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The Function of Bio-invigoration Based on Rhizobacteria in Promoting Shallot (Allium cepa L.) Growth in Saline Soil Ni Wayan Hesthin; Gusti Ayu Kade Sutariati; Tresjia Corina Rakian; I Kadek Pande Prasetia; Jendri Mamangkey
International Journal of Science and Environment (IJSE) Vol. 6 No. 2 (2026): May 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i2.473

Abstract

Shallots are an important commodity whose productivity is often constrained by the use of low-vigor seeds and saline soil conditions. This study aimed to examine the effect of seed bio-invigoration using rhizobacteria and the composition of saline soil media on shallot growth. The study employed a randomized block design with two factors, namely bio-invigoration (no treatment, KLK 05 isolate, and KNU 13 isolate) and saline soil media composition (100%, 75%, 50%, and 25% combined with organic fertilizer). The observed variables included plant height, number of leaves, number of tillers, leaf area, and root length. The results showed that bio-invigoration and the addition of organic fertilizer significantly improved plant growth. The combination of rhizobacteria with moderate to low salinity media produced the best results through increased nutrient uptake, ion balance, and vegetative growth. Therefore, bio-invigoration and organic fertilizer have the potential to be effective strategies for improving shallot growth in saline soils.
PEMBERDAYAKAN MASYARAKAT DESA AUNUPE DALAM PENGELOLAAN HAMA DAN PENYAKIT TANAMAN YANG RAMAH LINGKUNGAN Andi Khaeruni; Rahayu Rahayu; Gusti Ayu Kade Sutariati; Tresjia C. Rakian
Jurnal Hilirisasi IPTEKS Vol. 3 No. 1 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i1.382

Abstract

Aunupe Village, Wolasi District is one of the villages for the development of organic vegetables in Konawe Selatan Regency. The frequent occurrence of high levels of pest and disease attacks is the main reason for the use of synthetic pesticides that are not justified in organic farming systems. On the other hand, in the same location, there is a group of women farmers who are not productive. Both of these problems can be overcome if the farmer women's group produces quality biological agents that can be utilized by horticultural farmers in an environmentally friendly cultivation system. The implementation of the PKM Program in Aunupe Village is very appropriate as a means and media for transferring technology on how to increase the productivity of environmentally friendly vegetable plants by developing organic farming techniques. Control of pests and plant diseases by using biological agents and botanical pesticides is a wise choice in efforts to increase agricultural production with high economic value while maintaining biodiversity to support sustainable agricultural cultivation, especially in the cultivation of vegetable crops as a source of community nutrition.
Growth of Sweet Corn (Zea mays saccharata (Sturt.) Bailey) and Weed Density With Different of Fertilizer’S Doses Halim Halim; Tresjia Corina Rakian; Rachmawati Hasid; Resman Resman; Waode Siti Anima Hisein
Jurnal Biodjati Vol 5 No 2 (2020): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v5i2.9050

