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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 301 Documents

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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

Analisis Risiko Gempabumi di Cilacap Provinsi Jawa Tengah: Earthquake Risk Analysis in Cilacap, Central Java Province Muhaimin Muhaimin; Boedi Tjahjono; Darmawan Darmawan
Jurnal Ilmu Tanah dan Lingkungan Vol 18 No 1 (2016): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Gempabumi merupakan kejadian yang datangnya secara tiba-tiba. Hingga kini kejadian gempa bumi tersebut masih belum dapat diprediksi kedatangannya. Wilayah yang berdekatan dengan jalur subduksi pada umumnya merupakan wilayah yang rawan terhadap bencana gempabumi, seperti Kabupaten Cilacap yang berada di pesisir selatan Pulau Jawa. Gempabumi Tasikmalaya yang terjadi tanggal 2 September 2009, dengan magnitudo M 7.3 terbukti telah berdampak besar terhadap wilayah Kabupaten Cilacap. Hal ini yang membuat perlunya penelitian risiko gempabumi di wilayah Cilacap. Studi bahaya gempabumi dan kerentanan akan sangat mendukung untuk penilaian risiko maupun program mitigasi. Penelitian ini bertujuan untuk melakukan analisis dan pemetaan bahaya, kerentanan, dan risiko gempabumi di kota Cilacap. Metode untuk analisis bahaya gempabumi menggunakan nilai percepatan tanah maksimum di permukaan (PGAM) dari hasil metode probabilistik. Untuk kerentanan gempabumi ditentukan berdasarkan jenis penggunaan lahan. Adapun untuk perhitungan risiko bencana gempabumi digunakan persamaan R = H × V. Berdasarkan hasil analisis bahaya, didapatkan bahwa seluruh Kota Cilacap tergolong ke dalam kelas bahaya sedang dengan nilai PGAM bervariasi dari 0.405 – 0.494 gal. Berdasarkan hasil analisis kerentanan, diperoleh bahwa kerentanan tinggi terdapat di penggunaan lahan permukiman yang meliputi Desa-desa Tambakreja, Sidanegara, Donan, Tritih Kulon bagian selatan, Cilacap, Mertasinga, dan Kamulyan. Adapun hasil analisis risiko menunjukkan bahwa kelas risiko tinggi di daerah penelitian meliputi area seluas 3,237.40 ha yang terdapat di Desa-desa Lomanis, Tambakreja, Tritih Kulon, Sidanegara, Donan, Mertasinga, dan Cilacap, sehingga di desa-desa tersebut perlu mendapat perhatian dan prioritas untuk program mitigasi bencana ke depan. Kata kunci: Kota Cilacap, risiko gempabumi, percepatan tanah maksimum di permukaan, metode probabilistik

Comparison of Three Models for Predicting The Spatial Distribution of Soil Organic Carbon in Boalemo Regency, Sulawesi: Comparison of Three Models for Predicting The Spatial Distribution of Soil Organic Carbon in Boalemo Regency, Sulawesi Eloise Mason; Yiyi Sulaeman
Jurnal Ilmu Tanah dan Lingkungan Vol 18 No 1 (2016): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Information on the spatial distribution of soil organic carbon content is required for sustainable land management. But, creating this map is time-consuming and costly. Digital soil mapping methodology makes use of legacy soil data to create provisional soil organic carbon map. This map helps soil surveyors in allocating the next soil observation. This study aimed: (i) to develop predictive statistical soil organic carbon models for Sulawesi, and (ii) to evaluate the best model between the three obtained models. Boalemo Regency in Gorontalo Province (Sulawesi) was selected as a studying area due to abundant legacy soil data. The study covered dataset preparation, model development, and model comparison. Dataset of soil organic carbon at 6 different depths as the target was established from 176 soil proﬁles and 7 terrain parameters were selected as predictors. Soil-landscape models for each soil depth were created using a regression tree, conditional inference tree, and multiple linear regression techniques. The result showed that model performance differed among 3 modeling techniques and soil depths. The tree models were better than the multiple linear regression model as they have the lowest RMSE index. The best model in the mountainous area seems to be the regression tree model, whereas in the plains it may be the conditional inference tree. In creating the provisional map, several models should be developed and the median of the predicted value is used as a provisional map. Keywords: Digital soil mapping, multiple linear regression, regression tree, soil-landscape model, soil organic carbon map

