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All Journal Jurnal Ilmu Tanah dan Lingkungan BIOTROPIA - The Southeast Asian Journal of Tropical Biology Journal of Tropical Soils Jurnal Penelitian Hasil Hutan JURNAL PEMULIAAN TANAMAN HUTAN Journal of Degraded and Mining Lands Management Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Penelitian Hasil Hutan Jurnal Tanah dan Iklim BIOVALENTIA: Biological Research Journal Biodiversitas Journal of Biological Diversity
Iskandar, Iskandar
Department Of Soil Science And Land Resource, Faculty Of Agriculture, IPB University, Jl. Meranti, Dramaga, 16680 Bogor, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Veterinary

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Pengaruh Abu Dasar (Bottom Ash) dan Kompos Kotoran Sapi terhadap Serapan Hara, Pertumbuhan dan Hasil Tanaman Padi pada Lahan Sawah Bukaan Baru Nurmegawati Nurmegawati; Iskandar Iskandar; Sudarsono Sudarsono
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 44, No 1 (2020)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v44n1.2020.51-60

Abstract

Abstrak. Abu dasar merupakan salah satu bahan potensial yang dapat dimanfaatkan sebagai amelioran untuk memperbaiki kualitas tanah masam. Selain memiliki pH tinggi, jumlah abu dasar melimpah dan belum dimanfaatkan. Tujuan penelitian ini adalah untuk mengkaji pengaruh amelioran abu dasar dan kompos kotoran sapi terhadap serapan hara, pertumbuhan dan hasil tanaman padi pada lahan sawah bukaan baru yang sering mengalami masalah keracunan Fe dan Mn. Penelitian ini dilaksanakan di rumah kaca pada Bulan Agustus 2017 sampai Februari 2018 bertempat di rumah kaca, Balai Penelitian Tanah Laladon Bogor dengan menggunakan Rancangan Acak Lengkap (RAL) pola faktorial dengan 3 ulangan. Faktor pertama adalah empat taraf dosis abu dasar dengan, yaitu 0,1; 2,5 dan 5 t ha-1. Faktor kedua adalah dosis kompos kotoran sapi, yaitu 0,5 dan 10 t ha-1. Contoh tanah yang digunakan untuk percobaan adalah tanah Oxisols lahan kering yang dikondisikan sebagai sawah bukaan baru. Tanaman indikator adalah padi varietas Inpari 33. Parameter yang diamati adalah sifat kimia tanah, kadar unsur hara dalam tanaman dan hasil tanaman. Hasil penelitian menunjukkan pemberian abu dasar hingga 5 t ha-1 dan kompos kotoran sapi hingga 10 t ha-1 tidak berpengaruh nyata terhadap kandungan hara dan serapan hara N, P, K, Fe dan Mn tanaman. Pemberian abu dasar tidak berpengaruh terhadap hasil tanaman padi sedangkan pemberian kompos kotoran sapi 10 t ha-1 mampu meningkatkan berat gabah bernas dan berat kering jerami secara nyata dibanding pemberian kompos kotoran sapi 5 t ha-1. Abstract. Bottom ash is one of the potential materials that can be used as ameliorants to improve the quality of acidic mineral soils. Besides having high pH-value, bottom ash is also abundant in amount and is still untapped. The purpose of this study was to examine the effects of bottom ash and cow manure compost ameliorant on the nutrient uptake, growth and yield of rice plants in a newly open rice field which often shows problems with a high solubility of Fe and Mn. This study was conducted in August 2017 to February 2018 at a greenhouse of Soil Research Institute and was carried out using a completely randomized design (CRD) factorial pattern. The first factor was the dose of bottom ash (0.1, 2.5 and 5 t ha-1) and the second factor was the dose of cow manure compost (0.5 and 10 t ha-1). Each experiment was repeated three times that resulted in 36 experimental pots in total. The soil sample used in this experiment was an Oxisols which was  conditioned as a newly established rice field. The rice variety used was Inpari 33. The parameters observed were soil chemical properties, nutrient content in plants and crop yields. The results showed that bottom ash up to 5 t ha-1 and cow manure compost up to 10 t ha-1 had no significant effect on nutrient content and nutrient uptake of N, P, K, Fe and Mn of plants. Provision of bottom ash does not affect the production of rice plants while the provision of 10 t ha-1 cow manure compost can significantly increase the weight of rice grain and straw dry weight significantly compared to 5 t ha-1 cow manure compost.
Utilizing fine coal waste as a topsoil substitute on mine reclamation Wahyu Sriningsih; Iskandar Iskandar; Dyah Tjahyandari Suryaningtyas
Journal of Degraded and Mining Lands Management Vol 9, No 4 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.094.3595

