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Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)

jtanah
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Published by Institut Pertanian Bogor

ISSN : 14107333 EISSN : 25492853 DOI : -

Core Subject : Agriculture, Social,

Agriculture, Biological Sciences & Forestry Environmental Science

Jurnal Ilmu Tanah dan Lingkungan merupakan media yang menyajikan artikel mengenai hasil penelitian dan telaah perkembangan mutakhir dalam bidang ilmu tanah, air, dan ilmu lingkungan sebagai bahan kajian utama.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah

Articles 6 Documents

Search results for , issue "Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan" : 6 Documents clear

KARAKTERISTIK PEDOLOGI DAN PENGELOLAAN REVEGETASI LAHAN BEKAS TAMBANG NIKEL: STUDI KASUS LAHAN BEKAS TAMBANG NIKEL POMALAA, SULAWESI TENGGARA Widiatmaka Widiatmaka; Suwarno Suwarno; Nandi Kusmaryandi
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Post-mining land management needs to be done by taking into account a holistic approach concerning the improvement of physical, chemical and biological properties of soil as growth media, in order to support the rehabilitation plans. The objective of this study were: (i) to conduct quantitative and comprehensive an inventory of pedological properties of nickel post mining land, (ii) to analyze the potential and limitations of post mined land, (iii) act designed environmental management, based on the characteristics of the revegetation of the land and the environment. The results showed that the soil in Pomalaa could be classified in Typic Hapludox, clayey, mixed, isohypertermic (P1) dan Typic Hapludalfs, loamy, mixed, isohypertermic (P2), while the material in ex mining area are overburden or parent material. The soil has developed from peridotite and peridotite-serpentinite ultramafic material. This soil has low natural fertility and require efforts to improve the physical properties. Ex-mining area has a high rate of erosion. Poor tree growth in revegetation area has been determined caused by a deficiency of Ca, Fe, Cu, or Mn. The possibility of Ni and Cr toxicity in plants needs to be further investigated. Local resources in the form of slag can be used for revegetation, especially converter slag. The results obtained from this study can be used to give the advice of post-nickel mining land management, based on land characteristics. A better management advice covers two issues, namely improvements of the management action actually implemented and improvements in technical rehabilitation.Keywords: Pedological processes, post nickel mining land, revegetation

KAJIAN PENGARUH SITU TERHADAP RESPON HIDROLOGI DI DAS PESANGGRAHAN MENGGUNAKAN MODEL HEC-HMS Selamet Kusdaryanto; Dwi Putro Tejo Baskoro; Suria Darma Tarigan
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Pesanggrahan river with total extent of watershed about 13,384 ha is one of rivers flowing through Jakarta City that causes flood problem every years. Many effort has been done to reduce flood problem, among others is to build reservoir in watershed, but the effectiveness of reservoir is still questionable. A research aimed to analyze gap of reservoir capacity changes and its influence on hydrological response and to arrange the scenario of reservoir capacity change to improve hydrological response in Pesanggrahan Watershed was done using HEC-HMS Model. Reservoir capacity change scenarios applied to the actual rainfall condition and designed rainfall condition with a certain recurrence interval. The scenarios consist of: reservoir with the exsisting condition (scenario 1), increase depth of reservoir to 5 meters (scenario 2) and build 6 reservoirs on Pesanggrahan watershed (scenario 3). The model was calibrated using daily discharge data from the date of January 10th to April 30th 2009. Model calibration result shows that model is quite accurate to predict peak discharge in Pesanggrahan Watershed with Nash-Sutcliffe efficiency value = 0.9817 and R2 =0.975. Simulation results showed that the reservoir is effective in decreasing its local effect to peak discharge (reservoir area). The presence of reservoir with existing condition reduce only 6.38 % of the peak run off in outlet Kebon jeruk, whereas building of 6 reservoir will reduce 24.6 % of the peak run off in outlet Kebon jeruk.Keywords : HEC-HMS Model, peak discharge, Reservoir capacity change

