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

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IMPACT OF BRACHIARIA, ARBUSCULAR MYCORRHIZA, AND POTASSIUM ENRICHED RICE STRAW COMPOST ON ALUMINIUM, POTASSIUM AND STABILITY OF ACID SOIL AGGREGATES Hafifa, Bariot; Sabiham, Supiandi; Anas, Iswandi; Sutandi, Atang Sutandi; Suyamto, Suyamto
Indonesian Journal of Agricultural Science Vol 13, No 1 (2012): April 2012
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Acid soil is commonly grown with cassava, which in general, tolerate low soil  fertility and aluminum (Al) toxicity. However, without any improvement efforts such soil will become worse. Intercropping cassava with Brachiaria decumbens (BD) which adapts to acid soil and tolerates low fertility soils as well as application of arbuscular mycorrhiza (AM) and organic matters are among the important efforts to rehabilitate this soil. The experiment was conducted to  examine the impact of BD, AM, and potassium (K) enriched rice straw compost on exchangeable Al, available K, and stability of soil aggregates. Experiment was arranged in a completely randomized design with three factors and three replications. The first factor was BD as cassava intercropping, the second factor was AM, and the third factor was 2 t ha-1 rice straw compost enriched with 0 kg, 50 kg, 100 kg, and 200 kg KCl ha-1. Brick pots (1 m length x 1 m width x 0.45 m depth) filled with Kanhapludult soil was used for growing cassava in which row of BD was planted at 60 cm from cassava stem. K-enriched rice straw compost and AM (10 g per stem) were applied around cassava stem at 2 and 12 days after planting, respectively. BD was cut every 30 days and the cutting was returned to the soil. Soil exchangeable Al was analyzed at 0, 3, 6 and 9 months after planting (MAP), while Al and K contents as well as aggregate stability were measured at 6 MAP. The results showed that planting BD decreased 33% exchangeable Al, which means that the root exudates of this grass was effective in detoxifying Al3+. Treatment of BD and/or in combination with AM was effective in preserving K added to the soil, increasing total polysaccharides, and improving soil aggregate stability. This indicated that planting BD and applying AM and Kenriched rice straw compost improved acid soil fertility, and therefore can be recommended in cassava cultivation.
Soil Biology Contribution on Agricultural Land Suitability Evaluation of Wet Tropical Megabiodiversity Regions GITOSUWONDO, SUBOWO; SANTOSA, EDI; ANAS, ISWANDI
Jurnal Sumberdaya Lahan Vol 4, No 02 (2010): Desember 2010
Publisher : Indonesian Center for Agriculture Land Resource Development

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Abstract

Indonesia is in the region "wet tropical megabiodiversity" it would need to complete the system  for agricultural land suitability evaluation in accordance with real conditions, thus increasing the value-added resources optimally and sustainable and accountable production investment. Soil organisms as a component of production support can act as an agent of energy and nutrient cycling in the soil, improving soil physical properties, and controlling pests and disease. For that soil, biological parameters that need to be considered in evaluating the suitability of land that already exist include: N-fixing or P-solubilizing bacteria groups that live symbiosis and free-living, the fungi solubilizing P and soil organic matter decomposition groups, BGA fixing and free-living N symbiotic groups, fauna groups are able to conserve soil organic matter and improve soil physical properties. Important steps that need to be done in the evaluation of land cover inventory of soil biological populations and its role on the growth of crops, and evaluate the suitability of the soil biological parameters of the functional value of commodity options.
Perubahan Fraksi P-Inorganik dan P-Organik Pada Bahan Tanah Gambut Yang Diaplikasi Dengan Fosfat Alam Pada Kondisi Kapasitas Lapang dan Tergenang , Nelvia; Sabiham, Supiandi; Anas, Iswandi
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

