to positive charge. This can be shown by the results in a controlled release and plant growth studies. The application of SMZ in PS reduced the amount of nutrients leached out from PS compared to zeolite added PS and only PS. The amount of nutrients in SMZ(15)-PS(50) (ratio of SMZ(15): propagating substrate (50)) showed the lowest leaching due to the greater tendency to hold the nutrients and also released them slowly. There were significant difference (P < 0.05) in growth parameters of three types of vegetables grown in different substrates. The mean of height, fresh mass and dry mass of A. esculentus, R. sativus and B. chinensis grown on SMZ(1)-PS(50) were significantly higher than those of zeolite added substrate. The results implicitly suggested that the studied plant showed better response if SMZ was used as a controlled release nutrients in propagating substrate rather than the unmodified zeolite.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:propagating substrate, controlled released system
Subjects:R Medicine > R Medicine (General)
Divisions:Biosciences and Medical Engineering
ID Code:60808
Deposited By: Fazli Masari
Deposited On:01 Mar 2017 06:46
Last Modified:09 Aug 2017 04:35

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