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Bambang Gonggo Murcitro
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INDONESIA
Jurnal Ilmu-Ilmu Pertanian Indonesia
Published by Universitas Bengkulu
ISSN : 14110067     EISSN : 26849593     DOI : https://doi.org/10.31186/jipi
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Ilmu-Ilmu Pertanian Indonesia (JIPI) is a scientific journal that publishes research results related to resource issues and agricultural productivity widely, including Agroecotechnology, Plant Breeding, Soil Science, Plant Protection, and Agricultural Ecology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 226 Documents
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EFFECTS OF Melastoma malabathricum COMPOST APPLICATION ON VEGETATIVE GROWTH OF Pennisetum purpureum cv. Thailand AND ITS SUITABILITY AS RUMINANT FEED Naisya Zahratul Jannah; Neli Definiati; Wismalinda Rita; Lezita Malianti
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 1 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.1.35-41

Abstract

Feed availability is an important factor in increasing livestock productivity, especially in areas with limited land and low soil fertility. Pakchong grass (Pennisetum purpureum cv. Thailand) is a high-quality forage with good growth potential, but its optimal production requires proper soil nutrient management. This study aims to evaluate the effect of compost application derived from Melastoma malabathricum L. agricultural waste on the growth of Pakchong grass. The study was conducted from July 2024 to April 2025 at the UPTD-PPT Livestock and Animal Health Service in Bengkulu Province, using a randomized block design with four compost dose levels, namely 0 (control), 10, 20, and 30 tons/ha, each with three replicates. The variables observed included plant height, leaf width, stem diameter, and number of tillers measured at the first and second harvests. The data were analyzed using analysis of variance (ANOVA) followed by Duncan's Multiple Range Test. The results showed that the application of Melastoma malabathricum L. compost at all doses had no significant effect (P>0.05) on all growth variables of Pakchong grass at both harvest times. However, all variables increased numerically from the first to the second harvest, especially at higher compost doses. This indicates that Melastoma malabathricum L. compost plays a role in improving soil conditions and supporting the vegetative growth of Pakchong grass, although its effect is gradual and not yet significant in a relatively short observation period. Therefore, this compost has the potential to be used as an alternative for long-term sustainable fertilization in environmentally friendly forage production systems.
KEMAMPUAN DEGRADASI RESIDU FUNGISIDA MANKOZEB OLEH Trichoderma harzianum DAN Trichoderma viride Risya Rosyida; Suryana; Indah Sri Lestari; Riska Sukmawati
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 1 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.1.58-65

Abstract

[THE POTENTIAL OF Trichoderma harzianum AND Trichoderma viride AS BIODEGRADATION AGENTS FOR FUNGICIDE RESIDUES CONTAINING THE ACTIVE INGREDIENT MANCOZEB]. Repeated use of fungicides containing the active ingredient mancozeb has the potential to leave residues in agricultural environments and suppress the activity of non-target soil microorganisms. This study aimed to assess the potential and determine the differences between the fungi Trichoderma viride and Trichoderma harzianum in degrading fungicides containing the active ingredient mancozeb in vitro. The study was conducted at the Plant Pathology Laboratory and the Pesticide Toxicology Laboratory, Department of Plant Pests and Diseases, Faculty of Agriculture, Brawijaya University, from May 13 to October 30, 2025. The study employed an experimental design using a completely randomized design. Isolates of T. harzianum and T. viride were purified on PDA medium,identified macroscopically and microscopically, and then propagated on PDB medium. The test was conducted by growing the isolates on PDB medium containing mancozeb at concentrations of 0; 0.5; 1; 1.5; and 2 g/L for 10 days. The parameters observed included Trichoderma biomass and the colony diameter of Colletotrichum gloeosporioides in the bioassay as indicators of residue toxicity. The data were analyzed using ANOVA, followed by a 5% DMRT. The results showed that increasing mancozeb concentration reduced the biomass of both fungi but did not completely inhibit their growth. T. viride produced 0.40 g of biomass in the control and 0.21 g at 2 g/L, while T. harzianum produced 0.48 g in the control and 0.23 g at 2 g/L. The bioassay test showed an increase in the diameter of C. gloeosporioides on media treated with Trichoderma compared to those without Trichoderma. The highest difference in diameter occurred at a concentration of 2 g/L, namely 42.5% for T. viride and 43.5% for T. harzianum. Thus, both Trichoderma species are tolerant to mancozeb and have the potential to reduce its residual toxicity, with a tendency for higher efficacy in T. harzianum under limited in vitro testing conditions.
RESPONS PERTUMBUHAN DAN HASIL BAWANG MERAH (Allium ascalonicum L.) TERHADAP PEMBERIAN PUPUK KALIUM DAN PUPUK MAGNESIUM Muhammad Haikal Avesena; Putra Utama; Julio Eiffelt Rossafelt Rumbiak; Abdul Hasyim Sodiq
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 1 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.1.75-82

