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All Journal Jurnal Keteknikan Pertanian Tropis dan Biosistem Journal of Tropical Crop Science
Defitrianida, Asyhuriyah Wardah
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Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Energy Mechanical Engineering

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Morphophysiological Study of Kecapi (Sandoricum koetjape Merr.) Seedlings Against Different Artificial Light Spectra and Intensities Defitrianida, Asyhuriyah Wardah; Poerwanto, Roedhy; Hapsari, Dhika Prita; Matra, Deden Derajat
Journal of Tropical Crop Science Vol. 12 No. 03 (2025): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.12.03.604-614

Abstract

Kecapi (Sandoricum koetjape Merr.) is a tropical fruit species that belongs to the Meliaceae family. Kecapi trees require 5-7 years to produce fruit when grown from seeds, necessitating efforts to accelerate their growth, including through the modification of light. This research aimed to study kecapi’s morphological, physiological, and anatomical responses to light spectra and intensities from light-emitting diodes. The experiment was designed using a two-factor, completely randomized design (CRD), namely LED light spectrum (white and purple) and light intensity (2 and 4 lights). The result showed that morphological and vegetative growth were significantly affected under the high-intensity purple LED treatment. The low-intensity purple LED treatment increased stomatal conductance and chlorophyll-b synthesis. The transpiration rate was highest under the high intensity white LED treatment. Low-intensity white LED treatment only increased the abaxial stomatal aperture. As the intensity increased, it also increased N-Total content but decreased micronutrient levels in the leaves.
Effects of Static and Dynamic LED Lighting Systems with Spectral Variations on the Morphological Growth of Sugar Apple (Annona squamosa) Seedlings Defitrianida, Asyhuriyah Wardah
Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 14 No. 1 (2026): April 2026
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Seedling production is an important stage for tropical fruit crops, including sugar apple (Annona squamosa), and is strongly influenced by light quality. Light fluctuations in tropical environments often inhibit seedling growth, indicating the need for a more stable lighting system. This study aimed to evaluate the effects of LED design models and light spectra on the morphology of sugar apple seedlings. The experiment used a two-factor Completely Randomized Design (CRD), consisting of LED models (static and dynamic) and light spectra (blue, red, and white), with eight replications for each treatment. The study was conducted in a screenhouse with 60% shading. Observed parameters included plant height, leaf number, stem diameter, canopy width, root length, and biomass. The results showed that the static system provided the best relationship with canopy development (R² = 0.757), while the dynamic system produced higher light intensity but had the potential to cause photochemical stress. White light gave the best growth response (R² = 0.851), followed by red, whereas blue showed the lowest relationship. Correlation analysis indicated that static lighting supported more stable vegetative growth. Overall, static LED with white spectrum was the most effective combination for early growth of sugar apple seedlings under the conditions of this study and is recommended for tropical fruit seedling production.
Co-Authors Dhika Prita Hapsari Matra, Deden Derajat Roedhy Poerwanto