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Akta Agrosia
Published by Universitas Bengkulu
ISSN : 14103354     EISSN : 26157136     DOI : https://doi.org/10.31186/aa
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Akta Agrosia is dedicated to researchers or academics who intent on publishing research, scientific thinking, or other scientific ideas. The articles published in the Akta Agrosia are the author’s original works covering on Crop Production, Crop Physiology, Pest and Disease, Soil Science, Agronomy, Plant Genetics, Plant Breeding, Plant Biotechnology. Akta Agrosia is published by the Department of Crop Production, Faculty of Agriculture, University of Bengkulu, biennially in June and December. ISSN:1410-3354 (printed media) and eISSN: 2615-7136 (online media).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 137 Documents
 10   11   12   13   14 
The Use of Three Techniques to Control the Pest of “Walang Sangit” (Leptocorisa oratorius F.) on White Glutinous Rice (Oryza sativa L. var glutinosa) Ikhwan, Muhammad Awwalul; Siregar, Ameilia Zuliyanti
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

“Walang sangit” (Leptocorisa oratorius) is important pest of paddy rice plantation during generative phase. The objective of this experiment was to determine the  use of three techniques to control the pests L.oratorius on white sticky rice plants at Harmonika Baru, Padang Bulan Selayang II, Medan Selayang District, Medan. The insects collected were identified at the Pest Laboratory, Faculty of Agriculture, University of Sumatra Utara from May to October 2023. This experiment used purposive sampling method with 3 types of treatments, including: application of golden snail carcass traps, papaya leaf extract, and used of  Beauveria bassiana. The results showed that the insects caught in the three treatments had the same number of orders and families (5 Orders and 19 families) with 2593 individuals with application of golden snail carcass trap,743 individuals by application of papaya leaf extract, and 528 individuals by spraying of Beauveria bassiana. The score calculation of AD1 were 2.593 individual while  AF1 were 359; AD2 were 743, AF2 were 138; AD3 were 528 individuals, AF3 were 137 individuals. The Richness index (R) was 7.57 (R1),  7.67 (R2), and 2.64 (R3). The  evenness index (E) was E1 = 0.80, E2 = 0.80,  and E3 = 0.75. The  dominance index (C) was 1 for three treatments, while insect diversity index (H’):H’1=2.48; H’2=2.64; H’3=2.70.We concluded that the application of golden snail carcass traps was the best treatment. Three types of insect function status were identified are herbivores, predators and scavengers. Keywords: Beauveria bassiana, carcass trap, papaya leaf, white sticky rice 
The Growth Responses of Shallot (Allium cepa L.) Toward Different Levels of Salt Stress Kurniawan, Andi; Rahmandhias, Deris Trian; Noviandi, Widi Dwi
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.45-51

Abstract

Shallot (Allium cepa L.) is an annual Liliaceae family plant and a major horticultural commodity globally. As a crucial horticultural product, market demand for shallots tends to increase. However, global climate change causes saline land areas to increase. Salt stress is one of the leading challenges limiting yield worldwide. This study aims to understand the impact of salt stress on the growth of shallots and their stress tolerance limits. This research was conducted from August to October 2023 in Wonorejo Village, Poncokusumo District, Malang Regency. The plant material used in this study was the Tajuk variety of shallots. This study used a Randomized Block Design (RBD) with four salinity treatments ( 0, 100, 150, and 200 mM NaCl), each replicated three times. Variables observed in this study include plant length, leaf number hill-1, tiller number hill-1, and plant fresh weight hill-1 that were observed at 2, 4, 6, and 8 weeks after planting (WAP). Our results showed that plants treated with 100 mM NaCl decreased plant length, leaves number, tiller number, and plant fresh weight (shoots, roots, and bulbs) by 8 %, 10 %, 8 %, and 12 %, respectively. While at a concentration of 150 mM, the reduction was 14 %, 30 %, 18 %, and 22 %. Furthermore, the highest percentages of decrease of those growth variables, up to 27 %, 42 %, 31 %, and 41 %, respectively, were obtained at 200 mM treatment. These findings may help to understand the morphological and ecological aspects of salt stress in plants and how plants grow and develop under salinity conditions. This study also highlights the importance of further studies on the physiological of shallot on salt stress. This might result in innovative strategies and technology that crops' resilience to salinity, and ensure food security and the sustainability of farming in impacted areas Keywords: shallot, abiotic stress, salinity, plant growth.
Organic Fertilizer Application on Three Varieties of Irrigated Low-land Rice (Oryza sativa L.) Suhadi, Asman; Widodo; Prawito, Priyono; Barchia, Faiz; Sumardi
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.103-110