Abstract

Shallots are an economically important horticultural crop widely consumed by Indonesian consumers, and the increasing demand for shallots indicates that this commodity has strong potential for sustainable development. The production potential of shallots can be enhanced through the application of potassium and magnesium fertilizers. This study aimed to increase shallot production through the application of potassium and magnesium fertilizers at appropriate dosage levels. This study was a factorial experiment arranged in a Randomized Block Design (RBD). The first factor was the dosage of potassium fertilizer, consisting of four levels: 0, 75, 150, and 225 kg/ha. The second factor was the dosage of magnesium fertilizer, consisting of four levels: 0, 125, 250, and 375 kg/ha. Each treatment combination was replicated three times, resulting in a total of 48 experimental units. The results of the study showed that potassium fertilizer treatment of 150 kg/ha had a significant effect on plant height (44.1 cm), plant weight (73.7 g), bulb diameter (2.52 cm), fresh bulb weight (38.3 g), and dry bulb weight (27.5 g). Meanwhile, magnesium fertilizer treatment of 250 kg/ha had a significant effect on plant height (46.2 cm), plant weight (83 g), bulb diameter (2.61 cm), bulb length (3.76 cm), fresh bulb weight (44.3 g), and dry bulb weight (31.6 g). The interaction between potassium fertilizer at 75 kg/ha and magnesium fertilizer at 375 kg/ha showed a significant effect on the number of leaves (23.7 leaves), number of tillers per clump (5.7 tillers), and number of bulbs (7 bulbs). These findings suggest that the combined application of potassium at 150 kg/ha and magnesium at 250 kg/ha is recommended as an effective fertilization strategy to enhance shallot growth and yield.
AKTIVITAS ANTAGONISTIK KONSORSIUM Bacillus sp. Bth22 DAN Paenibacillus sp. TERHADAP Ralstonia solanacearum PADA TANAMAN CABAI (Capsicum annuum L.) SECARA IN VITRO DAN DI RUMAH KACA Hanun Manzilatika; Arika Purnawati; Endang Tri Wahyu Prasetyawati
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 2 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.2.91-97

Abstract

[ANTAGONISTIC ACTIVITY OF A Bacillus sp. Bth22 AND Paenibacillus sp. CONSORTIUM AGAINST Ralstonia solanacearum IN CHILI (Capsicum annuum L.) UNDER IN VITRO AND GREENHOUSE CONDITIONS]. Bacterial wilt caused by Ralstonia solanacearum is a major constraint in chili cultivation. This study evaluated the antagonistic activity of Bacillus sp. Bth22, Paenibacillus sp., and their consortium against R. solanacearum under in vitro conditions, and their ability to delay symptom onset and suppress bacterial wilt intensity in chili under greenhouse conditions. The antagonism assay followed a completely randomised design with four treatments — pathogen without biocontrol agent, Bacillus sp. Bth22 + pathogen, Paenibacillus sp. + pathogen, and consortium + pathogen — with three replicates each; the greenhouse experiment used six replicates of five plants per replicate, with the replicate mean as the unit of analysis. Treatments significantly affected inhibition zone width (p < 0.001), with consortium + pathogen producing the widest zone (18.833 mm), followed by Paenibacillus sp. + pathogen (16.567 mm) and Bacillus sp. Bth22 + pathogen (13.967 mm), while pathogen without biocontrol agent produced none. The compatibility assay showed no inhibition zone at the intersection of the two isolates, indicating compatibility. In the greenhouse, first symptoms appeared at 2.97, 8.80, and 15.03 days in pathogen without biocontrol agent, Bacillus sp. Bth22 + pathogen, and Paenibacillus sp. + pathogen, whereas no symptoms appeared in consortium + pathogen until the end of the 28-day observation (censored value, >28 days). Disease intensity in consortium + pathogen remained 0% up to 28 days after inoculation, whereas P0 reached 95.57%. The consortium therefore showed higher antagonistic activity and disease suppression than the single isolates and is a candidate for biocontrol formulation; field efficacy and the nature of the interaction between the two isolates require further study.
Invigorasi Benih Sorgum (Sorghum bicolor (L.) Moench) yang Terdeteriorasi Melalui Priming Organik Shafina Oktavera Erwinsyah Putri; Nova Triani; Felicitas Deru Dewanti
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 2 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.2.83-90