Abstract

 This study aimed to determine the response of the growth of sweet corn plants and weed density to the treatment of bio-fertilizer based on arbuscular mycorrhizal fungi and cow manure fertilizer. The study was conducted using a randomized complete block design (RCBD) in a factorial pattern. The first factor was arbuscular mycorrhiza fungi (AMF) consisting of four doses, namely without AMF (A0), AMF 5 g/planting hole (A1), AMF 10 g/planting hole (A2), AMF 15 g/ planting hole (A3). The second factor was cow manure fertilizer con-sisting of three doses, namely without cow manure fertilizer (B0), cow manure fertilizer 3 kg/plot (B1), cow manure fertilizer 6 kg/plot (B2). The treatment applied consisted of 12 combinations of treatments with 3 replications, so there were 36 experimental units. The observed variables were plant height, stem diameter, leaf area and weed density. The results showed that the average height of sweet corn was best at 42 DAP in the treatment of cow manure fertilizer 6 kg/plot (B2) as 111.6 cm. The average highest of stems diameter was at 14 DAP in the treatment of cow manure fertilizer 6 kg/plot (B2) as 0.40 cm. The average leaf area of sweet corn was at the age of 28 DAP was highest in the combination treatments cow manure fertilizer 6 kg/ plot (A0B2) and without AMF as 894.5. The weed species with the highest density found was I.cylindrica as 0.5-32.4%, C. kyllingia as 1.3-41.8%, C. rotundus as 1.3-30.3% and F.miliaceae as 1.2-12.7%. 
Soil biological quality in rhizosphere, growth, and yield of upland rice grown on acid soil after amended biochar enriched sap of Kappaphycus alvarezii TRESJIA CORINA RAKIAN; LAODE MUHAMMAD HARJONI KILOWASID; LA ODE AFA; ARDISTA RISKYANA; NURAZIZAH NURAZIZAH; YUSLITA WIJAYANTI; ANDI BAHRUN; IMRAN SUBAIR; NINI MILA RAHNI; SYAMSU ALAM; SARAWA SARAWA; LA KARIMUNA
Biodiversitas Journal of Biological Diversity Vol. 24 No. 12 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d241241

Abstract

Abstract. Rakian TC, Kilowasid LMH, Afa LO, Riskyana A, Nurazizah, Wijayanti Y, Bahrun A, Subair I, Rahni NM, Alam S, Sarawa, Karimuna L. 2023. Soil biological quality in rhizosphere, growth, and yield of upland rice grown on acid soil after amended biochar enriched sap of Kappaphycus alvarezii. Biodiversitas 24: 6780-6792. Biological soil quality is essential in evaluating soil management practices using biochar enriched for upland rice growth on acid soil. Therefore, the study aimed to (i) analyze the effect of biochar-enriched sap of Kappaphycus alvarezii (K-sap) on the abundance of Arbuscular Mycorrhizae Fungi (AMF), bacteria, and protozoa in rhizosphere soil, growth, and yield of upland rice, and (ii) the relationship between the abundance of soil biota and the growth and yield components, as well as straw N, P, and K content on acid soil. Four upland rice were grown on acid soil incubated with biochar-enriched sap for two weeks in pots. Nine treatments of the biochar-enriched sap were tested, namely control, 5% biochar-0% K-sap, 5% biochar-5% K-sap, 5% biochar -10% K-sap, 5% biochar-15% K-sap, 7.5% biochar-0% K-sap, 7.5% biochar-5% K-sap, 7.5% biochar-10% K-sap, and 7.5% biochar-15% K-sap. Each treatment was three replicates in a randomized block design. The results demonstrated that the AMF spores quantity decreased while flagellates increased in the soil rhizosphere. The P and K content increased, the N:P decreased, and P:K ratio varied in the straw of the upland rice. Plant height and total spikelets increased, while root dry weight and roots to shoots ratio (R:S) decreased with biochar enriched. The abundance of AMF spores and flagellates correlated positively and negatively with R:S. Furthermore, R:S was negatively correlated with plant height and total spikelets. Plant height and total spikelets showed a positive correlation, while root dry weight and R:S was negatively correlated with K content in shoot tissue. The P and K contents with N:P ratio and N:P with P:K were negatively correlated. In conclusion, biochar-enriched K-sap effectively regulated the activity and composition of soil biota in the rhizosphere, influencing upland rice's growth, yield, and nutrient balance uptake on acid soils.
Soil invertebrates in an Ultisol soybean agroecosystem amended with urea-enriched cogongrass biochar prepared with Sargassum extract LAODE MUHAMMAD HARJONI KILOWASID; AL’ADLIN AL’ADLIN; SYAMSU ALAM; TRESJIA CORINA RAKIAN; NINI MILA RAHNI; ROBIATUL ADAWIYAH
Biodiversitas Journal of Biological Diversity Vol. 27 No. 1 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270116