The very high acidity of peat soil is mainly caused by high H+ concentration that can change the base cation likeK , Na+, Ca+ and Mg2+ from mineral/rock structure. The research was conducted in laboratory of the Departement ofSoil Science, Faculty of Agriculture, IPB. Peat soils at hemic degree of decomposition level were taken from Riau. Rockphosphates in this research (P and Fe sources) were the rock phosphates of Huinan China, Christmas Island and PTPetrokimia Gresik the content 32,65; 31,28 and 25,02% of P 2 O 5 and 2,28; 11,19 and 18,72% of R 2 O 3 (Fe 2 O 3 + Al 2 O 3 )respectively. The aims of the research were to study the changes of the forms of readily labile inorganic-P and organic-P,moderately labile inorganic-P and organic-P and non labile organic-P in peats after being incubated with rockphosphates. The results showed that the application of rock phosphates in peat soil increased the readily of labileinorganic-P and organic-P, moderately inorganic-P and organic-P, and non labile P forms. An increase of non labile Pand moderately labile P were higher dye to the R 2 O 3 content of rock phosphates became higher in saturated and fieldcapacity condition. The results also showed that the rock phosphates applied to the peat soil released P in a very highamounts, in the order of rock phosphates of Huinan China > Christmas Island > PT Petrokimia Gresik. Released P wasdetermined by water extraction which increased with the periods of incubation with the similar pattern on the three typesof rock phosphates.
PRODUKSI GAS KARBON DIOKSIDA SELAMA PROSES BIOREMEDIASI LIMBAH HEAVY OIL DENGAN TEKNIK LANDFARMING Charlena, Charlena; Mas?ud, Zainal Alim; Anas, Iswandi; Setiadi, Yadi; Yani, Moh.
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.66

Abstract

Bioremediation is defined as biological degradation process of organic or inorganic wastes in a controlledcondition to control and reduce their amount in the environment. In this study, the soil which had been polutedby heavy petroleum oil fractions, i.e. heavy oil waste (HOW), was used as sample. The bioremediationtechnique used in this study is an ex-situ technique. This study was conducted to determine the amount ofproduced CO2 gas during the HOW degaradation process. Treatment of heavy oil waste with biostimulation andbioaugmentation. Production of CO2 gas were placed in impiger and analysis with titrimetry method. The highestCO2 production mean was obtained from the bioaugmentation treatment with compost adding, i.e. 244,5 mg/m3.Generally, graphs CO2 gas production followed a similar sinusoidal pattern. From these results it can beinfered that the degradation process of HOW happened during the treatments in aerobic condition.
SOIL BIOLOGY CONTRIBUTION ON AGRICULTURAL LAND SUITABILITY EVALUATION OF WET TROPICAL MEGABIODIVERSITY REGIONS GITOSUWONDO, SUBOWO; SANTOSA, EDI; ANAS, ISWANDI
Jurnal Sumberdaya Lahan Vol 4, No 2 (2010)
Publisher : Indonesian Center for Agriculture Land Resource Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.297 KB) | DOI: 10.21082/jsdl.v4n02.2010.%p

Abstract

Indonesia is in the region "wet tropical megabiodiversity" it would need to complete the system  for agricultural land suitability evaluation in accordance with real conditions, thus increasing the value-added resources optimally and sustainable and accountable production investment. Soil organisms as a component of production support can act as an agent of energy and nutrient cycling in the soil, improving soil physical properties, and controlling pests and disease. For that soil, biological parameters that need to be considered in evaluating the suitability of land that already exist include: N-fixing or P-solubilizing bacteria groups that live symbiosis and free-living, the fungi solubilizing P and soil organic matter decomposition groups, BGA fixing and free-living N symbiotic groups, fauna groups are able to conserve soil organic matter and improve soil physical properties. Important steps that need to be done in the evaluation of land cover inventory of soil biological populations and its role on the growth of crops, and evaluate the suitability of the soil biological parameters of the functional value of commodity options.
APLIKASI MIKROORGANISME LOKAL (MOL) DIPERKAYA MIKROB BERGUNA PADA BUDIDAYA PADI SYSTEM OF RICE INTENSIFICATION (SRI) ORGANIK Batara, Lily Noviani; Anas, Iswandi; Santosa, Dwi Andreas; Lestari, Yulin
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 40, No 1 (2016)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v40n1.2016.71-78

