Effects of Water Hyacinth Compost on Growth of Rhodomyrtus Tomentosa (Aiton) Hassk. and Rhodomyrtone Yield
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center of Antimicrobial Biomaterial Innovation-Southeast Asia and Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Division of Computation Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
- Center for Genomics and Bioinformatics Research, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
Received: 2024-08-20
Revised: 2024-12-10
Accepted: 2026-01-26
Published in Issue 2026-09-30
Copyright (c) 2026 Sara Bumrungsri, Unitsa Sangket, Supayang P. Voravuthikunchai, Aunkamol Kumngen, Noodchanath Kongchouy, Jutarut Iewkittayakorn (Author)

This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
Purpose: Water hyacinth (WH) is an aquatic weed that has negatively impacted aquatic ecosystems. WH can be easily composted and used as a soil ameliorant to improve plant growth. In this study, the effects of WH compost on the growth of Rhodomyrtus tomentosa were evaluated.
Methods: Native R. tomentosa seedlings were cultivated with WH compost in two different systems: a pot cultivation with soil: WH compost mixed in ratios ranging from 10:0 to 7:3 and an open field cultivation with 1 to 3 parts of WH added to the topsoil. Plant growth characteristics and rhodomyrtone yield were also investigated.
Results: Plant height and numbers of stems were not significantly different between the two cultivation methods (p>0.05). Plants treated with WH compost had more leaves than those not treated with WH compost (p<0.05). Growing the plants with WH compost resulted in significant increases in leaf biomass, especially, rhodomyrtone content in both cultivation systems. In the pot cultivation system, the highest rhodomyrtone yield (0.99 mg/mL) was obtained from R. tomentosa leaf from plants growing in a soil and coconut coir medium enriched with 1 part of WH compost by volume. In the field cultivation system, the highest rhodomyrtone yield (0.86 mg/mL) was obtained from R. tomentosa leaf sampling from plants growing in soil with 1 part of WH added to the soil at the planting period and once every month.
Conclusion: WH compost demonstrated its potential for sustainable cultivation of R. tomentosa that can be fruitfully propagated for commercial purposes.
Keywords
- Cultivation,
- Field planting,
- Potting soil,
- Rhodomyrtus tomentosa,
- Rhodomyrtone,
- Water hyacinth compost
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