Abstract

Rice is the main staple in Indonesia and the demand for rice production risees along with population growth. Providing organic fertilizer can overcome fluctuations in rice production by increasing nutrient efficiency and being nutrients availability that contribute crop yield increase. This research was carried out in Kaur Regency, Bengkulu Province in September – December 2023. The objective of this research was to investigate the effect of manure on growth and yield of three varieties of irrigated lowland rice. The first experiment was using a Completely Randomized Block Design (CRBD) with 2 factors. The first factor is 3 types of rice varieties, namely Inpari 48, Inpari 32 and Inpari 38. Meanwhile, the second factor is the type of manure, namely cow manure, goat manure and chicken manure. The results of the research showed that in the first experiment it was concluded that there was no real interaction between rice varieties and manure on rice growth and yield. The best rice variety is Inpari 48 which has better growth and yield compared to Inpari 32 and Inpari 38. The application of chicken manure produces better growth and yield of rice and soil chemical properties and agronomic efficiency compared to cow and goat manure. Keywords: efficiency, organic fertilizer, rice varieties   
Enhancing Nitrogen Use Efficiency, Growth, and Biomass Yield of Pak Choy on Coastal Entisols with a Combination of Reduced Nitrogen Fertilizer and Zeolite-Based Slow-Release Fertilizer Resti , Cynthia; Marwanto; Handajaningsih, Merakati
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.52-63

Abstract

Coastal sandy soil has a low capacity to hold water and nutrients, trigerring high doses of fertilizer application. Therefore, this study aims to determine the optimal mixture of urea and zeolite-based slow-release fertilizers (SRF) that can reduce application of inorganic fertilizer while improving nitrogen use efficiency (NUE), growth dynamics, and yield of pak choy cultivated on coastal Entisols. This research was conducted from October to December 2023 in the Plant and Soil Research field  on the outskirts of the Bengkulu University campus. The treatments used were a combination of urea and SRF, consisting of 0% N-Urea, 100% N-Urea, 75% N-Urea + 25% N-SRF, 50% N-Urea + 50% N-SRF, 25% N-Urea + 75% N-SRF, and 100% N-SRF. The study was set up in a completely randomized design with five replications. The results demonstrated that the treatments enhanced the growth and biomass yield of pak choy, as well as NUE. The combination of 50% N-Urea + 50% N-SRF (equal to 200 kg urea ha-1 + 608.5 kg SRF ha-1) resulted in higher leaf area, fresh shoot weight, dry shoot weight, fresh plant weight, N- uptake, and NUE compared with the application of 100% N-Urea (400 kg urea ha-1). The NUE for the combination of 50% N-Urea + 50% N-SRF was 36.36%, which was 13.63% compared to 100% N-Urea with an NUE of 34.09%. Therefore, using this SRF allows for a reduction in urea requirements by up to 50%.NUE and nitrogen uptake show a very high positive association (r=0.941, p<0.01). Keywords: activated zeolite matrix, , coastal sandy soil, inorganic nitrogen fertilizer, slow- release fertilizer 
Characterization of the Existence of Morphology Endophyte Bacteria of Garlic (Allium sativum L.) with Plant Growth Promoting Rhizobacteria (PGPR) in the Highland Areas Yelni, Gusni; Kasim, Musliar; Hayati, P.K. Dewi; Hervani, Dini
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.64-70