Abstract

Abstract. Kilowasid LMH, Al’adlin, Alam S, Rakian TC, Rahni NM, Adawiyah R. 2026. Soil invertebrates in an Ultisol soybean agroecosystem amended with urea-enriched cogongrass biochar prepared with Sargassum extract. Biodiversitas 27 (1): d270116. https://doi.org/10.13057/biodiv/d270116. Soil invertebrates are widely used as bioindicators to assess changes in ecological functioning under different management practices. However, information on the influence of enriched biochar amendments on the community of invertebrates in tropical Ultisol remains limited, particularly in the context of reducing dependency on synthetic fertilizer through organic-based management. Therefore, this study aimed to evaluate the interactive effects of cogongrass (Imperata cylindrica) biochar doses and urea concentrations dissolved in Sargassum seaweed extract on the abundance and diversity of soil invertebrates in an Ultisol-based soybean agroecosystem. A split-plot experiment was conducted using three biochar doses (0, 5, and 10 t ha⁻¹) and four urea solution concentrations (0, 5, 10, and 20%) as main plots and subplots, respectively. Soil-surface invertebrates were collected using pitfall traps, while soil-living invertebrates were sampled through hand-sorting and monolith methods, and identified at the family level. The results showed that biochar and urea amendments significantly restructured the community of soil invertebrates, with contrasting responses between soil-surface and soil-living groups. Biochar dose primarily influenced surface-active invertebrates, and urea concentration affected specific soil-living taxa, with interaction effects observed for selected functional groups. Higher biochar doses increased community diversity, as reflected by higher Shannon-Wiener and lower Simpson indices, while moderate urea concentrations supported the highest taxon richness. Optimized biochar-urea combinations enhanced the abundance of predatory invertebrates, particularly ants (Formicidae), without reducing overall taxonomic diversity. These findings show that urea-enriched cogongrass biochar prepared with Sargassum extract can improve soil ecological functioning through beneficial restructuring of the community of invertebrates, supporting its potential role in sustainable nutrient management and biodiversity-based restoration of degraded tropical Ultisol agroecosystem.
Effectiveness of Seed Biopriming Using Indigenous Rhizobacteria From The Rhizosphere of Upland Rice In Improving The Growth of Local Upland Rice On Ultisol Soil La Ode Safuan; Gusti Ayu Kade Sutariati; Abdul Madiki; Muhidin; Tresjia Corina Rakian; I Made Widana Arsana; I Kadek Pande Prasetia Wiguna; Vit Neru Satrah; Arga Wiradama
International Journal of Science and Environment (IJSE) Vol. 6 No. 3 (2026): August 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i3.771

Abstract

Ultisol soils are widely distributed in Southeast Sulawesi and are characterized by low fertility, acidic pH, low organic matter content, and limited availability of essential nutrients. These constraints contribute to the low productivity of local upland rice and require sustainable technologies that can improve plant growth with lower dependence on synthetic inputs. This study aimed to evaluate the effectiveness of seed biopriming using indigenous rhizobacterial isolates from the rhizosphere of upland rice on the growth of local upland rice cultivated on Ultisol soil. The experiment was arranged in a randomized block design consisting of ten treatments: nine rhizobacterial isolates, namely KNW01, KNW03, KNW05, KNW09, KNW12, BTN15, KNS8, MN06, and BMB01, and a non-inoculated control. Each treatment was replicated three times. The observed variables included plant height, number of leaves, leaf area, number of tillers, root length, plant dry weight, and relative growth rate. The results showed that seed biopriming with indigenous rhizobacteria improved the growth performance of upland rice compared with the control. Isolate KNW05 consistently produced the best response across most growth variables, including plant height of 120.7 cm, leaf area of 1,622 cm², root length of 37.9 cm, plant dry weight of 24.3 g, and relative growth rate of 2.5 g/g/week. KNW05 also increased the number of tillers by 87% compared with the control. These findings indicate that indigenous rhizobacteria, particularly isolate KNW05, have potential as biofertilizer candidates to support sustainable upland rice cultivation on Ultisol soil.