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Jurnal Lahan Suboptimal
Published by Universitas Sriwijaya
ISSN : 22526188     EISSN : 23023015     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Lahan Suboptimal: Journal of Suboptimal Lands (JLSO) (p-ISSN 2252-6188; e-ISSN 2302-3015) publishes original research papers, literature reviews, and short communications that cover on topics relevant to suboptimal lands: freshwater swamps, tidal lowlands, peatlands, dry and dry acid lands, shaded ecosystem, ex-mined lands, saline and marine coastal wetland ecosystems. The Journal serves as a multi-disciplinary forum covering key issues in Suboptimal Lands science and technology, management, policy and ecological economics. The journal is published by Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO), Universitas Sriwijaya. The journal was first published on April of 2012 with twice per year in frequency on April and October.
Arjuna Subject : -
Articles 669 Documents
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Biology and management of the insect pest threatens global maize production, fall armyworm, Spodoptera frugiperda: an Africa and Asia perspective Ibrahim Sani; Mohammed Suleiman; Abubakar Samaila; Abbati Nasiru; Kabir Abdullahi Bindawa; Aminu Musa; Zakariya Sani
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.14.2.2025.732

Abstract

Fall armyworms, Spodoptera frugiperda (J./E. Smith) are among the most serious insect pests in maize and many other crops, particularly in some Asian countries and sub-Saharan Africa. The study aimed to explores the significance of the biological characters and the management strategies to reduce damage caused by FAW. Understanding this destructive insect pest will guide maize growers and agricultural professionals to develop the most effective and sustainable FAW control methods. The caterpillar fed on the leaves and interferes with pollination and fertilization processes, significantly reducing the yield losses in maize, which was one of the main staple food for most smallholder farmers in Africa. Due to their immediate action, synthetic chemical pesticides were the most conventionally used in the control of FAW, even though this method had many weaknesses, including environmental pollution, food safety concerns, insecticide resistance, and effects on non-target organisms. In recent years, biological control agents (BCAs) have been developed as an alternative to the conventional use of chemical pesticides in integrated pest management (IPM) systems of FAW pests. The present BCAs of FAW were parasitoids, predators, and entomopathogens.
Liquid organic fertilizer concentration of pineapple peel on the growth and production of black potato, Plectranthus rotundifolius (poir.) Spreng Nurlaila Nurlaila; Firdaus Sulaiman
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.14.2.2025.737

Abstract

The research aimed to determine the effect of applying liquid organic fertilizer from pineapple peel on the growth of black potato, Plectranthus rotudifolius (poir) Spreng. In this research the method used was Randomized Block Design (RBD) method with six treatment levels, each treatment repeated four times across four blocks, resulting in 24 experimental units. In this study, six treatments were applied, consisting of various concentrations of liquid organic fertilizer from pineapple peel P0 = no treatment, P1= 10%, P2= 15%, P3= 20%, P4= 25% and P5= 30. The research used manure and NPK fertilizer as basic fertilizer in soil planting media. The results showed that the application of pineapple peel had a significant effect on the growth parameters of black potatoes, especially on root fresh weight, shoot fresh weight and tuber volume, treatment P4 (25%) produced the highest shoot fresh weight, average 535.75 g, while P2 the lowest average was 332.25 g, the highest fresh root weight was 18.25 g, while the lowest P1 was 10.75 g and tuber volume had a significant effect on treatment P2 (15%) producing the highest volume namely 4.89 g, while the lowest was 4.10 g. The application of 15% pineapple peel liquid organic fertilizer significantly increased crown fresh weight, root fresh weight, and tuber volume of black potato, while having no significant effect on other growth parameters.
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.
Growth and yield response of lettuce (Lactuca sativa L.) planted floatingly to optimization of NPK compound fertilizer Delly Salsabila Amanda; Rahmat Hidayatulah; Susilawati Susilawati
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.14.2.2025.741

Abstract

Urban agriculture had expanded rapidly in response to growing population pressures and climate change, especially in densely populated areas of developed countries. South Sumatra holds significant potential for developing floating agricultural systems. This study aimed to evaluate the effects of compound NPK fertilizer and a floating planting system on lettuce growth. A Randomized Block Design (RBD) with four treatment levels was used. Each treatment was repeated 3 times, resulting in 12 treatment units. In the treatment of NPK compound fertilizer doses, P0 = Control, P1 = 1.12 g NPK compound/polybag, P2 = 2.24 g NPK compound/polybag, P3 = 3.36 g NPK compound/polybag. The observation results were analyzed using analysis of variance and the DMRT 5% test. The parameters observed include plant height, number of leaves, fresh weight of the plant, fresh weight of the roots, dry weight of the roots, root length, leaf greenness level, leaf area, and canopy area. Based on the research findings, the application of compound NPK fertilizer at a rate of 2.24 g/polybag (P2) resulted in the most favorable growth and yield performance of floating lettuce, as it consistently produced the highest mean values across all observed parameters. However, the calculated optimum dosage was 2.05 g/polybag. This rate is therefore recommended as the optimal application dose for subsequent studies.
Diversity and role of insects on vegetation around sugar palm (Arenga pinnata) plants in Tanjung Miring Village, Muara Enim Regency Dhiva Kinanti Diadara; Weri Herlin
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.14.2.2025.745

