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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Penelitian Saintek Agrikultura Journal of Tropical Soils Jurnal Fakultas Pertanian Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Journal of Degraded and Mining Lands Management Jurnal Agroekoteknologi Jurnal Agro JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Penelitian Pertanian Terapan Kultivasi Jurnal Biologi Tropis JURNAL PHOTON Jurnal Agrotek Indonesia AGROLOGIA : Jurnal Ilmu Budidaya Tanaman Soil REns AGROTEK: Jurnal Ilmiah Ilmu Pertanian Jurnal Agrotropika Journal of Tropical Mycorrhiza
Anne Nurbaity
Fakultas Pertanian, Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Nursing Physics Public Health Social Sciences

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Path analysis of “new” humic acid derived from water hyacinth on phosphorus dynamics in P-deficient Inceptisols and chili response under intensive cultivation Sofyan, Emma Trinurani; Hermawan, Mega Kartika; Sudirja, Rija; Nurbaity, Anne; Fitriatin, Betty Natalie; Mulyani, Oviyanti; Setiawati, Mieke Rochimi; Djuansah, Muhamad Rahman
Journal of Degraded and Mining Lands Management Vol. 13 No. 1 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.131.9669

Abstract

Phosphorus (P) deficiency in intensively cultivated Inceptisols is a persistent problem, not only because of low P reserves but also because of ongoing soil degradation, which reduces fertilizer use efficiency and is characteristic of degraded soils. This study aimed to develop a “new” humic acid from water hyacinth biomass (WHL) through accelerated aerobic decomposition using lignocellulolytic microorganisms and to evaluate its effectiveness in improving soil P dynamics and chili growth responses. The experiment was conducted on P-deficient Inceptisols of the Jatinangor series characterized by low P availability and high metal content. Water hyacinth collected from local reservoirs and rivers was aerobically decomposed with selected microbial starters to enhance humification. WHL was applied in combination with inorganic P fertilizer (SP-36), and its effects on soil P availability, phosphorus dynamics, and chili pepper growth and yield were evaluated using path analysis. The results showed that WHL significantly improved P dynamics mainly through an indirect mechanism involving increased P availability and reduced P fixation, thereby improving chili growth and yield. Application of WHL at a rate of 30 kg ha?¹ combined with SP-36 at a rate of 250 kg ha?¹ produced responses comparable to those obtained with commercial humic acid. These findings indicate that WHL has strong potential as a renewable and cost-effective alternative source of humic acid to improve phosphorus efficiency, restore soil chemical function, and reduce dependence on inorganic P fertilizers in degraded Inceptisols under intensive cultivation.
Path analysis of phosphorus dynamics and chili response to low rank coal-derived humic acid in P-deficient Inceptisols Hermawan, Mega Kartika; Sofyan, Emma Trinurani; Sudirja, Rija; Nurbaity, Anne; Fitriatin, Betty Natalie; Mulyani, Oviyanti; Setiawati, Mieke Rochimi; Djuansah, Muhamad Rahman
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.9893

Abstract

Jatinangor Inceptisols are formed from volcanic material with a high concentration of iron oxide and a low concentration of phosphorus (P), which leads to high rates of P fixation and low P fertilization efficiency. The situation is exacerbated by intensive agricultural practices. This research was conducted to assess the effect of humic acid derived from low rank coal (AHL) as a soil conditioner in enhancing P availability and chili response in P-deficient Inceptisols. The experiment was conducted in the greenhouse of the Soil Chemistry and Plant Nutrition Laboratory at Universitas Padjadjaran. AHL treatments were combined with various doses of SP-36 fertilizer to evaluate their direct and indirect effects on soil chemical properties, phosphate-solubilizing bacteria (PSB) populations, P uptake, and plant responses. The results showed that AHL application did not cause metal toxicity symptoms and significantly increased potential P, available P, cation exchange capacity (CEC), and total PSB populations. The best results were obtained with a combination of AHL at 30 kg ha?¹ and SP-36 at 125 kg ha?¹, which optimally enhanced P dynamics and chili yields. AHL was proven to reduce the need for inorganic P fertilizer by up to 50% without compromising chili yield or quality. These findings indicate that AHL has great potential to be developed as a locally sourced soil conditioner to support sustainable agriculture and the use of more environmentally friendly low-rank coal.
Phosphate Uptake, Mycorrhiza Colonization and Yield of Soybean on Ultisols Affected by Water Stress and Mycorrhiza Fitriatin, Betty Natalie; Nurbaity, Anne; Suriadikusumah, Abraham
AGROTEK: Jurnal Ilmiah Ilmu Pertanian Vol 10, No 1 (2026): Maret
Publisher : Percetakan Umi Toaha Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33096/agrotek.v10i1.1176

