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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) CHEMISTRY PROGRESS Journal of Tropical Soils Jurnal Agro Teknologi Tropika Indonesian Journal of Agricultural Science Jurnal Sumberdaya Lahan Jurnal Sumberdaya Lahan Jurnal Tanah dan Iklim

Iswandi Anas

Departemen Ilmu Tanah Dan Sumber Daya Lahan, Fakultas Pertanian, Institut Pertanian Bogor (IPB) Jl. Kamper, Kampus IPB Dramaga 16680 Indonesia.

Author-ID : 227036

Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science

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Rooting System of Rice Cultivated under System of Rice Intensification (SRI) Method which Improving Rice Yield Nurul Hidayati; Triadiati Triadiati; Iswandi Anas
HAYATI Journal of Biosciences Vol. 25 No. 2 (2018): April 2018
Publisher : Bogor Agricultural University, Indonesia

The development of plant roots is known to play a very important role in the uptake of water and nutrients by rice plants. However, there are few studies on what changes, if any, are induced in the rooting systems of rice plants under System of Rice Intensification (SRI) management. This research evaluated changes of rice roots with SRI method compared to conventional method of irrigated rice cultivation and assessed influences that could improve rice yield. Under SRI management, plant roots were significantly longer and heavier than with conventional method. SRI method also increased the number of root hairs by 60%, and root hairs were healthier and more vigorous compared with conventional method. However, root respiration was not different in the two methods. There was less formation of aerenchyma (air pockets) in rice roots with SRI method, as both the number and size of root aerenchyma were lower with SRI than with conventional method. The SRI method was able to improve the root length, root dry weight compared to the conventional method. The SRI method was also able to increase the number of root hairs by 60% compared with the conventional method. Eh measurements in the soil with SRI method were higher than with conventional method. However, there was no significant different in root respiration. The aerenchyma formation of rice roots in SRI method was lower than conventional method.

Isolation, Selection and Identification of Polyaromatic Hydrocarbons (PAHs) Degrading Bacteria from Heavy Oil Waste (HOW)-Contaminated Soil Mohamad Yani; Charlena Charlena; Zainal Alim Mas’ud; Iswandi Anas; Yadi Setiadi; Agung Dhamar Syakti
HAYATI Journal of Biosciences Vol. 27 No. 2 (2020): April 2020
Publisher : Bogor Agricultural University, Indonesia

The heavy oil waste (HOW) containing polyaromatic hydrocarbon (PAHs) is a persistent organic pollutants (POPs) that difficult to degrade. The new PAH degrading consortium was investigated from HOW contaminated soil in North Sumatera of Indonesia. The isolation, selection and identification of polyaromatic hydrocarbon degrading bacteria from soil contaminated by HOW was conducted to solve a bioremediation process. The isolation microbes from soil contaminated by HOW was performed using a minimum ONR7a media and followed on marine agar media for purification purposes. From the performed isolation results, 11 isolates were able to degrade PAHs compounds, such as phenanthrene, dibenzothiophene, or fluorene compounds. They grew at pH range of 4.8-8.2 and performed on emulsification activity in paraffin from 0.150-0.662. Three of them showed the best performance on HOW biodegradation capability and then successfully selected and identified as Salipiger sp., Bacillus altitudinis, and Ochrobactrum anthropi. using 16S rDNA. The HOW biodegradation as TPH-degradation were 38.66%, 59.60%, and 47.16%, respectively. Those isolated bacteria could potentially be as bioremediation agents to develop on bioremediation process for soils contaminated by HOW.

