Jurnal Ilmu Tanah dan Lingkungan
Not a member yet
301 research outputs found
Sort by
Flood Hazard Mapping Level Paddy Field at District Karawang: Pemetaan Bahaya Banjir Lahan Sawah di Kabupaten Karawang
Get PDFFlooding is one of the natural disasters that frequently hit several countries, including Indonesia. Data from the BNPB show of the year 1815 - 2013 ranks first flood disaster events most of the other disasters that as many as 5,394 events. Karawang District was ranked 3rd highest number of flood events in West Java. Nationally data from BNPB show Karawang ranks 8th flood-prone area. The purpose of this study to analyze the level of hazard of flooding the paddy field in Karawang. The method used in analyzing the level of hazard of flooding is done by overlaying and scoring from the paddy fields map, rainfall maps, soil drainage maps, and flood events maps. The results of this study indicate the paddy field in Karawang District which has a high flood hazard level contained in the Telukjambe West, East Telukjambe, and Jayakerta Sub Disctrict.
Keywords: Hazard, flood, mappingKabupaten Karawang merupakan salah satu daerah yang sering terkena banjir berdasarkan data dari BNPB dari tahun 1815 – 2013 jumlah kejadian banjir di Kabupaten Karawang berada pada urutan ke-3 terbanyak. Banjir di Kabupaten Karawang membawa kerugian yang besar bagi petani, maka dari itu pemetaan tingkat bahaya banjir sangat diperlukan. Kabupaten Karawang berada pada urutan ke-3 jumlah kejadian banjir terbanyak di Jawa Barat. Secara nasional data dari BNPB menunjukkan Kabupaten Karawang menempati urutan ke-8 wilayah rawan bencana banjir. Tujuan dari penelitian ini menganalisis tingkat bahaya banjir lahan sawah di Kabupaten Karawang. Metode yang digunakan dalam menganalisis tingkat bahaya banjir dilakukan dengan overlay dan skoring dari peta sawah, peta curah hujan, peta drainase tanah, dan peta kejadian banjir. Hasil dari penelitian ini menunjukkan lahan sawah di Kabupaten Karawang yang memiliki tingkat bahaya banjir tinggi terdapat di Kecamatan Telukjambe Barat, Telukjambe Timur, dan Jayakerta.
Kata kunci: Bahaya, banjir, pemetaa
Aplikasi Bakteri Endofit dan Mikoriza Terhadap Kandungan Unsur N, P dan K pada Pembibitan Tanaman Lada: Application of Endophytic Bacteria and Mycorrhizal toward N, P, and K Content of Pepper Seedling
Get PDFAplikasi formula bakteri endofit dan mikoriza diharapkan mampu memperbaiki kualitas pembibitan pada tanaman lada. Penelitian ini bertujuan mengetahui pengaruh formula bakteri endofit dan mikoriza terhadap serapan hara N, P, dan K pada tanah Podsolik Jasinga serta pertumbuhan lada pada fase pembibitan. Metode penelitian menggunakan rancangan acak kelompok (RAK) faktorial yang dikelompokkan berdasarkan ulangan. Formula bakteri endofit jenis (B2), (B3) dan tanpa bakteri (B0) sebagai faktor pertama. Mikoriza dengan tiga taraf yakni tanpa mikoriza (M0), 10 g tanaman-1 (M1) dan 20 g tanaman-1 (M2) sebagai faktor kedua. Perlakuan yang diuji sebanyak 9 kombinasi dan masing-masing perlakuan diulang sebanyak tiga kali, sehingga diperoleh 27 satuan percobaan. Setiap ulangan diwakili 5 tanaman, sehingga terdapat 135 tanaman. Secara umum formula bakteri endofit jenis B2 dan mikoriza 10 g tanaman-1 (M1) lebih baik dalam meningkatkan fase vegetatif tanaman lada.Application of endophytic bacterial formulas and mycorrhizal expected to improve the quality of seedling in pepper. This research aims to determine the effect of endophytic bacterial formulas and mycorrhizal to the absorption of N, P, and K in Podsolik Jasinga, and the growth of pepper in seedling phase. The research method used randomized block design grouped by replication. Endophytic bacteria formulas types (B2), (B3) and without endophytic bacterial formulas (B0) as the first factor. Mycorrhiza with three levels, without mycorrhizal (M0), 10 g plant-1 (M1) and 20 g plant-1 (M2) as the second factor. The treatments tested were nine combinations and each treatment was repeated three times. This experiment obtained 27 experimental units. Each replication represented by five plants, so there were 135 plants. In general, endophytic bacteria formula of and mycorrhizal 10 g plant-1 (M1) is better to increasing the vegetative phase of pepper plants
Mapping of Peatland Subsidence in Peat Hydrology Unit Jangkang River – Liong River in Bengkalis Island: Pemetaan Subsiden di Kesatuan Hidrologi Gambut Sungai Jangkang – Sungai Liong Pulau Bengkalis
