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All Journal HAYATI Journal of Biosciences CHEMISTRY PROGRESS Jurnal Agro Teknologi Tropika Indonesian Journal of Agricultural Science Jurnal Sumberdaya Lahan Jurnal Sumberdaya Lahan
Iswandi Anas
Departemen Ilmu Tanah dan Sumberdaya Lahan Fakultas Pertanian Insttut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Chemistry Earth & Planetary Sciences

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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.
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.
Co-Authors Agung Dhamar Syakti Anak Agung Istri Sri Wiadnyani Arum Asiyanti Suhastyo, Arum Asiyanti Atang Sutandi Bariot Hafifa Charlena DWI ANDREAS SANTOSA Edi Santosa Mas?ud, Zainal Alim Moh. Yani Nelvia Nelvia SUBOWO GITOSUWONDO Suprihatin, Mohammad Yani, dan Dewi Ratnasari Suyamto Suyamto Yadi Setiadi YULIN LESTARI