Independent Smallholder Oil Palm Expansion and Its Impact On Deforestation: Case Study in Kampar District, Riau Province, Indonesia Erniwati Erniwati; Ervizal AM. Zuhud; Iswandi Anas; Arzyana Sunkar; Yanto Santosa
Jurnal Manajemen Hutan Tropika Vol. 23 No. 3 (2017)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.183 KB)

Independent smallholders who manage their own oil palm plantations without receiving technical assistance and agricultural inputs from oil palm estates or government have been increasing rapidly in Indonesia in recent years. However the magnitude of their impacts on tropical forest deforestation remains largely unevaluated. The objective of this study was to explore the history of land use, and the changes in land cover and status since the onset of oil palm plantation activities. The study was conducted from March to April 2016. Surveys were carried out in 30 ha of independent smallholder oil palm in Kampar District, Riau Province. To identify the land status, the Agreed functional forest classification (TGHK) and Provincial land use planning (RTRWP) maps were overlaid on images of the area of independent smallholder oil palm. Landsat images three years before oil palm was established were used to assess forest cover changes. Furthermore, oil palm smallholders and elders of the local community in the research area were interviewed to identify land use prior to oil palm. Our results showed that, based on land status, 47% of the area of independent smallholders’ oil palm derived from logged forest; that is the land changed in status from forest to oil palm plantation. The other 53% of oil palm area derived from non-forested land. The land use history before the establishment of independent smallholder oil palm mostly comprised general-purpose field activities and former forest-felling (forest concessions). The land cover before conversion into oil palm comprised rubber plantation, secondary forest, and shrub cover. From the results of our survey, we conclude that most of the oil palm plantations planted between 1990 and 2002 have their origins not in primary forest, but rather in degraded secondary forest, former fields, and shrub-land. These results imply that conversion of forest area into oil palm plantations is not the direct cause of deforestation in the tropical forests of Kampar, Riau Province.

TEKNIK PENGENDALIAN ALIRAN PERMUKAAN YANG EFEKTIF PADA USAHATANI LABAN KERING BERLERENG A Noeralam; Sitanala Arsyad; Iswandi Anas
Jurnal Ilmu Tanah dan Lingkungan Vol 5 No 1 (2003): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

The aims of this study were to find out the effects of runoff control techniques and cropping patterns on the runoff rate of sloping upland farming. A series of factorial experiments were conducted on a Lithic Dystrudepts located at three different sloping uplands in Malang, East Java. The area belongs to the C type of Oldeman climatic zone. The three runoff control techniques were soil pit with vertical mulch (T1), soil pit with ridge and vertical mulch (T2), and soil pit with a ridge (T3). The two sequential cropping patterns were maize (Zea mays L.) - soybean (Glycine max (L.) Merr.) - maize (P1), and peanut (Arachis hypogaea) - maize - soybean (P2). The result indicates that runoff control techniques decrease rate of runoff by 88%, for soil pit with ridge technique, 86% for soil pit with ridge and vertical mulch technique, and 84% for soil pit with vertical mulch technique. The relationship ofrainfallJx) with run off(y) can be expressed by y = 0.05x; r = 0.92 in cropped plot andy = 0.30x; r = 0.90 in bare plot. Keywords: ridge, soil pit, vertical mulch

ISOLASI DAN SELEKSI BAKTERI FILOSFER PEMICU TUMBUH DARI DAUN PADI (ORYZA SATIVA L.) VARIETAS IR-64 D.A Santosa; N Handayani; Iswandi Anas
Jurnal Ilmu Tanah dan Lingkungan Vol 5 No 1 (2003): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Phylosphere bacteria are bacteria that live on the leave surface. Phylosphere bacteria have been reported to improve the growth of several plants such as rice. However, in Indonesia, the study concerning phylosphere bacteria is very rare. The aims of this study were to isolate and select phylosphere bacteria which are able to stimulate the growth of rice cultivar IR-64. Phylosphere bacteria were isolated from leaves of rice cultivar lR-64 grown at Ciherang (Sindangbarang) and at Pasirkuda (Ciomas) Bogor at the age of two, four and eight weeks after planting. The media used to isolate the phylosphere bacteria was Agar Ashbey. The surface of rice seeds was sterilized and then inoculated by deeping the rice seeds into bacterial suspension with a cell density of 1 x 106 cells ml-1. Leave inoculation was done by deeping leaves of three weeks old rice seedling into bacterial suspension with a cell density of 1 x 106 cells ml-1. Parameters measured were plant height, upper part biomas and root biomas. Phyllosphere bacteria were identified based on Bergey's Manual of Determinative Bacteriology. Nineteen isolates of phyllosphere bacteria were isolated from rice leaves, nine isolates were from Pasirkuda (Ciomas) and ten isolates were from Ciherang (Sindangbarang); eleven isolates were from rice phyllosphere and eight isolates were from endophyllosphere. Based on the age of the rice, two isolates were from two weeks old rice, nine isolates were from four weeks old rice and eight isolates were from eight weeks old rice. Phyllosphere bacteria significantly increased the plant height, upper parts biomass as well as root biomass. Six isolates were able to improve the growth of rice seedling IR-64 were Aureobacterium seperdae (two isolates), Arthrobacterium globiformis (one isolate) and Microbacterium lacticum (three isolates). Keywords: endophyllosphere, phyllosphere bacteria, rice cultivar IR-64