Abstract

Abstrak. Mikroorganisme Lokal (MOL), suatu cairan bahan organik yang ditambahkan gula merah atau molase, berperan untuk meningkatkan pertumbuhan dan produksi serta mengatasi masalah hama dan penyakit tanaman padi pada System of Rice Intensification (SRI) organik. Sifat MOL sangat beragam dan sering tidak mengandung mikrob berguna. Tujuan penelitian ini adalah untuk (i) mengevaluasi kualitas berbagai macam MOL, (ii) memperbaiki kualitas MOL dengan menambahkan mikrob berguna, serta (iii) menguji pengaruh MOL yang diperbaiki kualitasnya terhadap pertumbuhan dan produksi tanaman padi dengan metode SRI organik. Pengujian kualitas dan perbaikan kualitas MOL dilakukan di Laboratorium dan di lapang di Desa Ciasihan, Kecamatan Pamijahan, Kabupaten Bogor, Jawa Barat. Mikrob berguna yang digunakan untuk memperbaiki kualitas MOL yaitu Azotobacter sp., Azospirillum sp., bakteri pelarut fosfat, dan Trichoderma harzianum. Hasil penelitian menunjukkan bahwa kualitas MOL yang diproduksi oleh petani sangat beragam sifat fisik, kimia dan biologinya. Kandungan unsur hara N paling tinggi terdapat pada MOL krokot 0,15%, unsur hara P pada MOL krokot dan nasi 0,06%, sementara unsur hara K pada MOL rebung 0,63%. Pembuatan MOL secara kuantitatif dan penambahan mikrob berguna ke dalam MOL mampu meningkatkan kualitas MOL yang dapat dilihat dari peningkatan pertumbuhan dan hasil tanaman padi. Jumlah anakan MOL rebung diperkaya mikrob berguna 42 batang rumpun-1 lebih tinggi bila dibandingkan dengan perlakuan MOL rebung 39 batang rumpun-1. Jumlah gabah dengan MOL rebung diperkaya mikrob berguna rata-rata 148,5 gabah malai-1, lebih tinggi dibandingkan dengan MOL rebung 142,5 gabah malai-1. Berat gabah kering panen MOL rebung diperkaya mikrob 10,7 t ha-1, lebih tinggi bila dibandingkan dengan MOL rebung setinggi 9,3 t ha-1.Abstract. Indigenous Microbes (IMO), an organic liquid product enriched with palm sugar or molasses, can be used to improve the growth and yield as well as to protect plants from pest and diseases in the Organic System of Rice Intensification (SRI). IMO characteristics vary and some do not contain beneficial microbes. This research was aimed to (i) evaluate the quality of IMO, (ii) to improve IMO quality by enriching with beneficial microbes and (iii) to evaluate the effects of enriched IMO on rice growth and yield under the Organic SRI. Chemical, physical and biological properties of IMO were evaluated at the Laboratory and the field trial was performed at Ciasihan village, Pamijahan District, Bogor, West Java. Benefical microbes used to improve the quality of IMO were Azotobacter sp., Azospirillum sp., phosphate solubilizing bacteria and Trichoderma harzianum. The results of this study showed that the physical, chemical and biological properties of IMO produced by farmers varied. Purslane IMO was highest in N content (0.15%), P content in purslane and rice IMO was 0.06% while K content in bamboo shoot IMO was 0.63%. Quantitative preparation of IMO and enrichment with beneficial microbes is necessary to improve its quality as can be observed from the improvement of rice growth and yield. Numbers of tillers of bamboo shoots of IMO enriched with beneficial microbes was 42 tillers hill and was higher compared to the treatment of bamboo shoots IMO without microbe enrichment which was 39 tillers hill-1. The number of rice grain under bamboo shoot IMO enriched beneficial microbes was 148.5 grains panicle-1 which was higher than that of the bamboo shoot IMO without enriched beneficial microbes of 142.5 grains panicle-1. Grain yield under bamboo shoot IMO enriched beneficial microbes was also higher, i.e. 10.7 t ha-1, which was higher compared to bamboo shoots IMO without enriched beneficial microbes of 9.3 t ha-1.
PENGARUH METODE STERILISASI IRADIASI SINAR GAMMA CO-60 TERHADAP BAHAN PEMBAWA DAN VIABILITAS SPORA GIGASPORA MARGARITA Nurrobifahmi, Nurrobifahmi; Anas, Iswandi; Setiadi, Yadi; Ishak, Ishak
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 41, No 1 (2017)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v41n1.2017.1-8