Abstract

 Topsoil in post-mined land generally has a low fertility level. Its availability is not always in sufficient quantities to meet minimal needs for mine reclamation, so substitute materials and ameliorants are needed to increase its quantity and quality. Fine coal and fly ash-bottom ash (FABA) are wastes expected to reduce the demand for topsoil and, at the same time, may improve topsoil quality. This study aimed to examine the application of fine coal as a topsoil substitution and its effect on changes in the chemical properties of topsoil and the growth of jabonv (Anthocephalus chinensis). The study was conducted in a greenhouse with a completely randomized design model with two factors. The first factor was fine coal with four levels of 0, 10, 20, and 50% from the topsoil (w/w), and the second factor was FABA with three levels of 0, 500, 1000 g/15 kg of growing media. The jabon plant was grown for 24 weeks. The results showed that up to 50% fine coal could be used as a topsoil substitution. The interaction of fine coal and FABA increase pH, organic C, total N, cation exchange capacity, available P, base saturation, exchangeable cations, and micronutrients, and reduce the amount of exchangeable Al in the soil. FABA with a dose of 1000 g/15 kg of growing media and 50% fine coal was the best treatment to increase the growth of the jabon plant.
ENDOPHYTIC TESTING OF Serratia marcescens strain NPKC3_2_21 AGAINST INPARA 3 RICE VARIETY Gunawan Sutio; Iskandar Iskandar; Lilik Tri Indriyati; Gunawan Djajakirana
BIOVALENTIA: Biological Research Journal Vol. 9 No. 1 (2023)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24233/biov.9.1.2023.372

Abstract

Pest management is a crucial concern, especially when dealing with insect pests that can cause extensive damage to agricultural crops and the economy. One such pest is the rice stem borer (Scirpophaga innotata), which infests rice stems and poses a significant threat. To combat these pests, various microbial agents have been developed for effective pest control. Among these, the endophytic microbe in biological plant protection plays a key role in the program of sustainable pest management. An endophytic bacterium, Serratia marcescens strain NPKC3_2_21, has been identified as a key player in sustainable pest management, particularly in rice crops. In this study, we aimed to investigate the endophytic characteristics of S. marcescens strain NPKC3_2_21 in the swamp rice plant of the Inpara 3 variety of swamp rice plants. To establish its roles. Marcescens as an endophytic bacterium in rice plants, specifically the Inpara 3 variety, we conducted tests by inoculating bacteria on the plant tissue of rice plants that have been sterilized rice plant tissues with the bacteria. We assessed the presence of S. marcescens strain NPKC3_2_21 in plant tissues by applying isolates to the surface of rock wool, which supported the growth of wet rice plants aged ten or over ten days or older after planting. Samples were collected from the underside of the stem, the bottom of the leaves, and the roots on days 2, 7, and 14 after the application of isolates to the rock wool. The samples were then washed in 70% alcohol and 4% chlorox for 30 seconds and subsequently isolated on Luria Bertani (LB) agar media. Furthermore, we conducted tests to determine the ligninolytic, cellulolytic, and proteolytic activities of S. marcescens, which helped elucidate its endophytic ability. Based on the result, the endophytic capabilities. Based on the results, we found that S. marcescens strain NPKC3_2_21 exhibited endophytic characteristics solely in the stem tissue of the Inpara 3 rice variety. However, we did not observe its presence in the root and leaf tissues.
RESPONSE OF LONKIDA (Nauclea orientalis L.) TOWARDS MYCORRHIZAL INOCULUM IN WATERLOGGED CONDITION Faisal Danu Tuheteru; Cecep Kusmana; Irdika Mansur; Iskandar Iskandar
BIOTROPIA Vol. 22 No. 1 (2015): BIOTROPIA Vol. 22 No. 1 June 2015
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2136.803 KB) | DOI: 10.11598/btb.2015.22.1.416