Abstract

Mycorrhizal symbiosis can enhance nutrient uptake, especially phosphorus, by plants and increase plants’ drought resistance as well.  An experiment was set up to investigate the effects of water stress and mycorrhizal inoculation on phosphate uptake, mycorrhizal colonization, growth, and the yield of soybean.  The experiment design used was Factorial Randomized Block, which consisted of two factors. The first factor was water stress, which consisted of three levels, i.e., 100 % field capacity; 75 % field capacity, and 50 % field capacity.  The second factor was mycorrhiza, which consisted of three levels, i.e., without mycorrhizal inoculation, 10, and 20 g of mycorrhizal inoculant.  The experiment consisted of two units with three replications; the first unit was harvested at the end of the vegetative period to observe plant uptake of phosphorus, percentage of mycorrhizal infection, and dry weight of soybean, and the second unit was harvested at the end of the generative period to find out the yield of soybean. The results of this experiment showed that there was no interaction effect between water stress and mycorrhizal inoculation on plant uptake of phosphorus,  percentage of mycorrhizal infection, dry weight, and yield of soybean.  Water stress decreased phosphate uptake,  percentage of mycorrhizal infection, dry weight, and yield of soybean. Mycorrhizal inoculation increased phosphate uptake and the percentage of mycorrhizal infection.
Co-Authors A.M. Kalay Abraham Suriadikusumah Ade Ismail Agung Karuniawan Amin Mbusango Anne Nuraini Anni Yuniarti Arafah, Mayang Sunduz Asmiran, Priyanka Atih Winingsih BAIQ AZIZAH HARYANTINI Baiq Azizah Haryantini Betty Natalie Fitriatin Citra Bakti, Citra Dedi Nursyamsi Derisfha Anggraeni Diyan Herdiyantoro Djuansah, Muhamad Rahman Dristiarini, Raia Zaviera Eleonora Agustine Emma Trinurani Sofyan Erni Suminar Glenn Christopher Uratel Gordon Pius Marihot Gordon Pius Marihot Pius Marihot Haryantini, Baiq Azizah Hermawan, Mega Kartika Hidayat Salim Indra Permana Irwandhi, Irwandhi Jajang Sauman Hamdani Kati Syamsudin Kadang Tola Khumairah, Fiqriah Hanum Kiki Zakiah Kusumah, Fajar Maulana Wijaya Mayang Sunduz Arafah Meddy Rachmady Merry Prafithriasari Mieke Rochimi Setiawati Muhammad Aldino Rahman Muhammad Iqbal Maulana Yusuf Muryani, Oviyanti Nadia Nuraniya Kamaluddin Noor Istifadah Nurullita Fitri Qurnia Oviyanti Mulyani Oviyanti Muryani Parlinah, Linlin Pujawati Suryatmana Rachelita, Nadia Ratna Ningsi Reginawanti Hindersah Reza Septianugraha Ridha Hudaya Ridha Hudaya Rija Sudirja Rudianto, Safira Damayanti Saputra, Yondra Septianugraha, Reza Setiawati, Mieke Richimi Shakina, Visira Deva Solihin, Amir Sungkono Sungkono Tarra Martiana Dewi Toto Sunarto Tualar Simarmata Uratel, Glenn Christopher Windy Amorita yeti kartika Yondra Saputra Yosef Edwin Gunawan Situmorang Yosef Situmorang