Get PDFSubsidensi merupakan permasalahan penting pada pemanfaatan lahan gambut yang harus menjadi perhatian, apabila subsiden tidak terkontrol akan menyebabkan terjadinya banjir dan penurunan kualitas lahan. Penelitian ini mengembangkan pemetaan subsiden menggunakan faktor-faktor yang berpengaruh terhadap subsidensi dengan analisis regresi linear berganda metode stepwise. Dari hasil penelitian menunjukkan bahwa subsidensi yang terjadi disebabkan oleh 7 faktor yaitu umur tanaman, penggunaan lahan, bobot isi 50-100 cm, tingggi muka air tanah, tinggi muka air di saluran drainase, dan jarak dari saluran drainase dengan fungsi persamaan Y = -28.240 + 1.241 X1 + 0.023 X2 + 4.866 X3 + 0.370 X4 – 97.089 X5 – 0.209 X6 + 0.298 X7. Subsiden 0-50 cm terluas dengan luasan 13,472 ha pada penggunaan lahan aktual kebun karet seluas 4,013 ha, subsiden 50-100 cm mempunyai luasan 2,147 ha dengan penggunaan lahan aktual kebun karet seluas 813 ha, subsiden lebih dari 100 cm mempunyai luas terkecil yaitu 261 ha dengan penggunaan lahan aktual kebun kelapa 88 ha.
Kata kunci: Bengkalis, penggunaan lahan, pemetaan, lahan gambut, subsidenSubsidence is an important issue in the utilization of peatland. If the subsidence is not controlled, it will cause flooding and land degradation. This research develops subsidence mapping taken into account factors influencing the subsidence using regression analysis stepwise method. The result shows the influenced by age of plants, landuse, bulk density 50-100 cm, water table, water level in drainage canal and distance from the drainage canal with equation function Y = -28.240 + 1.241 X1 + 0.023 X2 + 4.866 X3 + 0.370 X4 – 97.089 X5 – 0.209 X6 + 0.298 X7. The range of 0-50 cm subsidence covers 13,472 ha occupied largely by rubber plantation of 4,013 ha, 50-100 cm subsidence covers 2,147 ha occupied largely by rubber plantation of 813 ha, and more than 100 cm subsidence covers 261 ha occupied largely by palm plantation of 88 ha.
Keywords: Bengkalis, landuse, mapping, peatland, subsidenc
KAJIAN RISIKO LINGKUNGAN UNTUK PENGGUNAAN AGEN HAYATI DI BIDANG PERTANIAN
Get PDFIn Indonesia, the biological agents have been widely used in the agriculture for reducing chemical fertilizers uses, for controlling plant pest and pathogens, and for increasing rate of composting process. The application of biological agents is especially important in the organic agriculture practices. The agents consist of microorganisms both fungi and bacteria, and in some extent are also viruses, that part of them are imported from other countries. Based on their characteristics, any biological agents that are released into the environment can pose potential problems to the environment or the ecology. There is a Ministerial Decree that require an environmental risk assessment (ERA) for getting a permission of an importation of biological agents. Unfortunately, there is not any guidance to conduct ERA of biological agents. This paper reviews ERA and using of the approach to do a risk assessment of biological agents that will be used in agriculture
ANALISIS KONVERSI LAHAN PERTANIAN DI KEBUPATEN TANGERANG
Get PDFLand conversion is a term that describes phenomenon of changing land-use from one to other uses permanently. Factors closely associated with land conversion were population growth, economic, and infrastructure development. This study aims are: (1) to determine rate and pattern of farmland conversion in Tangerang District, (2) to know growth rate of population density, economic growth, and development of Tangerang District, and (3) to determine factors affecting conversion of agricultural land in Tangerang District. Land conversion in Tangerang District caused areas of agricultural land decreased 2.4% per year. The agricultural lands were converted into built land. Population density grew unevenly in Tangerang District. The highest population density growth rate occurred ( during 1997-2007 ) in Pasar Kemis (19% ) and Kronjo faced the lowest rate (0.2%). The economic growth rate in the Tangerang District can be seen from the 1997-2007 Gross Regional Domestic Product (GRDP) Tangerang District. In general, service sector has the highest growth rate (3.9%) followed by industrial sector (0.9%) and agriculture sector (0.6%). Meanwhile, mining sector decreased by 4.1% per year. Level of development in Tangerang District analyzed with scalogram shows that in 2003 most of the villages (60.98%) were on 3rd hierarchy, while the rest on 2nd hierarchy (30.18%) and 1st hierarchy (8.84%). In the year 2006, there were an increase in number of villages on 2nd hierarchy and a decrease in number of villages on 3rd hierarchy, while the number of villages on 1st hierarchy were the same. Factors with highly significant (p-level <0.05) influencing agricultural land conversion were GRDP growth of services sector, GRDP of agricultural sector, GRDP of manufacturing industry, educational facilities, economic facilities, accessibility to health facilities, and accessibility to government centre, whereas accessibility to educational facilities was the significant factor (p-level <0.1)
