Sazali, Norsuhailizah (2023) Hydrothermal synthesis of zeolite from low grade Kaolin: application as soil amendment and nutrient retention to increase the cherry tomato (cherry solanum lycopersicum var. cerasiforme) yield. Doctoral thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Zeolite- Linde Type A (LTA) is widely known as an aluminosilicate mineral that has been intensively used as a soil amendment and water retention in the agriculture sector to increase the growth of the plant. The proposed hydrothermal synthesis of zeolite-LTA in this current work from kaolin (Delta Corp Sdn Bhd) via controlling the molarity of NaOH during aging and crystallization time has shown higher crystallinity percentage of yield (88.45%) at lower molarity of 1M NaOH and 9hrs minimum crystallization time. The performance of zeolite LTA as a soil amendment and water retention was further analyzed in cherry tomato growth in seven different condition in determining the optimum ratio of soil and fertilizer. The implementation of Least Significant Difference (LSD) post-hoc test (P≤0.05) enable the effectiveness measurement all soil treatments towards the plant growth and leaching analysis. Analysis from the obtained results of plant growth including plant height, number of leaves, stem width diameter, revealed that the 6g of zeolite amended in soil has a higher significant difference towards the other treatments. For bulk density, 6g of zeolite shows a highly significant response and effect difference towards compared to other treatments. For the chemical analysis, in CEC, 6g of zeolite shows a significant difference from other treatments at harvest 1, 2 and 3. The availability of nutrients in the soil (mean K, Na, Ca and Mg), at all harvests, 6g of zeolite show significant difference of mean K and Mg toward other treatments. Analysis from all results performance’s experiments suggest that indicates that 6g of zeolite has the most potential as of soil amendments for both plant growth and controlled-release applications. This study revealed that the addition of zeolite is not only able to increase the yield harvest of production via improvement enhancement of nutrient efficiency uptakes but also reduce the utilization of fertilizer that able to minimize the cost and pollution which is one way of reducing carbon footprints due to pollution

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