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All Journal Jurnal Fitopatologi Indonesia UG Journal JURNAL ILMU PERTANIAN JURNAL AGROTEKNOLOGI Gontor AGROTECH Science Journal Jurnal Ilmiah Pertanian Agrosains: Jurnal Penelitian Agronomi Jurnal Agrotek Tropika JURNAL PERTANIAN PRESISI (JOURNAL OF PRECISION AGRICULTURE) JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Daun: Jurnal Ilmiah Pertanian dan Kehutanan JURNAL AGRONIDA Asian Journal of Agriculture Berkala Penelitian Agronomi Agrotechnology Research Journal Jurnal Pembelajaran dan Biologi Nukleus Proceedings Series on Physical & Formal Sciences
Ramdan, Evan Purnama
Department Of Agrotechnology, Faculty Of Industrial Technology, Universitas Gunadarma, Depok, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Mechanical Engineering Medicine & Pharmacology

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Rhizosphere microbial functional traits associated with basal stem rot suppression in oil palm (Elaeis guineensis) RAMDAN, EVAN PURNAMA; GIYANTO, GIYANTO; HARTONO, ARIEF; HIDAYAT, SRI HENDRASTUTI; WIDODO, WIDODO
Asian Journal of Agriculture Vol. 10 No. 1 (2026)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g100105

Abstract

Abstract. Ramdan EP, Giyanto, Hartono A, Hidayat SH, Widodo. 2026. Rhizosphere microbial functional traits associated with basal stem rot suppression in oil palm (Elaeis guineensis). Asian J Agric 10 (1): g100105. https://doi.org/10.13057/asianjagric/g100105. This study aimed to investigate the abundance, diversity, and functional characteristics of rhizospheric microbial communities associated with different levels of Basal Stem Rot (BSR) disease incidence in oil palm plantations, with the understanding that the observed relationships represent associations rather than causal effects. Rhizospheric microbial communities play an essential role in soil health and disease suppression in oil palm plantations. Fifteen composite soil samples were collected from three field blocks with low, moderate, and high BSR incidence in the Rejosari Unit, PT Perkebunan Nusantara VII, Lampung, Indonesia. Microbial populations were quantified using standard plate counts, while diversity indices were assessed using the Shannon-Wiener, evenness, and dominance indices based on morphospecies counts. The results showed that total microbial, bacterial, and fungal populations were significantly higher in soils with low disease incidence (4.99×10⁷, 4.94×10⁷, and 5.18×10⁵ CFU g-¹, respectively) compared to moderate and high categories. Soils with low BSR incidence also exhibited greater microbial and bacterial diversity (H′=1.07 and 0.74) and lower dominance, indicating a more balanced community structure. Non-pathogenic, antagonistic, and Volatile Organic Compound (VOC)-producing microbes predominated in low-incidence soils, contributing to natural disease suppression. LASSO regression identified VOC-producing and antagonistic microbes as predictors associated with BSR incidence, whereas correlation analysis revealed a significant negative association only for VOC-producing microbes (r=-0.60, p=0.02). Nitrogen-fixing microbes were positively associated with disease severity (r=0.63, p=0.01). Although causality was not tested, the results suggest that reduced BSR incidence was more closely associated with specific functional microbial groups, particularly VOC-producing microbes, than with overall microbial abundance or diversity, emphasizing that soil management strategies that support beneficial functional microbial groups may contribute to enhanced soil resilience.
PERTUMBUHAN DAN PRODUKSI SAWI PAGODA (Brassica narinosa L.) PADA PEMBERIAN AB MIX DAN PUPUK ORGANIK CAIR PADA SISTEM HIDROPONIK RAKIT APUNG Agrahaq, Sousa Virgi; Manurung, Adinda Nurul Huda; Ramdan, Evan Purnama
Jurnal Agroteknologi Vol 16, No 2 (2026): Februari 2026
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/ja.v16i2.38305

Abstract

Pagoda mustard (Brassica narinosa L.) is a leafy vegetable with high nutritional value, well-suited for hydroponic cultivation in limited land areas. Research on integrating Liquid Organic Fertilizer (LOF) and AB Mix (inorganic nutrients) in hydroponic systems generally aims to identify a nutrient management strategy that is balanced, cost-effective, and sustainable. This study evaluated the effects of varying AB Mix nutrient concentrations and foliar application of LOF on the growth and yield of pagoda mustard grown in a floating raft hydroponic system. The experimental design was a factorial Randomized Complete Block Design (RCBD) with two factors: AB Mix concentration (800 ppm, 1000 ppm, 1200 ppm, 1400 ppm, and 1600 ppm) and LOF application (0 and 2 ml/l), resulting in 10 treatment combinations with three replications. Growth parameters measured included plant height (cm), number of leaves, leaf area (cm²), root volume (ml), and shoot-to-root ratio. Yield parameters included fresh weight (g) and dry weight (g). Results indicated that AB Mix concentration significantly affected plant height but had no significant impact on the number of leaves, leaf area, root volume, fresh weight, or dry weight. LOF application did not produce statistically significant effects on any measured parameters, although it showed a numerical trend toward increasing average values in most variables. Furthermore, the interaction between AB Mix concentration and LOF application did not significantly influence the growth or yield of pagoda mustard.
Co-Authors Abdul Munif Afriani, Astri Agrahaq, Sousa Virgi Aisyah Aisyah Amalia, Khafidah Amelia Salsabila Amyarsi Mustika Yukti Andini Hanif Arti, Inti Mulyo Ayu Nindita Nuraini Ayu Nindita Nuraini Budiman Budiman Budiman Budiman Dwi Astuti Edi Minaji Pribadi Edi Minjai Pribadi Efi Toding Tondok Ely Lailatul Maghfiroh Erniawati Diningsih Fauziyah, Qonitah Fitri Yulianti Giyanto Giyanto Hendi Hidayat Herik Sugeru Istianah Istianah Kanny, Putri Irene Lestari, Shyntiya Ayu Manurung, Adinda Nurul Huda Miska, Moch. Ega Elman Nikko Nurholis Nurholis Paranita Asnur Pribadi, Edi Minjai Putri Irene Kanny Putri Irene Kanny Qonitah Fauziyah Ratih Kurniasih Reni Rinika Rini Laraswati Risnawati Risnawati Risnawati Risnawati Risnawati Risnawati Salsabila, Amelia Shyntiya Ayu Lestari Shyntiya Ayu Lestari Shyntiya Ayu Lestari SRI HENDRASTUTI HIDAYAT Suryo Wiyono Umi Kalsum Umi Kulsum Ummu Kalsum Warip, Warip Wati, Cheppy Widodo Widodo Widodo Widodo Widodo Widodo