Abstract

Abstrak. Proses sterilisasi digunakan untuk menghilangkan atau mengurangi mikroba yang tidak diinginkan terdapat di dalam bahan pembawa. Tujuan penelitian ini adalah untuk melihat pengaruh jenis sterilisasi terhadap viabilitas spora G. margarita  dan ketersediaan Fe2+, Mn2+, Zn2+ di dalam bahan pembawa zeolit, kompos dan tanah. Hasil penelitian menunjukkan bahwa sterilisasi autoklaf, radiasi sinar gamma dosis 40 dan 50 kGy mampu mensterilkan bahan pembawa di zeolit sampai 0 cfu/g, sedangkan pada bahan pembawa kompos yang diradiasi dengan sinar gamma dosis 50 kGy mampu mengurangi mikroba sebanyak 76 kali dibandingkan dengan menggunakan sterilisasi autoklaf. Pada penyimpanan 1 bulan pasca sterilisasi menggunakan autoklaf pada zeolit viabilitas spora G. margarita tertinggi sebesar 46.95%, sedangkan untuk kompos viabilitasnya tidak ada yang hidup. Pada penyimpanan 3 bulan pasca sterilisasi pada radiasi dosis 10 kGy pada zeolit viabilitas spora G. margarita tertinggi sebesar 45.81%, sedangkan pada kompos viabilitasnya tidak ada yang hidup. Jenis sterilisasi menunjukkan pada bahan pembawa zeolit dan tanah tidak berpengaruh signifikan sedangkan pada kompos berpengaruh signifikan terhadap Fe2+. Sterilisasi dengan radiasi dosis 50 kGy pada bahan pembawa zeolit berpengaruh signifikan terhadap Mn2+. Sterilisasi dengan autoklaf pada tanah berpengaruh signifikan terhadap Mn2+. Jenis sterilisasi pada bahan pembawa tanah tidak berpengaruh signifikan terhadap Zn2+ sedangkan pada zeolit dan kompos berpengaruh signifikan  terhadap Zn2+ .Abstract. Sterilization is one of technique to remove or minimize undesirable microbe that found in the carrier material. This present study aimed to reveal the effect of sterilization techniques on viability G. margarita spore and availability of Fe2+, Mn2+, Zn2+ contained in carrier material, compost and soil. The result of the study showed that autoclave sterilization,  gamma ray radiation with dose of 40 and 50 kGy were able to sterilize carrier material in zeolite up to 0 cfu/g, while in the carrier material of irradiated compost with dose of 50 kGy was able to decrease amount of microbe as much as 76 times compared to autoclave sterilization. After one month incubation period, the autoclave sterilization on zeolite gave the highest spore viability, with 46.95%, while autoclave sterilization on compost gave the spore viability nothing live. At the 3 months post-incubation, sterilization using irradiation dose of 10 kGy on zeolite gave the highest spore viability with 45.81%, while the compost spore viability nothing live. The type sterilization had no effect on carrier material of zeolite and soil but had an effect on Fe2+ contained on compost . Sterilization using irradiation dose of 50 kGy on the zeolite?s carrier material was significantly affecting the Mn2+.  As well as soil sterilization using autoclave the type sterilization on Zn2+ had  no effect on soil?scarrier material, whereas it had its effect on Zn2+ from the zeolite and compost. Mycorrhiza Carrier Materials; Sterilization; Gamma Ray Irradiation Co-60
Isolation, Selection and Identification of Polyaromatic Hydrocarbons (PAHs) Degrading Bacteria from Heavy Oil Waste (HOW)-Contaminated Soil Yani, Mohamad; Charlena, Charlena; Mas?ud, Zainal Alim; Anas, Iswandi; Setiadi, Yadi; Syakti, Agung Dhamar
HAYATI Journal of Biosciences Vol. 27 No. 2 (2020): April 2020
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.935 KB) | DOI: 10.4308/hjb.27.2.142

