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All Journal Jurnal Ilmu-Ilmu Pertanian Indonesia Jurnal Agronomi Tanaman Tropika (JUATIKA)
Purwadi
Universitas Pembangunan Nasional “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry

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PENGARUH KOMBINASI MEDIA TANAM TERHADAP SIFAT FISIK TANAH DAN PERAKARAN BEBERAPA MACAM BIBIT PORANG (Amorphophallus oncophyllus Prain) Seruni Atyra Kinanti; Purwadi; Bakti Wisnu Widjajani
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 25 No 2 (2023)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.25.2.91-99

Abstract

[PHYSICO-CHEMICAL CHARACTERISTICS OF SOIL-COMPOST MIXTURES AS ROOTING MEDIA FOR ELEPHANT FOOT YAM (Amorphophallus oncophyllus Prain)]. Tuber crops such as elephant foot yam have specific demands on the structure of growing media especially in terms of their physical and chemical characters due to the small rooting volume. Therefore, the objective of this study was to determine the interactive effects of seed materials and different proportions of soil-compost mixtures on their physico-chemical properties and root growth of elephant foot yam. This pot trial was conducted from July 2022 to March 2023 in coffee and sengon plantation located in Sumberejo Village, Purwosari, Pasuruan, East Java. Treatments were arranged in a factorial scheme using a Completely Randomized Design (CRD) with two factors and three repetitions. The factors included three types of seed materials, i.e., true seed, tuber, and bulbil for the first factor and five different proportions of soil-compost mixtures (w/w), i.e., 100% soil, 66.7% soil+33.3% compost, 50% soil+50% compost, 33.3% soil+66.7% compost, and 100% compost. Results showed that the interactive effects of the two treatments on the observed variables were not significantly different (p>0.05). Treatment of mixture of 2 kg soil and 4 kg compost (33.3% soil+66.7% compost) produced clayey soil texture with 1.12 g/cm3 for bulk density, 2.26 g/cm3 for specific gravity, 59.34% for soil porosity, and 38,55% for moisture content at field capacity. The bulbil type seed produced a better root growth than the other seeds
Bioaccumulation of Water Spinach (Ipomoea reptans Poir) in Phytoremediation of Heavy Metal Cu in Soil Contaminated by Lapindo Mud and Its Impact on Plant Growth Zulfahnur Abi Abdillah; Purwadi; Moch Arifin
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 1 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 1 January 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i1.4820

Abstract

Lapindo mud (LL) contains various heavy metals, including copper (Cu), with concentrations exceeding environmental quality standards, thereby posing a risk of soil and ecosystem contamination. One effective method to mitigate this pollution is phytoremediation using hyperaccumulator plants. This study aims to (1) assess the effect of mixing Lapindo mud with soil on Cu levels in the planting medium and (2) determine the optimal planting medium composition for Cu uptake by land spinach (Ipomoea reptans Poir). The experiment involved four planting medium treatments: 100% mud, soil:mud = 1:1, soil:mud = 1:2, and soil:mud = 1:3, each weighing 600 grams per polybag. Plants were harvested at 10 and 20 days after planting, and Cu levels in the soil and plants, bioaccumulation, and growth parameters such as plant height and dry weight were analyzed. Data were subjected to ANOVA at a 5% significance level, followed by the Least Significant Difference (LSD) test. Results indicated that mixing Lapindo mud with soil reduced Cu content in the planting medium, with the lowest Cu concentration in the 1:1 soil:mud treatment (25 ppm) and the highest in the 1:3 treatment (29 ppm). The 1:1 treatment also resulted in the highest Cu uptake (10.17 ppm) and a bioaccumulation index of 0.40, identifying it as the most effective composition for Cu phytoremediation. These findings highlight the potential of land spinach as a phytoremediator to reduce Cu pollution in soils contaminated with Lapindo mud.
Co-Authors Bakti Wisnu Widjajani Moch Arifin Seruni Atyra Kinanti Zulfahnur Abi Abdillah