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All Journal AGRIVITA, Journal of Agricultural Science
Ryoko Hirata
Faculty of Agriculture, University of Miyazaki, Japan
Agriculture, Biological Sciences & Forestry

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Productivity of Eugenol from Clove (Syzygium aromaticum L.) Under Different Light and Soil Water Conditions Adi Setiawan; Satoshi Ito; Yasushi Mitsuda; Ryoko Hirata; Kiwamu Yamagishi; Yasa Palaguna Umar; Ichiro Kamei
AGRIVITA, Journal of Agricultural Science Vol 44, No 1 (2022)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v44i1.2847

Abstract

We examined the effect of watering and shading treatments on eugenol productivity of clove seedlings in order to provide the information of the suitable site conditions for eugenol production. After a six-month experiment growing clove seedlings under twelve treatments (3 shading treatments (0%, 60% and 80%) x 4 watering treatments (1.0, 0.75, 0.5 and 0.25 l/m2/day), the total leaf mass per tree (LM), the eugenol content per unit leaf mass (EL) and the eugenol yield per tree (EY) were measured and compared between treatments. As the results, the low watering rates reduced LM slightly; however, this effect was counteracted by the drastically increased EL under the same conditions, resulting in the highest EY in the least watered treatment (0.25 l/m2/day). Heavy shading consistently reduced LM and EL, resulting in the lowest LY under the 80% shading treatment. The relatively dryer site condition where moderate water stress is likely to occur is more suitable for planting clove trees from the aspect of the for long-term high productivity of eugenol, and that the high tree density which may cause a severe competition and a heavy mutual shading among clove trees should be avoided to maintain long term high productivity.
Growth Response of Clove (Syzygium aromaticum L.) Seedlings to Different Light and Water Regimes Adi Setiawan; Satoshi Ito; Yasushi Mitsuda; Ryoko Hirata; Kiwamu Yamagishi; Yasa Palaguna Umar
AGRIVITA, Journal of Agricultural Science Vol 43, No 1 (2021)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v1i1.2826

Abstract

The growth responses of clove seedling to light and soil water regimes were studied by a field experiment with shading and irrigation treatments to clarify their growth traits at the early stage of plantation establishment. Eighteen-month-old clove seedlings were subjected to twelve treatments, that is, 3 shading treatments (0%, 60% and 80% shading) × 4 watering treatments (1.0, 0.75, 0.5 and 0.25 l/m2 /day), for ca. 6 months. Increment ratio of seedling height (IH), number of newly created buds (NB) during the experimental period and dry mass per plant at the end of the experiment (leaves: LM, stem and branch: SM, root: RM and total plant: TM) were compared among the treatment. The growth of clove seedlings (height < 150 cm) was generally more susceptible to water stress than to low light availability. The growth retardation by water shortage was observed in all the examined parameters except for SM. The effect of the shading treatment appeared to be limited; however, LM and NB showed significantly lower values under the heavy shade (80% shading). We concluded that dense planting of clove seedling with other competitive crops should be avoided to ensure the fast growth of clove seedlings at the establishment stage.
Co-Authors Adi Setiawan Ichiro Kamei Kiwamu Yamagishi Kiwamu Yamagishi Satoshi Ito Yasa Palaguna Umar Yasa Palaguna Umar Yasushi Mitsuda