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Isolation And Characterization Of Phosphate Solving Bacteria From Swamp Soil With High Levels Of Acidity Galang Indra Jaya; Hidayah Utami, Sri Nuryani; Widada, Jaka; Annisa Yusuf, Wahida; Abbas, Saipul; Fatturahman Ridwan, Nur; Noviyanto, Amir
Jurnal Pertanian Vol. 14 No. 2 (2023): OKTOBER
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/jp.v14i2.9932

Phosphate solubilizing bacteria (PSB) are one of the microbes that play an important role in soil and plant cycles. Phosphate (P) is a very important macronutrient for plants. In soil, most of the P element is found to be unavailable to plants because it is fixed by Ca, Al or Fe. This research aims to identify BPF in acid soil which has the potential to dissolve phosphate elements. The method used in this research is the isolation of BPF from acid soil using the National Botanical Research Institute's Phosphate (NBRIP) medium, phosphate dissolution index test and UV Visual. Soils from overflow type C (TLC) swamps have higher diversity compared to TLB soils. The abundance of BPF in TLC soil was higher (5,4 107 CFU per gram) compared to soil from overflow zone B (TLB) (2,9 107 CFU per gram) because TLC soil had a lower acidity level than TLB. There were 55 BPF isolates obtained from these two types of soil. Two isolates (TLB1 and TLB2) had a better phosphate solubilization index and all potential isolates that were extracted and subjected to gDNA amplification showed a DNA band at 1330-1500 bp.

Characterization and Classification of Soils in Landslide Residual Zones to Estimate the Presence of Shallow Slip Plane Noviyanto, Amir
JOURNAL OF TROPICAL SOILS Vol 30, No 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.53-60

While landslide determination has traditionally relied on topography and geology, the connection between soil characteristics and landslide potential remains a relatively unexplored area. This study sets out to bridge this gap by investigating the relationship between soil properties and their classification and the likelihood of a shallow slip field triggering landslides. The research commenced with a survey of three landslide sites featuring diverse soil materials. Characterization and sampling were carried out on the residual zone left at the top of the landslide. The findings revealed that certain landslides could be identified as having potential slip planes only at a depth of 120 cm, while others could not. Two landslides in Magelang exhibited the presence of typical endopedon horizons, namely Bt (argillic). These argillic horizons serve as accumulation sites for fine and plastic clay materials. The low organic matter content also contributes to the instability and rapid dispersion of the structure. Meanwhile, the research also identified practical implications for landslide management. For instance, one of the landslides in Purworejo showed that the soil profile in the residual zone had low clay content and did not form a Bt horizon. However, the presence of shallow argillic with high clay content indicated a potential landslide risk. This finding suggests that landslides can be predicted based on soil characteristics, particularly the presence of argillic horizons. Moreover, the study identified specific soil types, such as Alfisols and Ultisols, as being prone to landslides. The Bt horizon, which can be protected by reducing erosion and runoff using silt pits, cover crops, and flow-breaking media, offers a practical solution for landslide prevention.

DIVERSITY OF VISITOR INSECTS IN CAYALY CABE (Capsicum frutescens) GARDEN ON KARST LAND, GUNUNG KIDUL, YOGYAKARTA Handru, Alan; Sidiq, Muhammad Fajar; Avianto, Yovi; Noviyanto, Amir; Jaya, Galang Indra; Putri, Diyona
Agrisaintifika: Jurnal Ilmu-Ilmu Pertanian Vol. 9 No. 1 (2025): Agrisaintifika
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/ags.v9i1.5557

This study aims to identify and analyse the diversity of insect visitors to the cayenne pepper (Capsicum frutescens) garden in the karst area of Gunung Kidul, Yogyakarta. The method used was purposive sampling method by direct capture. The data collected were analysed by Shannon-Wiener diversity index. The conclusion of this study is that there is a diversity of visitor insects categorised as medium (H'=1.7) in the cayenne pepper garden in the karst area of Gunung Kidul, Yogyakarta. This insect diversity can help in the process of pollination and natural pest control in cayenne pepper plants in the karst area. Understanding the diversity of these insects is important for environmental conservation and sustainable agricultural management, especially in karst areas.