Abstract

Waterlogged condition is one of the environmental stresses unfavorable for plants and mycorrhizal fungi. Arbuscular Mycorrhizal (AM) species that are tolerant tend to be more adaptive to waterlogged conditions. Besides increasing plant tolerance, the documented effects of AM fungi (AMF) inoculation on wetland plant performance remain inconsistent, and AMF application may also cause plant growth depression under waterlogging. This study aimed to examine the morpho-anatomical adaptation, survival, growth, biomass, and nutrient uptake of Nauclea orientalis (L.) seedlings from different habitats inoculated with Arbuscular Mycorrhizal Fungi under waterlogged conditions for 90 days. Experimental procedures included seed germination, preparation of AMF inoculum, inoculation, and waterlogging treatment. The results showed that N. orientalis seedlings formed lenticels (100%), adventitious roots (41%), and aerenchyma under waterlogged conditions. Seedlings originating from dryland habitats, both mycorrhizal and non-mycorrhizal, had lower height growth rate compared to those from other habitat types. Similar patterns were observed in relative growth rate for shoot (RGRs), root (RGRr), total (RGRt), and root-to-shoot ratio. Treatments of swamp habitat seedlings without waterlogging and with waterlogging, as well as savannah seedlings under waterlogged conditions, showed higher total plant dry weight and RGRt than other treatments. In general, total nitrogen concentration in roots and shoots was highest in the interaction between swamp habitat seedlings and non-mycorrhizal treatment under waterlogging. However, seedlings from dryland habitats required AMF under waterlogging to improve biomass and nitrogen accumulation in roots. Independently, waterlogging increased average height gain (18%), stem diameter (46%), leaf area (40%), leaf length (17%), and leaf width (21%). Nonetheless, waterlogged treatment decreased the number of leaves (9%) and AMF colonization (71%). The results indicate that seedlings from temporary swamp habitats demonstrated better growth performance and higher biomass under waterlogged conditions, regardless of AMF inoculation.
Effectiveness of potassium humate and endophytic bacteria from Serratia marcescens strain NPKC3_2_21 in increasing root weight of paddy cultivation in acidic soil GUNAWAN SUTIO; ISKANDAR ISKANDAR; LILIK T. INDRIYATI; GUNAWAN DJAJAKIRANA
Biodiversitas Journal of Biological Diversity Vol. 24 No. 11 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d241156

Abstract

Abstract. Sutio G, Iskandar, Indriyati LT, Djajakirana G. 2023. Effectiveness of potassium humate and endophytic bacteria from Serratia marcescens strain NPKC3_2_21 in increasing root weight of paddy cultivation in acidic soil. Biodiversitas 24: 6316-6322. Phosphorus (P) deficiency is a significant factor limiting rice agricultural production in acidic soil. The availability of P in acidic soil is generally insufficient because a substantial portion of P is absorbed by Al³? and Fe²?, rendering it inaccessible to plants. This P deficiency in acidic soil hampers proper root growth. However, this limitation can be overcome by the application of potassium humate and endophytic bacteria. The objective of this study was to investigate the effects of phosphate fertilizer with and without potassium humate and/or endophytic bacteria on root growth in acidic fields. The research involved two treatment factors. The first factor comprised four levels of ex-madura phosphate rock fertilizer: 100% (1), 75% (2), 50% (3), 25% (4), and no application of phosphate rock fertilizer (5) and the second factor included potassium humate (A), endophytic bacteria from Serratia marcescens strain NPKC3_2_21 (B), a combination of potassium humate and S. marcescens endophytic bacteria (C), and the absence of both potassium humate and S. marcescens endophytic bacteria (D). The results revealed a positive interaction between phosphate fertilizer, the combination of potassium humate, and S. marcescens endophytic bacteria. Therefore, utilizing endophytic bacteria from S. marcescens and potassium humate could be an effective strategy for increasing root biomass in rice plants grown in acidic soil with a deficiency in available P.
Dynamics of vegetation diversity and arbuscular mycorrhizal fungi in post-coal mining revegetation land in Sawahlunto, West Sumatra, Indonesia WELLY HERMAN; ISKANDAR ISKANDAR; SRI WILARSO BUDI; HERU BAGUS PULUNGGONO; NORIL MILANTARA
Biodiversitas Journal of Biological Diversity Vol. 25 No. 12 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d251201

