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Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment)
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
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Search results for , issue "Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan" : 6 Documents clear
Identifikasi Dinamika Spasial Penggunaan dan Tutupan Lahan di Kabupaten Indramayu: Identification of Spatial Dynamics of Land Use and Cover in Indramayu Regency Muhammad Firmawan; Widiatmaka; Kukuh Nirmala
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The increase in population occurs in Indonesia every year. This results in a high demand for space. Indramayu Regency is one of the regencies with high dynamics of land use and cover, which is indicated by an increase in residential area of 14.8 ha year-1 and a decrease in rice fields by an average of 13.9 ha year-1. This study aimed to identify the types of land use and cover in order to become a reference for analyzing the spatial dynamics of land use and cover in Indramayu Regency. Spatial dynamics of land use and cover were identified through Landsat 7 and Sentinel-2A which were then analyzed for overall accuracy, Kappa accuracy, validation using Google Earth, and overlays to produce maps of land use and cover dynamics in 2005, 2011 and 2021. The results showed that there are 8 classes of land use and cover in Indramayu Regency, namely forest, open land, dry land agriculture, dry land agriculture, mixed dry land, rice fields, settlements, ponds, water bodies. Paddy fields have a dominant area along the observation point (>61%) which are spread the central part of Indramayu Regency. The percentage of residential area increased by 0.8% from 33,724 ha (16.2%) to 35,377 ha (17.0%) in the period 2005-2021. Meanwhile, the percentage of pond area increased by 0.5% from 23,221 ha (11.1%) to 24,163 ha (11.6%) during that period. The increase in population and economic level are some of the factors causing the dynamics of land change in Indramayu Regency.
Ketahanan Tanaman Bunga Matahari (Helianthus annuus L.) terhadap Cekaman Air dengan Aplikasi Hidrogel dan Waktu Penyiraman pada Regosol: Resistance of Sunflower (Helianthus annuus L.) on Water Stress by Application of Hydrogel and Watering Time in Regosol Lilik Tri Indriyati; Wahyu Purwakusuma; Septi Ichwani
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.23.2.72-77

Abstract

Application of hydrogel as soil conditioner can increase water and/or nutrient of coursed textured soil, with a possible reduction of irrigation frequency, and in turn increase plant growth. This research was aimed to investigate application of type of hydrogel and time of watering interval on the growth of sunflower plant, soil water availability, and plant resistance to water stress, and to verify the effect of combination of hydrogel type and watering time interval on sunflower growth on Regosol from Dramaga, Bogor. The experiment was arranged in completely randomized factorial design with two factors, that were hydrogel type which was consisted of no hydrogel application as control (H0), hydrogel of Terracottemâ (H1), and hydrogel of synthetic super absorbent (H2); and watering time interval which was consisted of once in 5 days of watering (P1), once in 10 days of watering (P2), and once in 15 days of watering (P3). Hydrogels application was conducted shortly before two weeks old seeds of IPB BM1 genotype sunflower were transplanted in pot containing Regosol which was equivalent to 10 kg of oven- dry weight. Variables observed were soil moisture (soil water content), soil water retention in some soil-water matric suction (pF), leaf area, stem diameter, and root length. Results of experiment showed that hydrogel application significantly increased the water availability for plants in dried soil condition as a result of long time interval of watering, stem diameter of plant, and root length of sunflower compared with no hydrogel application (control). Soil moisture, stem diameter, and root length of treatment with hydrogel of H1 were not significantly different with that of H2. Time interval of watering significantly affected leaf area, stem diameter, and soil moisture. The leaf area, stem diameter of plant, and soil moisture in once watering in 15 days (P3) were significantly lower than P1. Combination between hydrogel of Terracotem (H1) and time interval of once a five days of watering (P1) was the best treatment combination in improving the growth of sunflower plant in Regosol from Dramaga, Bogor.
Hubungan Curah Hujan Terhadap Limpasan Permukaan dan Sedimen pada Berbagai Penggunaan Lahan di DAS Arui, Kabupaten Manokwari: The relationship of Rainfall on Surface Runoff and Sediments on Various Land Use in Arui Watershed Manokwari Regency Mahmud; Wahyudi; Surianto Bataradewa; Heru Joko Budirianto; Mutakim; La Ode Muhlis
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.23.2.85-92