Abstract

Utilization of Plant Growth Promoting Rhizobacteria (PGPR) is a strategy to increase the growth and yield of local garlic varieties. Bacteria contained in PGPR can act as ZPT and as biological fertilizer. This research aimed to determine the characteristics and presence of bacteria on the roots of garlic plants after PGPR application and to see the growth and yield of the best situs garlic varieties in the highlands. Isolation of garlic root endophytic bacteria was taken from applying PGPR in garlic cultivation in the highlands. The experiment used a randomized block design with treatments of Lumbu Putih, Lumbu Kuning, Lumbu Hijau, and Jangkiriah Adro garlic varieties, with 12.5 ml.L-1 of PGPR. Observations included plant height, bulb weight, number of colonies, and macroscopic form of bacteria. The research results showed that the highest number of endophytic bacterial colonies was found in the root isolates of the non-PGPR Lumbu Putih variety, namely 225 colonies. After administering PGPR, the highest number of bacteria was found in Lumbu Kuning root isolates, namely 200 colonies. The morphological characteristics of the bacterial colonies in the six isolates were round, wavy, convex, and raised, jagged edges, raised and flat, and the color was yellowish white. The Jangkiriah Adro variety had the best growth in plant height and bulb weight per plant compared to the Lumbu Putih, Lumbu Kuning, and Lumbu Hijau varieties. Keywords: characterization, colony, endophytic bacteria, garlic varieties, isolation
The Effectiveness of Biochar, Compost, and Natural Phosphate in Improving Soil Quality in Oil Palm Plantations Endriani; Sunarti; Farni, Yulfita; Listyarini , Diah; Fuadi, Najla Anwar
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.71-80

Abstract

Oil palm cultivation is increasingly carried out on suboptimal land, such as Ultisols. Application of ameliorant such as biochar and compost may be chosen as an alternative to solve the problem occurred on this sub optimal soil. This study aims to determine the optimal dosage of a mixture of oil palm empty fruit bunch (EFB) biochar, poultry manure compost, and Rock Phosphate (RP) to enhance soil quality and support the growth of one-year-old oil palm plants. The study was conducted over six months in a one-year-old oil palm plantation located in Panca Mulya Village. A randomized Complete Block Design (RCBD) was employed with the aplication of biochar, compost, and rock phosphate (RP = Togo Rock Phosphate, 33.5% P₂O₅) in the following treatments: P0 = control (no treatment); P1 = biochar 20 tons.ha-1 + RP 200 kg.ha-1; P2 = biochar 10 tons/ha + compost 10 tons.ha-1 + RP 200 kg.ha-1; P3 = compost 20 tons.ha-1 + RP 200 kg.ha-1; P4 = biochar 20 tons.ha-1 +compost 10 tons.ha-1 + RP 200 kg.ha-1; P5= biochar 10 tons.ha-1 + compost 20 tons.ha-1 + RP 200 kg.ha-1. Results indicated that the application of biochar, compost, and RP, whether individually or in combination, enhanced oil palm growth compared to the control. The application of biochar and compost improved soil physical properties, increased soil organic matter content, total pore space, available water content, reduced bulk density, soil penetration resistance, and promoted oil palm growth. The best treatment was found to be 10 tons.ha-1 biochar + 20 tons.ha-1 compost + 200 kg.ha-1 RP. Keywords: ameliorant, empty fruit bunch, soil quality  
The Effects of Vermicompost Dosage Applied at Different Times on the Growth and Yield of Sweet Corn Mayasari, Mutia; Sudjatmiko, Sigit; Pujiwati, Hesti
Akta Agrosia Vol 27 No 2 (2024)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.27.2.95-102

Abstract

The cultivation of sweet corn currently relies on inorganic nutrient inputs, which often lead to excessive use of fertilizers and subsequent land degradation. To address this issue while maintaining land productivity, researchers have explored the application of vermicompost fertilizer, known for its positive impact on soil physical, chemical, and biological properties. The aims of study were to determine the vermicompost fertilizer doses applied at different times to enhance sweet corn growth and yield. The research was arranged in a completely randomized block design with a single factor by combining the doses of vermicompost (50% to 100%) and variations of application times (one to two weeks before planting). Each treatment was replicated three times. The results revealed that the 100% vermicompost applied two weeks before planting showed the highest increased on the plant height, leaf numbers, and the husk cob weight. The application of vermicompost as organic fertilizer on sweet corn cultivation enhanced the productivity of sweet corn.  Keywords: application times, environmental safety, organic farming, sweet corn, vermicompost  
Correlation and Path Analysis for Grain Yield and Its Components of Lowland Rice Grown under Coastland Agroecosystem Aprillia, Rika; Prayoga, Gigih Ibnu; Mustikarini, Eries Dyah
Akta Agrosia Vol 28 No 1 (2025)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.28.1.15-23