KEMAMPUAN BAKTERI DIAZOTROF ENDOFIT UNTUK MENINGKATKAN PERTUMBUHAN VEGETATIF BIBIT KELAPA SAWIT (Elaeis guineensis jacq) Andreas Panjaitan; Iswandi Anas; Rahayu Widyastuti; Wiwik Eko Widayati
Jurnal Ilmu Tanah dan Lingkungan Vol 17 No 1 (2015): Jurnal Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Endophytic diazotrophic bacteria are free-living atmospheric dinitrogen fixing bacteria that lived and colonized between living plant cells and do not contribute pathogenic effects to its host. The ability of endophytic diazotrophic bacteria in providing nitrogen as a nutrient for crop plays an important role in reducing the dependency of inorganic nitrogen fertilizer. The aim of this experiment was to study the ability of endophytic diazotrophic bacteria isolate to stimulate vegetative growth of oil palm seedlings at four levels inorganic nitrogen fertilizer application. Experiment was conducted at the greenhouse IPB Campus, Cikabayan, Darmaga with the altitude of 250 m above sea level and at the Soil Fertility Laboratory, the Departement of Soil Science and Land Resources, Faculty of Agriculture, Bogor Agricultural University (IPB) and at the Laboratory of Biotechnology, Indonesian Sugarcane Research Centre (P3GI) Pasuruan, East Java. This experiment using Completely Randomized Block Design (CRBD) consisted of two factors with three replications. The first factor was inorganic nitrogen levels consisted of four levels (0, 50%, 75% and 100% of the recommended dose). The second factor was inoculation with endophytic diazotrophic bacterial isolates consisted of four levels; without inoculation, inoculated with isolate 1, isolate 2 and isolate 3. The results of the experiment showed that the inoculation with bacterial isolate 2 without N fertilizer application gave the best results to increase the diameter of the palm weevil, palm height, and dry weight. In addition to that, the application of endophytic diazotrophic bacterial isolate was able to promote vegetative growth of palm oil seedling. Keywords: Endophytic diazotrophic bacteria, nutrient up-take, oil palm seedling, vegetative growth

Substitusi Pupuk Kimia pada Budidaya Padi SRI Pengaruhnya Terhadap Pertumbuhan, Produksi dan Organisme Tanah: Substitution of Inorganic Fertilizer In SRI Paddy Cultivation Effect on Growth, Production and Soil Organisms Rury Kurniawan; Iswandi Anas; Rahayu Widyastuti; Atang Sutandi
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 1 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Penelitian ini bertujuan mempelajari pengaruh budidaya SRI dibandingkan metode konvensional dengan berbagai taraf pemupukan terhadap pertumbuhan dan produksi padi serta mempelajari aktivitas dan populasi organisme tanah. System of Rice Intensification (SRI) merupakan inovasi dalam system budidaya padi yang masih berkembang terus namun telah mampu meningkatkan produksi. Penelitian ini dilaksanakan sejak Desember 2014 sampai dengan April 2015 pada lahan sawah irigasi kecamatan Pakem Kabupaten Sleman, Provinsi D.I Yogyakarta. Penelitian ini menggunakan rancangan split plot. Petak utama adalah metode budidaya padi SRI dan konvensional, dan sebagai anak petak adalah empat taraf pemupukan, yaitu pupuk anorganik dosis rekomendasi dan dikombinasi dengan pupuk organik serta pupuk organik hayati. Hasil penelitian menunjukkan tinggi tanaman, jumlah anakan, jumlah anakan produktif dan hasil panen pada budidaya SRI signifikan lebih tinggi dibandingkan budidaya konvensional. Metode budidaya SRI mampu meningkatkan hasil gabah lebih tinggi. Aktivitas dan populasi organisme tanah juga tidak menunjukan perbedaan yang nyata pada penerapan metode budidaya dan aplikasi pemupukan yang dilakukan. Kata kunci: Pertumbuhan, produksi dan organisme tanah, System of Rice Intensification (SRI)