Abstract

Limpasan permukaan dan sedimen seringkali diremehkan dalam upaya mitigasi banjir. Padahal keduanya jika dalam jumlah besar akan menyebabkan pedangkalan dan meluapnya air sungai yang berdampak banjir. Penelitian ini bertujuan untuk menentukan pengaruh limpasan permukaan dan sedimen terhadap curah hujan dengan analisis regresi sederhana SPSS 17. Hasil penelitian menunjukan hubungan antara curah hujan dengan aliran permukaan hanya penggunaan lahan sebagai tegalan yang signifikan, sementara penggunaan lain tidak signifikan, dilanjutkan uji linieritas menujukan garis linier. Hasil uji signifikansi korelasi/keeratan tidak menunjukan korelasi (sangat lemah) hanya pada penggunaan lahan sebagai tegalan yang menunjukan korelasi yang cukup erat. Sementara hubungan antara curah hujan dengan sedimen menunjukan hubungan yang tidak signifikan, dilanjutkan uji signifikansi korelasi tidak menunjukan korelasi (sangat lemah). Pada lima penggunaan lahan hubungan keeratan curah hujan dengan limpasan permukaan menunjukan semua tidak ada hubungan /hubungan sangat lemah. Dengan demikian semakin meningkatnya curah hujan tidak selalu meningkatkan sedimen. Hanya penggunaan lahan sebagai perkebunan kelapa sawit yang mengalami penambahan luas. Penurunan luas hutan diduga peningkatan perambahan liar pada hutan produksi terbatas yang berada disekitar perkebunan kelapa sawit.
Aplikasi Pupuk Hayati Mikoriza terhadap Tanaman Bawang Merah (Allium cepa var. aggregatum) pada Latosol Dramaga: Application of Mycorrhizal Biofertilizer on Shallot (Allium cepa var. aggregatum) Plant on Latosol Dramaga Fahrizal Hazra; Fatimah Nur Istiqomah; Lusiana Adriani
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.23.2.61-67

Abstract

Mycorrhizal bio-fertilizers can maintain land productivity and are environmentally friendly. This study aims to analyze the effect of mycorrhizal biofertilizer on the growth of shallots (Allium cepa var. Aggregatum) and to determine root infection and its effect on soil N, P, K levels. The experimental design used was a completely randomized design (CRD). The treatment of biological fertilizer testing is carried out based on the Regulation of the Minister of Agriculture No. 70 / Permentan / SR. 140/10/2011, consisting of 6 treatments (AF) as follows: A) control, B) standard fertilizers, C) mycorrhizal biological fertilizers, D) mycorrhizal biological fertilizers + 25% standard fertilizers, E) mycorrhizal biological fertilizers + 50% standard fertilizer, F) mycorrhizal biological fertilizer + 75% standard fertilizer. There were 5 replications so that 30 experimental units were obtained. Mycorrhizal bio-fertilizers can reduce the need for standard fertilizers (PS) to 25% to 50%. The combination of biological fertilizer of 2.5 g / plant with 50% PS produces the best plant height and biomass weight, but economically it is recommended to use 25% PS. The treatment applied to mycorrhizae had a very high root infection value, which was above 75%. The types of spores that were successfully associated were Acaulospora sp., Glomus etunicatum, and Glomus sp. The application of mycorrhizae resulted in an increased response of 14.91% for P-available Latosol, while for K-dd and N-total there was no significant effect.
Impact of Land Use and Climate Changes on Flood Inundation Areas in the Lower Cimanuk Watershed, West Java Province Muhammad Ardiansyah; Rifqi Aditya Nugraha; La Ode Syamsul Iman; Syamsu Dwi Djatmiko
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.23.2.53-60