Abstract

Arenga pinnata (sugar palm) was a crop of high ecological, economic, and social in South Sumatra, particularly in Muara Enim Regency. Despite its importance, limited scientific information regarding the diversity and ecological functions of insect communities associated with this species. This study aimed to identify and classify insect taxa specifically decomposers, phytophagous, pollinators, and natural enemies found in and around sugar palm stands in Tanjung Miring Village. Field observations were conducted using purposive sampling, and insect specimens were collected through four established methods: yellow sticky traps, pitfall traps, sweep nets, and manual hand collection. A total of 850 insect individuals were recorded, with the greatest abundance observed on trees possessing trunk diameters between 31‒40 cm. Hymenoptera was the most frequently encountered order, with Monomorium minimum identified as the most dominant species. Among the collection methods, yellow sticky traps yielded the highest number of individuals. Biodiversity analysis revealed a Shannon-Wiener index (H′) of 2.47, indicating moderate diversity. The evenness index (E) was 0.73, suggesting relatively low species distribution uniformity, while the dominance index (D) was 0.13, implying the absence of a single dominant species within the community. Statistical analysis using NCSS software demonstrated a significant effect of trap type on insect abundance, but no significant differences were found based on insect order, tree diameter, or observation period. These findings underscore the ecological importance of insect diversity in sugar palm ecosystems, as various functional groups such as pollinators, herbivores, and decomposers play vital roles in supporting the growth, productivity, and sustainability.
Diversity insect in the Vegetative Phase of Arenga pinnata (wurmb) merr. in Tanjung Miring Village, Muara Enim Riko Firmanto; Weri Herlin; Yulia Pujiastuti
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.14.2.2025.746

Abstract

One of the factors that support the growth of sugar palm plants was the presence of insects that indirectly play an important role in the ecosystem of these plants. The study aimed to determine the abundance, diversity, and role of insects associated with young sugar palm plants (vegetative) in Tanjung Miring Village. The method used was purposive random sampling by setting yellow sticky traps and pitfall traps. Data collection techniques were obtained through direct observation in the field by setting two traps and interviews with sugar palm plant farmers using a questionnaire. The results showed that there were 21 insect species belonging to 18 families from 8 orders. Three important insect groups consisted of 9 types of pollinating insects, 7 types of herbivorous insects, and 5 types of decomposing insects. The abundance of pollinating and decomposing insects was dominated by the orders Hymenoptera and Diptera with a total of 338 individuals. The highest insect species diversity was found in the yellow trap with 13 species and a Shannon-Wiener diversity index (H') of 2.17. While pitfall traps, only 8 species of insects were found with an H' value of 1.43. The high diversity and abundance of yellow traps showed the dominance of active flying insects, especially pollinators, with the highest relative abundance (Di=2.43). The complex ecosystem of the sugar palm groves is an important habitat for various insects with complementary ecosystem functions.
Antibacterial activity of ginger essential oil derived nanobactericide against the growth of phytopathogenic bacteria - A Review Mahesh Tiran Gunasena; Khairulmazmi Bin Ahmad; Mohd Zobir B Hussein; Asgar Ali; Mohd Zobir Syazwan Afif; Mohd Aswad bin Abdul Wahab
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (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.14.1.2025.750

Abstract

Phytopathogenic bacteria infect various plants, causing economic losses, negative environmental consequences, and harming agricultural development. The most currently available antimicrobial agents for agriculture were potentially toxic, non-biodegradable, and cause significant harm to the ecosystem. As a result, novel, effective, safe, user-friendly, and alternative methods were urgently needed. Essential oils (EOs) have great potential in managing plant bacterial diseases because they successfully destroy various pathogenic bacteria. Ginger essential oil (GEO) is more widely used because it contains a diverse mixture of volatile substances, such as phenolic compounds, terpenes, polysaccharides, lipids, and organic acids. The antibacterial activity of the EO against phytopathogenic bacteria is significantly improved when it is converted into nanoparticles. Nanoparticles (NPs) that were derived from EOs have a considerable antibacterial action resulting from increased chemical solubility and consistency, minimal rapid evaporation, and slow depletion of the effective substances of EO. Ginger EOs were encapsulated in chitosan as a nanogel to improve the antibacterial effects and the consistency of the oils against pathogenic bacteria. Nanogel had been shown to amplify the antibacterial effect of EOs against pathogenic bacteria by enhancing their potential to disturb the integrity and permeability of the cell membranes. This paper focuses on three major parts of ginger essential oils: the antibacterial efficacy to control plant pathogenic bacteria, the possible mechanisms of action of essential oils as nanobactericides, and more importantly, the fabrication of bactericide nanoformulation.
Response of soil physics properties to liquid organic fertilizer from liquid waste from tofu factories and banana tubers in ultisol Siti Nurul Aidil Fitri; Adipati Napoleon; Bakri Bakri; Agus Hermawan; Alfarezi Athallah
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.14.2.2025.760

Abstract

Productivity in ultisols was not only determined by mineral content, but was also influenced by the physical properties of the soil. Soil physical properties were soil properties that were determined by its constituent materials such as water content, bulk density, total pore space and permeability. The study aimed to determine the effect of the application of liquid organic fertilizer from tofu factory liquid waste on the physical properties of soil in ultisols. This research was designed using a Completely Randomized Design (CRD) with six treatment levels (control treatment, single fertilizers N, P, and K as recommended doses, 125 ml,  250 ml, 375 ml and 500 ml Liquid Organic Fertilizer (LOF) from tofu factory wastewater and banana tubers. Each treatment was repeated 4 times, so there were 24 experimental units. The results showed that LOF treatment had a significant effect on bulk density, total pore space, and permeability and had no significant effect on moisture content in field capacity of green mustard plants in ultisols. The highest value obtained in the LOF treatment is at a dose of 250 ml which had a field capacity water content value of 29.63%, bulk density 0.95 g/cm3, total pore space of 64.00% and soil permeability of 11.56 cm/hour.

Page 67 of 67 | Total Record : 669

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