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All Journal Journal of Tropical Soils JTSL (Jurnal Tanah dan Sumberdaya Lahan)
Alayya, Nahdlia Putri
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Agriculture, Biological Sciences & Forestry Environmental Science

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Flux of Nutrient Leaching from Ultisol of Pineapple Plantation Ameliorated with FABA and Compost and Its Implications on Fertilizer Management Alayya, Nahdlia Putri; Iskandar, Iskandar; Sudadi, Untung
JOURNAL OF TROPICAL SOILS Vol. 31 No. 1: January 2026 (In Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i1.%p

Abstract

ABSTRACTUltisol is a weathered tropical soil order with low fertility status. It is also prone to nutrient leaching processes. Plantation area of PT. Great Giant Pineapple (PT GGP), which is dominated by Ultisol, has been intensively cultivated for pineapple in rotation with banana and cassava for decades.  This study aims to evaluate the effects of FABA+compost amelioration on nutrient leaching from Ultisol of PT GGP area and its fertilizer management implications. A nutrient leaching simulation through percolation experimentation had been conducted using soil samples of 0-20 cm layer taken from the pineapple-cultivated field plots 9 months after the treatment application or one month before the plant regenerative-phase forcing step was done. Percolations were done every 7 days with 170 mL aquadest 0,75 kg-1 soil for 35 days experimental period, which was equivalent to the monthly-average of the six wet-months’ rainfall in the study area. The amelioration evaluated reduced significantly the soil nutrients leached in terms of tmax, total flux, and flux proportion. The band-application of 25 ton.ha-1 FABA+compost gave the best results. The NO3 and K leaching flux proportions, however, were still high. It is suggested to consider the use of controlled release fertilizers to reduce the nutrient leaching flux.Keywords: fertilizer management, flux proportion, percolation, total flux, tmax
SOIL FAUNAL DIVERSITY AS A BIOINDICATOR OF SOIL HEALTH ACROSS DIFFERENT LAND-USE TYPES Juliano, Gian; Mahardika, Rabbirl Yarham; Hidayah, Anggraeni Nur; Mardhiah, Mira; Alayya, Nahdlia Putri; Prayudi, Haikal Caesa; Putri, Elsa Kumala; Sulistiyawati, Dita; Dirman; Sagala, Mariyetha; Gusviani, Nisa Azzahra
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 1 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.1.13

Abstract

This study examines soil mesofauna and macrofauna as bioindicators of soil health and ecological integrity across three land-use systems: oil palm plantations, open lands, and bamboo forests. Land-use change increasingly threatens soil biodiversity and ecosystem functioning in tropical regions, where soil organisms are key to nutrient cycling, aggregation, and ecological resilience. Understanding how land use influences soil faunal communities is crucial for assessing belowground integrity. Despite their critical ecological roles, soil faunal indicators are rarely integrated into soil health assessments in tropical systems. Addressing this gap, this study compares soil mesofauna and macrofauna diversity across contrasting land uses to establish their potential as reliable bioindicators. Soil samples were collected from the surface layer (0–10 cm) using standardized coring under uniform topography, soil type, and climate. Systematic random sampling was applied, with mesofauna extracted using Berlese-Tullgren funnels and macrofauna extracted by manual hand-sorting following the TSBF method. Specimens were identified to the order level. Shannon-Wiener analysis showed that bamboo forests supported the most complex and functionally rich communities (mesofauna H′ = 1.498; macrofauna H′ = 0.309), followed by oil palm plantations and open lands. Acari and Collembola were dominant mesofauna sensitive to habitat quality, while Formicidae and Diplopoda reflected higher trophic and structural roles. Open lands exhibited low diversity and dominance of stress-tolerant taxa, indicating reduced ecological function. The integrated assessment of mesofauna and macrofauna provides a robust framework for evaluating soil health, highlighting vegetation complexity as a driver of nutrient cycling, aggregation, and microbial activity.
Co-Authors Dirman Gian Juliano Gusviani, Nisa Azzahra Hidayah, Anggraeni Nur Iskandar Iskandar Mahardika, Rabbirl Yarham Mardhiah, Mira Prayudi, Haikal Caesa Putri, Elsa Kumala Sagala, Mariyetha Sulistiyawati, Dita Untung Sudadi