KARAKTERISTIK LAHAN PADA PERTANAMAN DUKU (Lansium Domesticum Corr) DI PROVINSI JAMBI Hendri Purnama; Atang Sutandi; Widiatmaka Widiatmaka; Komarsa Gandasasmita
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Duku is one of horticultural crops and tropical fruits that has high commercial value. Government of Jambi Province intends to maintain and develop duku through crop improvements and extensification. For that purpose it needs to understand crop requirement related to land characteristic. The aims of this research were to identify land characteristics that associated to duku productivity, describe the optimum land characteristics to support maximum duku productivity, and to investigate the significance influence of land characteristics on optimum duku productivity. The study used primary and secondary data. Primary data was collected through field surveys, including biophysical properties and crop productivity. Secondary data included climate and duku distribution in Jambi Province. Data analysis were used line boundary method analysis and discriminant analysis. Biophysical properties and productivity were plotted on scatter diagram and the distribution of points form a model of the boundary line. The model of the biophysical properties and production relationship could determine land characteristics that associated with optimum productivity. The optimum productivity was associated with soil texture of sandy clay, sandy clay loam, loam, and clay loam, soil depth > 56 cm, soil pH between 4.5 to 6.4, C organic content > 0.60%, CEC was > 16.0 cmol kg-1, base saturation was > 5%, available P was > 1.50 ppm, exchangeable K content > 0.50 cmol kg-1, and Al saturation was < 43%. The discriminant analysis showed that the soil pH had the highest contribution on duku productivity.Key word: Boundary line, Duku, land characteristic, productivity

APLIKASI PUPUK ANORGANIK DAN ORGANIK HAYATI PADA BUDIDAYA PADI SRI (System of Rice Intensification) Muchlis Muhammad Bakrie; Iswandi Anas; Sugiyanta Sugiyanta; Komaruddin Idris
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Excessive use of inorganic fertilizers mainly NPK causes soil degradation, environment pollution, decreases production, and reduces soil biological activity. System of rice intensification is one method of rice cultivation. SRI main principles are seed transplanting at young age (7-11 days old), transplanting use single seedling methode, seedlings at wide plant spacing ≥ 25x25 cm, intermittent irrigation and field conditions are not flooded, and reduction of chemical fertilizers and application of organic fertilizer. This research was conducted at Situgede Village, West Bogor District, Bogor. The research design was split plot randomized complete block design with three blocks. Two rice cultivation system as the main plot and five combinations of fertilizer application as sub plot. In the main plot consisted of two rice cultivation which is conventional and SRI while the subplot consisted of five combinations of fertilizer application is no fertilition, 100% inorganic fertilizers (Urea = 250 kg ha-1, SP-36 = 75 kg ha-1 and KCl = 50 kg ha-1), 75% inorganic fertilizers (Urea = 187 kg ha-1, SP-36 = 56.8 kg ha-1 and KCl = 37.5 kg ha-1) + 200 kg of bio-organicfertilizer, 50% inorganic fertilizers (Urea = 125 kg ha-1, SP-36 = 37.5 kg ha-1 and KCl = 25 kg ha-1) + 200 kg of bio-organicfertilizer and 50% inorganic fertilizers (Urea = 125 kg ha-1, SP-36 = 37.5 kg ha-1 and KCl = 25 kg ha-1). The results showed that SRI method produced maximum number of tillers higher that of 25.8 tillers/hill or an increase of 64.33% compared with conventional methods. Wet and dry shoot weight of wet and dry weight of root is greater in successive SRI method of 13.3%, 19.1%, 1.40% and 41.8% compared with the conventional method. The number of productive tillers, grain number/panicle, 1000 grains weight, root wet weight and dry grain at SRI method was higher than those in conventional method respectively 58.6%, 37.0%, 2.50%, 25.1% and 32.6%. The uptake of N and P in the SRI method higher at 72.0% and 100% compared to conventional method. Application 50% inorganic fertilizer + 200 kg bio-organic fertilizer, producing more fresh weight biomass, plant dry weight, wet weight and dry weight, number of productive tillers, 1000 grain weight respectively 13.9%, 42.0%, 49.8%, 74.0%, 10.7% and 2.48% compared with the dosage recommendations dose or 100% inorganic fertilizer. N, P and K uptake at 50% inorganic fertilizer + 200 kg of bio-organic fertilizer treatment higher (55.6%, 66.7% and 46.2%) than the full recommendation dose of inorganic fertilizer. Bio-organic fertilizer can be used as substitute of NPK fertilizer.Keywords : Bio-organic fertilizer, inorganic fertilizer, System of Rice Intensification (SRI)