Abstract

Abstract. Herman W, Iskandar, Budi SW, Pulunggono HB, Kurniati, Milantara N. 2024. Dynamics of vegetation diversity and arbuscular mycorrhizal fungi in post-coal mining revegetation land in Sawahlunto, West Sumatra, Indonesia. Biodiversitas 25: 4627-4641. Post-coal mining causes significant changes in vegetation, soil, and landscape, necessitating reclamation to increase land area through revegetation activities as per government policy. Revegetation is expected to accelerate the recovery of ecosystem functions and reduce the impact of coal mining activities. Therefore, this study aims to analyze the dynamics of vegetation diversity and Arbuscular Mycorrhizal Fungi (AMF) on post-coal mining revegetation land in Sawahlunto, West Sumatra, Indonesia. Vegetation samples were obtained using the purposive sampling method, and AMF analysis was carried out using the wet-sieving decanting method. The results showed an increase in vegetation diversity along with the increasing age of the revegetation plants. The highest control of plant species was Acacia mangium with INP values ??ranging from 100-300%. Vegetation diversity and vegetation dominance index were positively correlated with spore density with correlation coefficient values ??of 0.083 and 0.029. However, the relationship between diversity and vegetation dominance index in influencing spore density had a small effect; the highest spore density was found in revegetation in 2006, with a total of 555 spores per 25 g of soil-1. It can be concluded that natural succession land materials and revegetation in post-coal mining land up to 32 years of age can improve vegetation growth but still cannot match natural forests, both in terms of the number of species growing and the level of vegetation diversity achieved. However, it is important to note that this study has limitations, such as the focus on a specific region and the need for further research to understand the long-term effects of revegetation.
Laju Dekomposisi dan Hara Tersedia dari Pangkasan Tumbuhan Bawah Perkebunan Kelapa Putri Oktariani; Putu Kevin Suryawijaya; Gunawan Djajakirana; Iskandar
Jurnal Ilmu Tanah dan Lingkungan Vol 27 No 2 (2025): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.27.2.82-87

Abstract

The implementation of organic farming in peatland coconut plantations faces challenges such as the low availability of natural nutrients, restrictions on the use of synthetic fertilizers and pesticides, and the demand for soil fertility conservation to ensure sustainable production. One potential solution is the utilization of undergrowth pruning, predominantly composed of Nephrolepis sp., as a source of organic nutrients.This study aimed to determine the decomposition rate and estimate the nutrient release potential from undergrowth pruning in a coconut plantation on peat soil in Riau Province, Indonesia. The litter bag method was employed with an observation period of eight weeks. Results showed that the decomposition rate of the pruned biomass reached 1.92 g per week, with a dry weight reduction of 68%. The most abundant nutrients released during decomposition were potassium (1.79%), phosphorus (0.07%), and copper (5.68 ppm). These findings suggest that undergrowth pruning has the potential to serve as an alternative nutrient source, supporting environmentally friendly coconut cultivation systems on peatlands.
Co-Authors . Sudarsono B Mulyanto B. Mulyanto Cecep Kusmana Darmawan Darusman Darusman Dyah Tjahyandari Suryaningtyas E Yatno EDI YATNO Evrizal AM Zuhud Faisal Danu Tuheteru GUNAWAN DJAJAKIRANA GUNAWAN SUTIO Gunawan Djajakirana Gunawan Sutio Gusti Wahdaniyah Heru Bagus Pulunggono Ikbal Ikbal Indah Irwanti Indriyati, Lilik Tri Irdika Mansur Irdika Masyur Jaswadi Jaswadi Kissinger Kissinger Latifah Latifah LILIK T. INDRIYATI Milantara, Noril Nirmala Juita Nurmegawati Nurmegawati Nurmegawati Nurmegawati Putri Oktariani Putu Kevin Suryawijaya Rika Yayu Agustini S Sudarsono Septi Nurul Aini Sri Wilarso Budi Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Sudarsono Wahyu Sriningsih WELLY HERMAN