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All Journal Journal of Tropical Crop Science Jurnal Agroteknologi
Riti, Dominggus Ngongo
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Agriculture, Biological Sciences & Forestry

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The Effect of Shade and Harvest Age on Biomass and Patchouli Oil Production in the Lowlands Riti, Dominggus Ngongo; Kurniawati, Ani; Nurcholis, Waras
Journal of Tropical Crop Science Vol. 12 No. 02 (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.12.02.426-436

Abstract

This study investigated the effects of different shade levels and harvest ages on the growth, biomass yield, and essential oil production of the patchouli (Pogostemon cablin Benth.) cultivar Sidikalang, cultivated in a lowland environment. The experiment was conducted in Bogor from August 2023 to February 2024, using a nested design with three shade treatments (no shade, 55%, and 75%) and three harvest ages (4, 5, and 6 months). The results indicated that 75% shade significantly enhanced vegetative growth, including plant height, number of secondary branches, and leaf production, suggesting that this level of shading is beneficial for patchouli cultivation in lowland areas. However, these effects were not significantly different from those observed under 55% shade. The highest essential oil yields were obtained from patchouli plants grown under 75% shade and harvested at 4 months, as well as from those grown under full sunlight and harvested at 6 months.
Pengaruh Pupuk Organik Cair terhadap Pertumbuhan dan Jumlah Daun Tanaman Kacang Panjang (Vigna sesquipedali) Danga, Jeni Rambu Yaku; Bulu, Sesilia Irmaya; Riti, Dominggus Ngongo; Saghu, Yustina Sriyutun; Nduka, Restisary; Wohangara, Maria Gorety Landu; Lika, Rusnianti Rambu
Jurnal Agroteknologi (Agronu) Vol 5 No 01 (2026): Jurnal Agroteknologi
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53863/agronu.v5i01.2161

Abstract

Liquid organic fertilizer (LOF) is increasingly utilized as an organic-based agricultural input to support environmentally sustainable crop production. The presence of nutrients in soluble form enables LOF to enhance vegetative growth during the early stages of plant development. This study assessed the vegetative response of long bean (Vigna unguiculata subsp. sesquipedalis) to LOF application using plant height and leaf number as growth parameters. The experiment was conducted from October to November 2025 at an agrotechnology practicum field characterized by relatively uniform environmental conditions. A Completely Randomized Design (CRD) was applied with three treatments, namely no LOF application, LOF at a rate of 20 mL per plant, and LOF at 40 mL per plant, each replicated three times. The collected data were analyzed using analysis of variance at a 5% significance level, followed by the Least Significant Difference test. The results revealed that different LOF application rates significantly affected vegetative growth of long bean plants. The application of LOF at 20 mL per plant resulted in the highest mean plant height (25.5 cm), which was significantly greater than that of the control (18.0 cm) and the 40 mL treatment (21.0 cm). A similar trend was observed for leaf number, where the 20 mL treatment consistently produced higher values than the other treatments. These findings indicate that LOF applied at a rate of 20 mL per plant is the most effective dosage for promoting early vegetative growth of long bean.
Co-Authors Ani Kurniawati Bulu, Sesilia Irmaya Danga, Jeni Rambu Yaku Lika, Rusnianti Rambu Nduka, Restisary Saghu, Yustina Sriyutun Waras Nurcholis Wohangara, Maria Gorety Landu