Uji Fitopatogenitas, Hemolisis serta Kemampuan Mikrob dalam Melarutkan Fosfat dan Kalium: Test of Phytopathogenicity, Hemolysis and Microbial Ability in Solubilizing Phosphate and Potassium Desak Ketut Tristiana Sukmadewi; Iswandi Anas; Rahayu Widyastuti; Ania Cintaresmini
Jurnal Ilmu Tanah dan Lingkungan Vol 19 No 2 (2017): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Soil microbes have an important role in the cycle of phosphorus and potassium. Therefore, a multifunctional microbe is required to have two or more functions. Before a multifunctional test is performed, the microbes must be tested and confirmed, they are not pathogenic. The purpose of this research was to study phytopathogenicity, hemolysis and microbial ability in solubilizing phosphate and phosphate. The research procedure consisted of phytopathogenicity test, hemolysis test, the test of phosphate solubilizing ability on Pikovskaya solid medium and potassium solubilizing ability on Alexandrov solid medium. Based on the results of phytopatgonecity tests on bacteria and fungi, all isolates are non-phytopathogenic. From the hemolysis test of bacterial isolate BPK 2, BPK 6 and BPK 7 caused total hemolysis. Based on the hemolysis test of fungi isolate SSIO 6 caused total hemolysis, FPF E1 and JK 6 caused partial hemolysis. Isolate BPK 5 has the highest index in solubilizing potassium (1.375), while isolate BPF 9 has the highest index in solubilizing phosphate (1.533). Keywords: Microbe, multifunctional, pathogenicity, phosphate solubilizing, potassium solubilizing

Penggunaan Biochar dan Dekomposer dalam Proses Pengomposan Limbah Kulit Buah Kakao serta Pengkayaan Mikrob Pelarut Fosfat (MPF) untuk Meningkatkan Kualitas Pupuk Organik: Application of Biochar and Decomposers to the Composting Process of Cocoa Husk and Enrichment Using Phosphate Solubilizing Microbe to Improve the Quality Organic Fertilizer Haryanti Haryanti; Iswandi Anas; Dwi Andreas Santosa; Kurnia Dewi Sasmita
Jurnal Ilmu Tanah dan Lingkungan Vol 20 No 1 (2018): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

The use of cocoa husk waste by farmers is not optimal. In general, farmers only dispose of or immerse cocoa husk waste without processing it into quality organic fertilizer. This study aims to determine the influence of biochar and decomposers in accelerating the process of composting cocoa husk waste and improving the quality of organic fertilizers, and the effect of adding Phosphate Solubilizing Bacteria (BPF) to organic fertilizer derived from cocoa husk waste on the growth of cocoa seedlings (Theobroma cacao L.). The first phase of the research was carried out a factorial 2 factor design in the Completely Randomized Design i.e. Biochar (without biochar and 10% biochar from the dry weight of organic fertilizer materials), and Decomposers (without decomposers and decomposers of 100 g kg-1 of organic fertilizer). The second phase of the study used a 3-factor factorial design in a Completely Randomized Design i.e. type of organic fertilizer (without organic fertilizer, organic fertilizer, organic fertilizer and biochar), inoculant Phosphate Solubilizing Bacteria (BPF), (without BPF inoculants, BPF A inoculants and BPF B inoculants), and dose of P fertilizer (without P fertilizer, SP-36 fertilizer 1 g P2O5, SP-36 fertilizer 2 g P2O5, and natural phosphate fertilizer 2 g P2O5). The results showed that the administration of biochar and decomposers did not accelerate the composting process. Provision of biochar and decomposers increases levels of humic acid. Giving natural phosphate 2 g P2O5 / 2.2 kg BKM increases the height growth of cocoa seedlings. Application of organic fertilizer with biochar or without biochar on the inoculant treatment factors of BPF A and BPF B significantly increased the diameter of the cocoa seedling stem. Application of organic fertilizer increases the stem diameter, plant height, number of leaves of cocoa seedlings, root dry weight and dry weight of stem of cocoa seedlings.