Abstract

Growth traits and yield components of rice plants affect yield. The magnitude of this relationship is seen from the correlation value between characters, and the direct and indirect effects are seen  from the cross-fingerprint value. The study aims to determine which characters have a correlation with rice plant yield and their direct and indirect effects. The study was conducted from July 2023 to February 2024. The research location was in the rice fields of SPA Hamlet, Rias Village, Toboali, South Bangka Regency. The study used an experimental method, with a Randomized Complete Block Design (RCBD). The study was divided into 4 experimental blocks. The treatments were 10 superior varieties consisting of 8 inbred varieties (Inpari 32 HDB, Inpari 33, Inpari 42 Agritan GSR, Inpari 49 Jembar, Ciherang, Siliwangi, Padjajaran Agritan, and Cakrabuana Agritan) and 2 hybrid varieties (Mapan P05 and Bridantara 8). Data analysis was using correlation analysis and path analysis with Excel and SPSS applications. The results of the correlation analysis showed that only leaf width correlated with grain dry weight. Leaf width, plant height and number of productive tillers had the highest direct influence on yield. Leaf width characters can be recommended as selection characters in rice breeding. Keywords: correlation, hybrid, path analysis, superior rice    
The Inhibitory Properties of the Single-Chain 2S Albumin Seed Storage Protein from Theobroma cacao Karim, Norzulaiha Abd.; Budiman, Cahyo; Awang, Azwan; Rodrigues, Kenneth F.
Akta Agrosia Vol 28 No 1 (2025)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.28.1.8-14

Abstract

2S albumin seed storage proteins from Theobroma cacao (Tc-2S) are known for their roles in plant defense mechanisms due to their antimicrobial properties. However, it remains unclear whether both the light and heavy chains of Tc-2S are required for this activity. This study develops an expression system for the single-chain precursor of Tc-2S and evaluate its antimicrobial activity. Specifically, the heavy-chain subunit (Tc-9M), corresponding to residues 78 to 150 of the Tc-2S precursor, was cloned and expressed in a heterologous system. The resulting Tc-9M protein, expressed as a fully soluble protein, was purified via column chromatography, yielding 24 mg of pure protein from 300 mL of the expression culture. Antibacterial and antifungal activity was assessed using the Kirby-Bauer disc diffusion method, revealing that Tc-9M remarkably inhibited the growth of several bacterial strains, including Salmonella sp., Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Bacillus cereus. Additionally, Tc-9M inhibited the growth of the yeasts Saccharomyces cerevisiae and Pichia pastoris but showed no activity against the fungus Trichoderma asperellum. These findings ndicate that the single-chain Tc-2S may be sufficient for antimicrobial defense in plants. Because the characterization of the Tc-9M protein has not been previously reported, this work provides a basis for further exploration of the biological significance of the 2S albumin subunit in plant defense.  Keywords: 2S albumin protein, antibacterial, antifungal, heavy-chain peptide, Theobroma cacao  
Growth Responses of Superior Varieties of Rice in South Coast of Kebumen Regency Barokah, Umi; Mulyani, Endang; Nugroho, Rahmat Joko; Sitaresmi, Trias
Akta Agrosia Vol 28 No 1 (2025)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/aa.28.1.1-7

Abstract

The rice plant (Oryza sativa L.) is a staple food source for most people in Indonesia, including those in Kebumen Regency; hence, any decline in rice productivity will impact national food security. A research was carried out to evaluate the growth responses of nine rice varieties under marginal coastal lands in Kebumen Regency. The varieties tested were Inpari 34 Salin Agritan, Inpari 35 Salin Agritan, Inpari Unsoed 79 Agritan, Inpari 47 WBC, IPB 12S, IPB13S, TP-Padi 1, TP-Padi 2, Ciherang, Cilamaya Muncul. Each variety was planted using a square planting system at a distance of 25cm × 25cm, with a plot size of 4m × 5m. Plant growth variables were plant height, number of tillers, root length, root dry weight, shoot dry weight, root/shoot ratio, 50% flowering age and plant lifespan. Paddy varieties grown in South Kebumen coastal area significantly showed different response in plant height, number of tillers, shoot dry weight, 50% flowering age, and plant lifespan. The varieties of IPB 12S, Inpari 47 WBC, and Inpari 34 Salin Agritan have higher growth and flowering performance in coastal  area that might  be have potential to the tolerance to salinity and drought stresses. Keywords: coastal marginal land, drought rice, salinity    

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