RESPON VARIETAS PADI IR64 DAN IR64-SUB 1 TERHADAP PERENDAMAN DAN PEMUPUKAN N
Get PDFThere are many new rice varieties have been produced, introduced and breed at IRRI and the other National Agriculture Research Institutes that are tolerance to submergence condition to anticipate global warming and flash flooding around theworld. Among others are IR64-Sub 1, Suwarna-Sub 1, Inpara-1, Inpara-2, inpara-3 etc. However, those new varieties have not been tested widely yet, and the method of rice cultivation under submergence condition have not been adjusted, including the nutrient management.A greenhouse experiment was conducted at Muara Research Station, Bogor during 2008 dry season. The objectives of this experiment are (1) to study the effects of time of submergence and N application on plant growth and yield of R64 and IR64-Sub 1 rice varieties; (2) to find the best nutrient management for submergence rice varieties. The experiment was conducted during 2008 dry season at greenhouse, Muara Research station, Bogor. The design of the experiment was a Completely Randomized Factorial Design with three eplications. Factor 1 is rice variety (IR64 and IR64-Sub 1); Factor 2 is time of submergence (without submergence or control, submergence at vegetative phase (15 to 25 d.a.t), and at generative phase (35 to 45 d.a.t)). Factor 3 is N application, namely (F1) 300 kg Urea/ha 3x applications at 7 d.a.t- 30 d.a.t – 55 d.a.t; (F2) Mudball urea –300 kg Urea/ha applied once at 7 d.a.t. (F3) compost; and (F4) compost and urea; (F5) Urea and silikat.urea-N application at four time 0 d.a.t – 7 d.a.t – 30 d.a.t – 55 d.a.t (factor C). The results of experiments showed that submergence changes rice plant growth pattern (mainly tiller number and plant height), increased dry grain weight of IR64, namely 35.9 g at early vegetatif phase and 29.9 g at late vegetatif phase, while for IR64-Sub 1 32.6 g and 30.3 g at the same respective phase. Mudball urea and silicate application improved plant resistant to submergence and increase rice yield
OPTIMASI PERENCANAAN PENGGUNAAN LAHAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFI (SIG) DAN SOIL AND WATER ASSESSMENT TOOL (SWAT) (SUATU STUDI DI DAS CIJALUPANG, BANDUNG, JAWA BARAT)
Get PDFThe use and management of land resource which are unsuitable with its land capability will cause physical, chemical and biological-damage to the land and will disturb its hydro-orological function. The damage of land resources in a watershed needs improvement to increase its land quality. Optimal land use management planning based on its land suitability and hydrological aspects become important and need to be applied. The objectives of the study were: 1) To analyze land use change at Cijalupang Watershed, 2) To evaluate SWAT capability to predict impact of land use change on the hydrologic characteritics of the watershed, and 3) To provide land use plan based on land quality and hydrologic characteritics of the watershed. The result showed that optimizing land use management by integrating GIS and SWAT model at the Cijalupang Watershed was capable to increase land quality of the watershed. This was shown by the improvement of its land use capability to create better hydrological condition by decreasing run off 2.1 % and increasing base flow and lateral flow 0.4% and 0.4% respectively
CHANGES IN SOIL PHYSICAL CHARACTERISTICS ON THE SOIL CRUST PROCESS THROUGH THE USE OF CHICKEN MANURE AND POLYACRYLE AMIDE UNDER INTENSE RAINFALL
Get PDFSoil crust is a soil suface layer which is more compact, harder, and brittle when it is drier than underlaying material. The soil physical characteristics such as aggregate stability, bulk density and soil permeability rate are closely related to this soil crust process. An experiment was conducted to evaluate the effects of chicken manure doses and certain chicken manure with PAM (Polyacrile Amide) to soil aggregate, bulk density and soil permeability rate. The result of this research, were: 1) An incremental addition of chicken manure into soil increased soil aggregation percentage, soil stability and soil permeability rate, and 2) The combined incremental additions of chicken manure with PAM were found to be more effective than only an incremental additions of chicken manure, increasing the aggregation percentage, soil aggregate stability, from the soil one day drainage process, but another case in decreasing the bulk density permeability rate from the soil with the same process