Abstract

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.
Fine Root Production and Decomposition in Lowland Rainforest and Oil Palm Plantations in Sumatra, Indonesia Violita Violita; Triadiati Triadiati; Iswandi Anas; Miftahudin Miftahudin
HAYATI Journal of Biosciences Vol. 23 No. 1 (2016): January 2016
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (871.548 KB) | DOI: 10.4308/hjb.23.1.7

Abstract

Transformation of tropical rainforest into oil palm plantation not only has impacts on biodiversity but also affects ecosystem functions such as production and decomposition of fine roots as a nutrient source for plant. The objective of the research was to evaluate the production and decomposition rate of fine roots in natural forest (NF) at Bukit 12 National Park and oil palm plantation (OP) in Jambi, Sumatra. The soil core and litter bag methods were used to obtain fine root production and decomposition data. The results showed that generally, there was the same pattern in fine root production between NF and OP. The annual fine root productivity was found to be higher in NF than that of OP. Rainfall in NF and air temperature in NF and OP were the most significant climate factors affecting fine root production. The remaining fine root biomass decreased as the incubation time increased. The decomposition rate constant (k value) was significantly higher in NF than in OP. Our data showed that the nutrient turn-over of NF fine roots was faster than of OP fine roots. Nitrogen, carbon content, and C/N ratio were the main factors that influenced fine root decomposition.
Photosynthesis and Transpiration Rates of Rice Cultivated Under the System of Rice Intensification and the Effects on Growth and Yield Nurul Hidayati; . Triadiati; Iswandi Anas
HAYATI Journal of Biosciences Vol. 23 No. 2 (2016): April 2016
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (503.222 KB) | DOI: 10.4308/hjb.23.2.67

Abstract

The system of rice intensification (SRI) crop management method has been reported by many authors to significantly increase rice yield with lower inputs, but physiological bases of yielding improvement has not been studied. In this research we assessed some physiological parameters and the mechanism of rice yield improvement of rice plants under SRI cultivation method during both vegetative and generative phases compared to conventional rice cultivation methods. We measured photosynthetic rate, transpiration rate, leaf temperature, chlorophyll content, N and P uptake, plant growth parameters and yield for those comparison. SRI methods significantly increased both vegetative and reproductive (generative) parameters of rice plants compared to conventional cultivation methods. Photosynthetic rate, chlorophyll content, N and P uptake under SRI cultivation were significantly higher compared to those of the conventional rice cultivation, but no differences were found in transpiration rate and leaf temperature. With SRI method, plants in their generative phase (especially in the grain-filling phase) had the highest photosynthetic and the lowest transpiration rates. Grain yield under SRI method was significantly higher (ca. 24%) than that of conventional method.
Co-Authors , 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 Gunawan Djajakirana Haryanti Haryanti Ishak, Ishak Kartika, Sari Yulia Kurnia Dewi Sasmita Mas?ud, Zainal Alim Miftahudin . Moh. Yani Mutiara Dewi Puspitawati N Handayani Nelvia Nelvia Nurrobifahmi, Nurrobifahmi Nurul Hidayati Nurul Hidayati RAHAYU WIDYASTUTI Rury Kurniawan Sanjaya, Wilhelmus Terang Arga Setiadi, Yadi Sitanala Arsyad SUBOWO GITOSUWONDO Sugiyanta Sukmadewi, Desak Ketut Tristiana Suprihati Suyamto Suyamto Violita Violita Wiwik Eko Widayati Yadi Setiadi Yadi Setiadi YANTO SANTOSA YULIN LESTARI Zainal Alim Mas’ud