Abstract

[ORGANIC PRIMING FOR THE INVIGORATION OF DETERIORATED SORGHUM SEEDS (Sorghum bicolor (L.) Moench)]. Seed deterioration in new superior varieties (VUB) is one of the constraints in crop development, including sorghum Bioguma 3 Agritan. This study aimed to evaluate the effects of organic priming and soaking duration on the viability of deteriorated sorghum seeds. The experiment was conducted at the Seed Technology Laboratory of UPN “Veteran” Jawa Timur using a factorial completely randomized design with two factors, namely type of organic priming (sprout extract, spirulina extract, and combined extract) and soaking duration (6, 12, 18, and 24 h). The observed variables included germination percentage, maximum growth potential, fresh weight of normal seedlings, and dry weight of normal seedlings. The results showed that, in severely deteriorated sorghum seeds, priming with 10% mung bean sprout extract for 6 h produced the highest germination percentage, increasing germination by 97.17% compared with the untreated control, and gave the best result for maximum growth potential. This treatment was comparable to 10% spirulina extract for 12 h and combined extract (sprout extract +spirulina) for 12 h. The highest fresh weight of normal seedlings was obtained from 10% spirulina extract for 12 h, whereas dry weight of normal seedlings was relatively similar among treatments. Soaking for 24 h in all types of organic priming was not recommended because it tended to reduce the viability of deteriorated sorghum seeds.
Evaluasi EVALUASI KESESUAIAN LAHAN UNTUK PENGEMBANGAN TANAMAN PADI DI KAMPUNG KARTINI DISTRIK JAGEBOB Wa Ode Asryanti Wida; Wahida Wahida; Rangga Kusuma; Yosehi Mekiuw
Jurnal Ilmu-Ilmu Pertanian Indonesia Vol 28 No 2 (2026)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jipi.28.2.98-106

Abstract

[LAND SUITABILITY EVALUATION FOR PADDY RICE DEVELOPMENT IN KARTINI VILLAGE, JAGEBOB DISTRICT, MERAUKE REGENCY, SOUTH PAPUA, INDONESIA]. Jagebob District is one of the land optimization program sites in Merauke Regency, yet village-level information on land suitability for paddy rice remains limited. The objectives of this research were to establish the actual land suitability class for paddy rice in Kartini Village, Jagebob District, Merauke Regency, South Papua, to determine the factors limiting that class, and to propose land management directions. A survey covering 383.10 ha was carried out between January and April 2026. Six land units were delineated by overlaying slope, soil type, land use, and landform maps. In each land unit, soil was sampled purposively at five points and composited into a single sample. Sixteen land characteristics were assessed by matching them against paddy rice growth requirements: temperature, water availability, drainage, texture, soil depth, pH (H₂O), cation exchange capacity (CEC), organic carbon, total nitrogen, P₂O₅, K₂O, slope, erosion hazard, flood hazard, surface stones, and rock outcrops. Annual rainfall in the area reaches 2,237.54 mm, the mean temperature is 26.85 °C, and the Oldeman agro-climatic type is C2. Climatic and physical conditions support paddy rice cultivation: clay texture, somewhat poorly to poorly drained soils, 120 cm soil depth, 0–3% slopes, and very low erosion hazard. In contrast, soil chemical properties are limiting: very acidic to acidic pH (4.13–5.14), low CEC (9.03–14.88 cmol/kg), very low organic carbon (0.78–0.88%), low to moderate total nitrogen, and very low P₂O₅. All land units were classified as marginally suitable with the subclass S3nr,na. The limiting factors were nutrient retention, namely organic carbon in all land units and pH in land units 1, 2, 4, 5, and 6, and nutrient availability, namely P₂O₅ in all land units. Paddy rice development in this area requires organic matter addition, soil acidity management, and balanced N and P fertilization. 

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