PENINGKATAN KESUBURAN TANAH MEDITERAN DARI FORMASI BATUGAMPING GUNUNGKIDUL MELALUI APLIKASI PUPUK KANDANG SAPI Nusantara, Alfonsus Eka Bara; Kautsar, Valensi; Noviyanto, Amir
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 2 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.2.1

Gunungkidul Regency is one of the areas facing agricultural challenges, including the threat of drought and extremely low soil fertility. Low soil fertility is characterized by thin soil solum, sandy texture, and low organic matter content. Several efforts to improve soil fertility have been carried out using organic materials, particularly cow manure, which is abundantly available in the local community of Gunungkidul. This study aimed to evaluate the impact of organic fertilizer application on soil fertility. Soil samples were taken from Mediterranean soil that had developed on limestone formations in Gunungkidul. The research method used was an experimental approach, analyzing the changes in the soil's physical and chemical properties following the application of organic fertilizer. The experimental design included various ratios of Mediterranean soil material (K) to cow manure fertilizer (S) as follows: (i) Control (100% Mediterranean soil material and 0% cow manure); (ii) K1S3 (25%:75%); (iii) K2S2 (50%:50%); (iv) K3S1 (75%:25%). The results showed that the K1S3 treatment demonstrated the best performance during the incubation period and significantly improved soil fertility. The K1S3 treatment resulted in enhanced soil aggregate stability, an increase in pH to 7.73 (alkaline), an increase in soil organic carbon (C-organic) to 3.55% (high), an increase in total nitrogen (N-total) to 0.49% (medium), and an increase in total phosphorus (P-total) to 0.33% (medium). The study indicates that a higher application of organic material leads to greater improvements in soil chemical properties. Therefore, the use of cow manure as organic fertilizer can be an effective solution for improving the quality of calcareous soils in Gunungkidul.

Pemanenan Air Hujan Ex-Situ oleh Masyarakat Petani untuk Efektivitas Air Irigasi di Pertanian Lahan Kering, Kabupaten Gunungkidul, Yogyakarta: Ex-Situ Rainwater Harvesting by Community Farmers for Irrigation Water Effectiveness in Dryland Agriculture, Gunungkidul District, Yogyakarta Bimantio, Mohammad Prasanto; Noviyanto, Amir; Jaya, Galang Indra; Raharjo, Dedy Tri; Keviana, Agesty; Suparyanto, Teddy
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 2 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i2.8718

The karst landscape in Gunungkidul Regency faces major challenges in the agricultural sector, mainly due to limited water availability and dependence on rainfed farming systems. To overcome these challenges, a community service program was implemented by introducing rainwater harvesting and drip irrigation technology to the Giri Muda Farmer Group. This activity aims to increase water availability and water use efficiency in drylands through the application of environmentally friendly technology. The community service method includes an initial survey, system design planning, installation of rainwater harvesting and drip irrigation installations, and technical training for farmers on system operation and maintenance. The evaluation of the activities showed a significant increase in understanding and skills, which had a positive impact on horticultural agricultural productivity. The technology was well received by farmers and has great potential to be developed in the Gunungkidul region and other similar areas. This service program not only succeeded in increasing agricultural productivity in drylands but also contributed to mitigating the impacts of climate change.

Desain Pertanian Berkelanjutan di Lanskap Karst Gunungkidul: Integrasi Pemanenan Air, Akuakultur, dan Irigasi Tetes Bimantio, Mohammad Prasanto; Noviyanto, Amir; Jaya, Galang Indra; Raharjo, Dedy Tri; Keviana, Agesty
Agroteknika Vol 8 No 2 (2025): Juni 2025
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/agroteknika.v8i2.455