Effect Carrier Materials of Bradyrhizobium sp. strain PZS_A08 on Growth of Indigofera zollingeriana Sanjaya, Wilhelmus Terang Arga; Kartika, Sari Yulia; Sukmadewi, Desak Ketut Tristiana; Widyastuti, Rahayu; Anas, Iswandi
JOURNAL OF TROPICAL SOILS Vol. 26 No. 2: May 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i2.95-103

Sustainable forage production is needed to meet animal feed needs as the livestock industry increases. The purpose of this study is to evaluate the effect of liquid and solid carrier material on the effectiveness and infectivity of Bradyrhizobium sp. strain PZS_A08 on the growth of Indigofera zollingeriana (I. zollingeriana). The two carrier materials used were zeolite (solid) and molasses (liquid). This study used two carrier materials consisting of zeolite (solid) and molasses (liquid). The five treatments given were P0 (50% NPK), P1 (50% NPK+liquid biofertilizer), P2 (50% NPK+sterile liquid biofertilizer), P3 (50% NPK+solid biofertilizer), P4 (50 % NPK+sterile solid biofertilizer), P5 (100% NPK). Observations were made on the plant's height, number of leaves, number of nodules, upperparts and root wet biomass, root and upper parts dry biomass, root length, and microbial population). The use of liquid and solid carrier materials effectively affected the effectiveness and infectivity of Bradyrhizobium sp. strain PZS_A08 on Â I. zollingeriana. Inoculants Bradyrhizobium sp. strain PZS_A08 significantly increased plants' growth and reduced the use of 50% NPK fertilizer. Cold storage temperature (5ÂºC) effectively maintained Bradyrhizobium sp. strain PZS_A08 on liquid and solid carriers, while solid carriers showed better effectiveness at room temperature storage (30oC). Through this research, solid carriers such as zeolite are recommended as carriers for Bradyrhizobium sp. filter PZS_A08.

Co-Authors , Suprihati , Triadiati A Noeralam Agung Dhamar Syakti Anak Agung Istri Sri Wiadnyani Andreas Panjaitan Ania Cintaresmini Arum Asiyanti Suhastyo, Arum Asiyanti Arzyana Sunkar Atang Sutandi Bariot Hafifa Batara, Lily Noviani Charlena D.A Santosa DWI ANDREAS SANTOSA Edi Santosa Erniwati Erniwati Ervizal AM. Zuhud Fakhrur Razie Gunawan Djajakirana Haryanti Haryanti Ishak, Ishak J. L. O. Tampubolon Kartika, Sari Yulia Kurnia Dewi Sasmita Lukman Gunarto Mas?ud, Zainal Alim Miftahudin . Moh. Yani Mutiara Dewi Puspitawati N Handayani Nelvia Nelvia Nurrobifahmi, Nurrobifahmi Nurul Hidayati Nurul Hidayati RAHAYU WIDYASTUTI Rina D. Ningsih Rury Kurniawan Sanjaya, Wilhelmus Terang Arga Setiadi, Yadi Sitanala Arsyad SUBOWO GITOSUWONDO Sugiyanta Sugiyanta . Sukmadewi, Desak Ketut Tristiana Suyamto Suyamto Violita Violita Wiwik Eko Widayati Yadi Setiadi Yadi Setiadi YANTO SANTOSA YULIN LESTARI Zainal Alim Mas’ud

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