PRODUKSI MASAL INOKULUM AZOTOBACTER, AZOSPIRILLUM DAN BAKTERI PELARUT FOSFAT DENGAN MENGGUNAKAN MEDIA ALTERNATIF Richard Gunawan; Iswandi Anas; Fahrizal Hazra
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Azotobacter, Azospirillum and phosphate solubilizing bacteria are the most common microbial inoculants used as biofertilizer. To have good quality of biofertilizer, the high number of inoculant cells and suitable carriers as well as the method of carrier sterilization are among the most important factors determined the quality of biofertilizer. Related to the number of inoculant cells in carriers, the growing medium used to cultivate the microbial cells play very important role. For mass production of microbial cells, the medium should be able to support fast growth of microbial cells. The price of medium should be reasonably cheap and the materials used in medium should be available easily. The purpose of this study was to obtain a cheap growing medium that can support high number of microbial inoculant cells and the components of the medium should be easyly obtain and the price is not expensive. The study was conducted at the Department of Soil Science and Land Resources, Faculty of Agriculture, Bogor Agricultural University (IPB). The results showed that the medium IPB RI-1 was able to support the growth of 1010 cfu ml-1 Azotobacter, 108 cfu ml-1 Azospirillum and 109 cfu ml-1 Phosphate Solubilizing Bacteria. The number of bacterial cells in Nutrient Broth medium was only 108 cfu ml-1. This means that the IPB RI-1 medium was able to produce 100-fold population of Azotobacter compared to the growth of this bacterium in Nutrient Broth and Phosphate Solubilizing Bacteria was 10-fold higher than population in Nutrient Broth medium. The costs of the IPB RI-1 and IPB RI-2 were much cheaper compared to the cost of Nutrient Broth medium. The cost of medium IPB RI-1 only 3% (IDR 945) and IPB RI-2 about 2% (IDR 690) of the cost of Nutrient Broth medium (IDR 27,752) per liter medium in the year of 2010.Keywords : Alternative media, Azotobacter, Azospirillum, Nutrient Broth, Phosphate Solubilizing Bacteria

KAJIAN POLA PEMANFAATAN RUANG DI KABUPATEN GARUT BERBASIS DAYA DUKUNG LINGKUNGAN HIDUP Ardhy Firdian; Baba Barus; Didit Okta Pribadi
Jurnal Ilmu Tanah dan Lingkungan Vol 12 No 2 (2010): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Enviromental carrying capacity was measured in three methods,i.e land capability, land carrying capacity and water carrying capacity. Garut Regency which is located at the upstream Cimanuk Watershed has an important role in the sustainability of capacity for downstream area. The aims of this study are: (1) to identify land use in Garut Regency in 2009, (2) to identify land capability in Garut Regency, (3) to assess the suitability of land use with land capability and space pattern in Garut Regency, (4) to identify the status of environmental carrying capacity in Garut Regency, and (5) to set a space pattern based on environmental carrying capacity. Based on the interpretation of Landsat Satellite Imagery in 2009, dryland agriculture has dominated the coverage about 45.4% and forest cover about 23.8%. This study also shows that most area in Garut Regency is belong to Class IV land capability (36.4% of the regency area) without Class I of land capability. Suitabilty evaluation between land cover and land capabilty describe that 48,45% area is suitable, 50.4% area is not suitable and 1.18% area is conditionally suitable depending on limitation factors that affect land capability. Another evaluation between space patern and land capability shown that 59.0% area is suitable, 32.1% area is not suitable, and 8.84% area is conditionally suitable. Both status of land carrying capacity and water carrying capacity are deficit. According to spatial pattern based on land capability and existing forest, space that can be use as the preservation area is about 58.5% of the area, and space that can be use as the cultivation area is about 41.5% of the area of Garut Regency.Keywords : Land capability, land cover/use, spatial pattern, water carrying capacity

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