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All Journal Jurnal Lahan Suboptimal
Dedik Budianta
Department of Soil Science, Faculty of Agriculture, Universitas Sriwijaya, Indralaya, Ogan Ilir 30662, South Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry

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Cadmium in the roots and leaves of tea (Camellia sinensis L.) at PTPN 7 Pagar Alam unit, South Sumatra, Indonesia Siti Tri Pebriani Daulay; Dedik Budianta
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 2 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.2.2025.739

Abstract

The excessive and intensive application of chemical fertilizers can increase the concentration of heavy metals in the soil. This study aimed to determine Cd deposition in tea roots and leaves using the Detailed Survey method, with sampling points determined using the stratified sampling method, which involves dividing the samples into several age ranges for the plants. The average concentration of Cd in the roots was 0.015 ± 0.004 mg/kg, while in the tea leaves it was 0.010 ± 0.003 mg/kg. The absorption of Cd in tea plant leaves shows the lowest average absorption rate in samples aged 15–25 years, particularly in plants that were 1 year old after production pruning, at 0.005 mg per plant. However, its content remains well below the maximum threshold of cadmium in tea, which was set at 1.0 mg/kg. The age of the plants does not substantially affect the accumulation of Cd in tea leaves; however, tea pruning does affect the accumulation of Cd in the leaves. The research findings indicate that the concentration of Cd in the roots and leaves of tea plants was very low, far below the established Cd threshold, influenced by regular pruning, which results in minimal Cd absorption in the tea leaves. Leaves were considered safe for consumption by humans and animals. Data on the levels of Cd in tea roots and leaves are still rarely found, so it was recommended to further investigate Cd in tea roots and leaves.
Limiting factor for developing soybean under tropical climatic conditions in lowland areas of Tanjung Lago Banyuasin District Fuja Aslamiyah Utami; Momon Sodik Imanudin; Dedik Budianta
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 2 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.2.2025.740

Abstract

Tidal lowlands have a wide distribution in Indonesia and have the potential to support the development of soybean cultivation. However, soybean cultivation in the tidal lowlands often faces various challenges. The study aimed to identify land suitability, limiting factors, and soybean cultivation strategies in tidal lowland type B. This study used a survey method, and sampling points were determined by the purposive sampling method. The research was carried out in several stages, namely preparation, field activities, laboratory analysis, and data analysis. Data analysis was carried out by matching the results of field and laboratory analysis with the requirements for soybean land suitability. The results of the study showed that the research land was moderately suitable for soybean cultivation in terms of the actual land suitability level, namely S3-wa, nr, na, and xs with limiting factors of rainfall, soil pH, C-Organic, K2O, and pyrite depth. While the potential land suitability class could be done by improving irrigation and drainage channels, liming, adding organic matter, fertilization, and regulating the water level with high-level management (++) to potential suitability S1 (very suitable) and for pyrite problems (FeS2) through moderate management (+) with groundwater level control to potential suitability S2 (moderately suitable). Management recommendations that can be applied to soybean cultivation were to regulate planting patterns and micro water management.
Co-Authors Fuja Aslamiyah Utami Momon Sodik Imanudin Siti Tri Pebriani Daulay