Studi Peran Subsektor Perikanan dalam Pengembangan Wilayah di Kota Sibolga: Study of Fisheries Subsector in Supporting Regional Development in Sibolga Muhammad Aspan Panggabean
Jurnal Ilmu Tanah dan Lingkungan Vol 18 No 1 (2016): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Subsektor perikanan diharapkan bisa menjadi sektor strategis bagi pengembangan wilayah Kota Sibolga di masa depan, karena sektor ini merupakan sumber daya fundamental dan termasuk sumberdaya terbarukan. Tujuan penelitian ini adalah untuk: (1) mengidentifikasi pengembangan subsektor perikanan di Sibolga, (2) menganalisis keterkaitan ke belakang dan ke depan (backward and forward linkages) dari ekonomi subsektor perikanan di Sibolga, (3) menggali persepsi pemangku kepentingan tentang pengembangan subsektor perikanan di Sibolga, dan (4) merumuskan arah prioritas pengembangan subsektor perikanan di Sibolga. Analisis data yang digunakan adalah analisis deskriptif, Hierarcy Analytical Process (AHP), dan Input-Output (I-O). Hasilnya menunjukkan bahwa subsektor perikanan menyumbang produk domestik regional bruto tertinggi hingga 22.86% dan memberikan kontribusi terhadap total output hingga 17.70%. Perikanan di Sibolga masih memiliki potensi untuk dieksplorasi mencapai 123.63 ribu ton di zona WPP-572, belum termasuk eksploitasi di luar zona ekonomi eksklusif. Keramba Jaring Apung (KJA) masih memiliki ruang seluas 1,276.97 ha untuk dimanfaatkan, terletak di Kecamatan Sibolga Utara dan Kota Sibolga. Subsektor perikanan secara total masih memiliki keterkaitan ke belakang dan ke depan (backward and forward linkages) yang kecil. Rendahnya hubungan subsektor perikanan memberikan dampak yang rendah terhadap peningkatan output sektor lain baik secara langsung maupun tidak langsung terhadap sektor lainnya. Persepsi pemangku kepentingan mengatakan bahwa sumber daya manusia dari kegiatan penangkapan ikan merupakan prioritas utama dalam pengembangan subsektor perikanan, namun dari analisis sumber daya manusia, perikanan budidaya harus menjadi prioritas pengembangan di subsektor perikanan di Sibolga. Kata kunci: Subsektor perikanan, keterkaitan, pembangunan daerah, Sibolga

HUBUNGAN KETERSEDIAAN AIR TANAH DAN SIFAT-SIFAT DASAR FISIKA TANAH Kukuh Murtilaksono; Enny Dwi Wahyuni
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 2 (2004): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

This research was conducted to study the relationship between soil moisture content and soil physical characteristics that affected the moisture.The soil samples were collected from 22 scattered sites of West Java and Central Java. Analysis of soil physical properties (texture, bulk density, particle density, total porosity and soil moisture retention) and soil chemical property (organic matter) was conducted at the laboratory of the Department of Soil Sciences, Faculty of Agriculture, Bogor Agricultural University. Analysis of simple linear regression was applied to know the correlation between soil moisture content and other basic soil physical properties.Availability of soil moisture (pF 4.20 – pF 2.54) significantly correlated with organic matter, total porosity, and micropores. The higher organic matter content, as well as total porosity and micro, pores the higher available soil moisture. Soil moisture of field capacity significantly correlated with clay content, sand content, micro and macropores. The higher clay content and micropores the higher soil moisture of field capacity. In the contrary, the higher macropores and sand content the lower the field capacity. Soil moisture of the wilting point significantly correlated with clay content and macropores. The higher clay content the higher the wilting point, while the higher macro pores the lower soil moisture of wilting point. Keywords: Available soil water, field capacity, organic matter, soil pores, wilting point

PENGOLAHAN DSM DENGAN INTERFEROMETRI SAR (InSAR) ANTARIKSA UNTUK MEKANISME PEMBANGUNAN BERSIH (MPB) PROTOKOL KYOTO M. A. Raimadoya; B. H. Trisasongko; D. Shiddiq; D. R. Panuju; R. Maulida
Jurnal Ilmu Tanah dan Lingkungan Vol 6 No 2 (2004): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Capacity development in biomass monitoring is a key action in the implementation of the Clean Development Mechanism of the Kyoto Protocol in developing countries like Indonesia. The objection of this research is to explore the processing of spaceborne InSAR for the construction of the Digital Surface Model (DSM). The research successfully completed the process by using two InSAR pairs: ERS-1 & ERS-2 tandem pass (completed) and ENVISAT repeat pass (coherence only). DSM product, after field validation, will be applied for SAR calibration in relation to biomass and carbon stock estimation. Keywords: CDM, DSM, Kyoto Protocol, spaceborne InSAR

Sampul JITL Vol. 19 No. 1 April 2017: Cover JITL Vol. 19 No. 1 April 2017 Admin JITL
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

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Dewan Editor: Editorial Team Admin JITL
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

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