Lanskap karst seperti di Gunungkidul, Yogyakarta, menghadapi tantangan serius dalam sektor pertanian akibat kelangkaan air dan kondisi tanah yang dangkal serta mudah tererosi. Keterbatasan ini menghambat produktivitas pertanian dan ketahanan terhadap variabilitas iklim. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sistem pertanian berkelanjutan yang secara khusus disesuaikan dengan karakteristik wilayah karst. Sistem yang dikembangkan mengintegrasikan pemanenan air hujan, ekstraksi air tanah yang terkendali, akuakultur, dan irigasi tetes. Penerapan dilakukan di Desa Sumbergiri, Gunungkidul. Air hujan dikumpulkan dari atap bangunan dan disimpan untuk digunakan saat musim kemarau, sehingga mengurangi ketergantungan pada air tanah. Air tanah diambil melalui sumur dalam dengan pompa bertenaga surya sebagai sumber cadangan. Limbah akuakultur yang kaya nutrisi dimanfaatkan untuk mengairi tanaman melalui sistem irigasi tetes yang menyalurkan air langsung ke zona akar tanaman secara efisien. Hasil penelitian menunjukkan bahwa pendekatan terintegrasi ini meningkatkan efisiensi penggunaan air, mendukung daur ulang nutrisi, dan meningkatkan hasil panen, bahkan selama musim kemarau. Sistem ini menawarkan model yang dapat direplikasi untuk pertanian berkelanjutan di wilayah karst dan daerah yang kekurangan air.

Characterization and Classification of Soils in Landslide Residual Zones to Estimate the Presence of Shallow Slip Plane Noviyanto, Amir
JOURNAL OF TROPICAL SOILS Vol. 30 No. 1: January 2025
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2025.v30i1.53-60

While landslide determination has traditionally relied on topography and geology, the connection between soil characteristics and landslide potential remains a relatively unexplored area. This study sets out to bridge this gap by investigating the relationship between soil properties and their classification and the likelihood of a shallow slip field triggering landslides. The research commenced with a survey of three landslide sites featuring diverse soil materials. Characterization and sampling were carried out on the residual zone left at the top of the landslide. The findings revealed that certain landslides could be identified as having potential slip planes only at a depth of 120 cm, while others could not. Two landslides in Magelang exhibited the presence of typical endopedon horizons, namely Bt (argillic). These argillic horizons serve as accumulation sites for fine and plastic clay materials. The low organic matter content also contributes to the instability and rapid dispersion of the structure. Meanwhile, the research also identified practical implications for landslide management. For instance, one of the landslides in Purworejo showed that the soil profile in the residual zone had low clay content and did not form a Bt horizon. However, the presence of shallow argillic with high clay content indicated a potential landslide risk. This finding suggests that landslides can be predicted based on soil characteristics, particularly the presence of argillic horizons. Moreover, the study identified specific soil types, such as Alfisols and Ultisols, as being prone to landslides. The Bt horizon, which can be protected by reducing erosion and runoff using silt pits, cover crops, and flow-breaking media, offers a practical solution for landslide prevention.

Pengelolaan Limbah Organik Berbasis Masyarakat: Pengomposan Daun Bambu untuk Pertanian Berkelanjutan dan Pelestarian Lingkungan Jaya, Galang Indra; Sonjaya, Jajang Agus; Avianto, Yovi; Noviyanto, Amir; Handru, Alan
Abdimas Galuh Vol 7, No 2 (2025): September 2025
Publisher : Universitas Galuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25157/ag.v7i2.18656

Pengelolaan limbah organik, khususnya daun bambu, menjadi isu penting dalam pelestarian lingkungan dan pertanian berkelanjutan. Di Indonesia, sekitar 40% sampah terdiri atas limbah organik, namun pemanfaatannya masih rendah, termasuk pada daun bambu yang sering dibakar, meningkatkan emisi karbon. Padahal, daun bambu memiliki rasio C/N yang ideal untuk kompos, mudah terurai, dan dapat memperbaiki kualitas tanah. Salah satu tantangan utama dalam pemanfaatan daun bambu adalah rendahnya pengetahuan masyarakat tentang pengelolaan limbah organik ini. Untuk itu, program pengabdian kepada masyarakat ini dilaksanakan di KTH (Kelompok Tani Hutan) Bambu Lestari Bulaksalak, Desa Wukirsari, Kapanewon Cangkringan, Kabupaten Sleman, dengan pendekatan partisipatif. Program dimulai dengan sosialisasi melalui presentasi dan diskusi mengenai pengelolaan limbah organik, manfaat kompos, serta potensi daun bambu sebagai bahan kompos. Sosialisasi ini bertujuan untuk meningkatkan pemahaman warga dan mendorong adopsi praktik ramah lingkungan. Setelah itu, kegiatan dilanjutkan dengan praktik langsung pengomposan di lahan milik pemerintah desa. Proses pengomposan terdiri atas tujuh tahap: pengumpulan dan pembersihan seresah bambu, pencacahan daun bambu, pencampuran bahan kompos (daun bambu, pupuk kandang, dan tanah), pengaturan kelembapan, pengadukan awal, serta pemeliharaan tumpukan kompos selama proses fermentasi. Setelah sekitar 40 hari, kompos matang siap digunakan sebagai pupuk organik. Program ini berhasil meningkatkan keterampilan teknis warga dalam pengelolaan limbah organik dan memperkuat kesadaran tentang pentingnya pemilihan lokasi pengomposan yang tepat. Untuk keberlanjutan, pendampingan lebih lanjut dan penguatan kelembagaan lokal sangat dibutuhkan, selain kolaborasi lintas sektor untuk mereplikasi model ini di wilayah lain.