Abstract

Land use and climatic changes potentially affect the surface runoff and inundation in watershed zones. Every year, the outflow of the Cimanuk River causes floods across the majority of the upper area of the Cimanuk Watershed, as well as the lower area. This study aimed to assess the impact of climatic and land use changes on future flood inundation in the Lower Cimanuk Watershed using a RRI model. Land-use change has been prepared by modeling using a multi-layer perceptron neural network and Markov Chain approach, while climate change using HadGEM2-ES global climate model data under scenarios RCP4.5. In particular, the forest area was projected to decline in this watershed zone, from 19.54% of the total area in 2019 to 17.73% in 2050. Similarly, the area of paddy fields was predicted to decline from approximately 34.36% in 2019 to 29.65% in 2050. In contrast, other types of land use such as dryland agriculture, mixed dryland agriculture, and settlements were projected to increase in the future. The coverage of the simulated flood inundation area using the Rainfall-Runoff Inundation model estimated to reach 179.4 km2 in 2019. The simulation results showed an increase in flood inundation areas in 2030 and 2050, alongside changes in land use and climate. The areas affected by flood inundation were estimated to reach 253.3 km2in 2030. This coverage was expected to increase by 311.9 km2 in 2050, with severely affected land uses including settlements, dry land agriculture, mixed dry land agriculture, paddy fields, and ponds.
Dinamika Pelepasan Nitrogen Empat Jenis Pupuk Urea Pada Kondisi Tanah Tergenang: Dynamics of Nitrogen Release by Four Types of Urea in Flooded Conditions Arief Hartono; Budi Nugroho; Desi Nadalia; Afifah Ramadhani
Jurnal Ilmu Tanah dan Lingkungan Vol 23 No 2 (2021): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitl.23.2.66-71

Abstract

Pupuk urea merupakan sumber hara nitrogen (N) yang paling banyak digunakan di Indonesia, termasuk pada lahan sawah. Urea merupakan pupuk N yang larut air sehingga penggunaan urea di sawah perlu dikaji dalam hubungannya dengan pelepasan pupuk. Di dalam penelitian ini digunakan urea dengan formulasi berbeda yaitu pupuk urea Kujang dan Pupuk Sriwijaya (Pusri) yang merupakan urea konvensional dan urea prill dan granul yang merupakan urea modifikasi yang mengandung formaldehida masing-masing 0.10 dan 0.50%. Tujuan penelitian ini adalah untuk mengevaluasi pelepasan N dari tipe urea konvensional dan urea yang diberi formaldehida pada kondisi tanah tergenang. Metode penelitian yang digunakan adalah inkubasi dan pencucian. Inkubasi dilakukan selama 7, 14, 28, 45, 60, dan 90 hari serta dilakukan pencucian pada setiap akhir masa inkubasi. Hasil pencucian ditetapkan kandungan amonium dan nitrat. Hasil penelitian menunjukkan bahwa pelepasan N dalam bentuk amonium dan nitrat antar perlakuan pupuk urea tidak berbeda nyata. Hasil total N tercuci menunjukkan nilai paling tinggi diperoleh oleh urea granul sebesar 78.0 mg tabung-1, kemudian disusul oleh urea prill 75.2 mg tabung-1, urea kujang sebesar 71.5 mg tabung-1, dan urea pusri sebesar 68.4 mg tabung-1. Berdasarkan hasil persamaan first order kinetic, diperoleh nilai pelepasan maksimum dan konstanta kecepatan. Nilai pelepasan maksimum tertinggi dimiliki oleh urea granul sebesar 94.6 mg tabung-1, kemudian urea prill sebesar 88.3 mg tabung-1, urea Pusri sebesar 82.3 mg tabung-1, dan urea Kujang sebesar 79.2 mg tabung-1. Sementara untuk nilai konstanta kecepatan, konstanta kecepatan tertinggi diperoleh pada urea kujang sebesar 0.0349 hari-1, kemudian dilanjutkan oleh urea prill dan pusri sebesar 0.0256 hari-1, dan urea granul sebesar 0.0253 hari-1. Hasil penelitian menunjukkan bahwa urea yang diperlakukan dengan formaldehida terutama dalam bentuk granul cenderung memiliki kemampuan untuk memperlambat proses pelepasan N yang ditunjukkan dengan nilai konstanta kecepatan pelepasan N yang paling rendah.

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