Reforestation Impact: Contrasting Carbon Stock and Biodiversity of Clove in Monoculture and Mixed Gardens Over 25 Years Avianto, Yovi; Noviyanto, Amir; Sidiq, Muhamad Fajar; Hernowo, Hernowo; Pratama, Ananta Bayu
Jurnal Biologi Tropis Vol. 24 No. 3 (2024): July - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i3.7253

Tropical forests, vital for absorbing CO2 and maintaining ecosystem balance, are threatened by deforestation and unsustainable agricultural practices. Mixed garden or clove agroforestry systems, which combine clove cultivation with other crops, offer a sustainable alternative to traditional monoculture practices. This study aims to assess the biomass potential, carbon storage, and biodiversity in clove monoculture and mixed garden systems. The research was conducted in February 2024 at smallholder clove plantations and secondary forests in Pesaren, Sukorejo, Kendal, Central Java. The study involved primary data collection on clove monoculture and mixed garden systems using standardized plot sampling techniques. Biomass, carbon storage and carbon sequestration was calculated through field measurements utilizing allometric equations, while biodiversity was assessed using the Shannon-Wiener index based on species richness and evenness within the sampled plots. The mixed garden system closely approximates secondary forests in terms of biomass, carbon storage, CO2 sequestration, biodiversity, and species evenness, with respective values of 100.36 tons/ha, 47.17 tons/ha, 173.11 tons/ha, 2.837, and 0.91. In contrast, the clove monoculture system recorded the lowest values across all parameters: 67.03 tons/ha for biomass, 31.50 tons/ha for carbon storage, and 115.61 tons/ha for CO2 sequestration, with a dominance of one species and a Shannon-Wiener index and evenness value of 0. These results highlight the superior ecological benefits of mixed garden systems over monoculture clove plantations.

Analyzing the Influence of Altitudinal Gradients on Clove Physiology and Yield in the Menoreh Highlands Avianto, Yovi; Pratama, Ananta Bayu; Noviyanto, Amir; Fauzi, Firman Rahmat
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): Oktober - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v24i4.7562

Clove (Syzygium aromaticum) is a significant industrial crop commodity in Indonesia whose yield and essential oil quality are influenced by altitude. Variations in altitude lead to differences in microclimatic conditions, which in turn affect plant physiological activities and productivity. This study aimed to investigate the impact of altitude on the physiological activity, yield, and essential oil content of clove plants. The research was conducted in the lower (345 m asl), middle (612 m asl), and upper (872 m asl) zones of the Menoreh Highlands from March to August 2022. Results indicated that altitude significantly influenced microclimatic conditions, thereby affecting the physiological status and yield of clove plants. The middle zone exhibited optimal physiological performance and flower yield, with a balanced rate of photosynthesis and transpiration. Higher proline levels in the lower and upper zones suggested temperature stress, which reduced photosynthetic rate and yield. Essential oil production and eugenol content were also influenced by altitude, with the middle zone yielding the highest oil volume, although eugenol content was higher in the upper zone. Correlation analysis revealed that temperature and relative humidity were the dominant factors determining clove yield and quality.

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