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PRIORITAS PENGEMBANGAN KAWASAN PERKEBUNAN TEBU DI KABUPATEN SERAM BAGIAN TIMUR Osly, Prima Jiwa; Widiatmaka, Widiatmaka; Pramudya, Bambang; Murtilaksono, Kukuh
MAJALAH ILMIAH GLOBE Vol 17, No 1 (2015)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (787.311 KB) | DOI: 10.24895/MIG.2015.17-1.216

Abstract

Lahan merupakan salah satu faktor produksi yang sangat penting dalam pengusahaan perkebunan, karena lahan merupakan media tumbuh bagi tanaman. Pemanfaatan sumber daya lahan perlu disesuaikan dengan kondisi agroekologinya, agar usaha pertanian dapat berkelanjutan. Usahatani tebu merupakan praktek penggunaan lahan komersial monokultural yang sering menyebabkan penurunan keanekaragaman hayati pertanian (agrobiodiversity). Penelitian ini difokuskan pada pemilihan lahan yang tepat dan diprioritaskan untuk penanaman tebu. Integrasi pendekatan Multi Criteria Decision Making (MCDM) dan Sistem Informasi Geografis (SIG) menyediakan sistem pendukung keputusan spasial yang kuat dan efisien untuk menghasilkan peta kesesuaian lahan dan prioritas pengembangan kawasan serta untuk menganalisis data spasial dan membangun proses untuk pendukung keputusan. Tujuan penelitian ini adalah melakukan analisis prioritas pengembangan kawasan perkebunan tebu dan melakukan analisis ketersediaan lahan untuk kawasan perkebunan Tebu. Penelitian ini menggunakan metode Multi Criteria Decision Making (MCDM) berbasis Analytical Hierarchy Process (AHP) dengan bantuan Sistem Informasi Geografis (SIG). Berdasarkan hasil analisa total areal yang berpotensi dimanfaatkan untuk kawasan perkebunan tebu tersebut adalah sebesar 121.484,83 ha atau 21,48% dari total daratan Kabupaten Seram Bagian Timur. Total areal tersebut terbagi pada kelas Prioritas I sebesar 76.751,79 ha (63,18%), kelas Prioritas II sebesar 41.807,84 ha (34,41%) dan kelas Prioritas III sebesar 2.925,21 ha (2,41%).Kata kunci: Tebu, MCDM, AHP, SIG, PrioritasABSTRACTLand is one of the most important production factors in plantation industry, because the land is a growing medium for plants. Utilization of land resources needs to be adapted to its agro-ecology conditions, in order to be sustainable. Sugarcane farming is a monoculture commercial land use practices that often lead to a decrease in agricultural biodiversity. This study focused on the selection of appropriate land and prioritized for planting sugarcane. Integration of Multi Criteria Decision Making (MCDM) and Geographic Information System (GIS) provides a powerful and efficient spatial decision support system to produce land suitability maps and regional development priorities as well as to analyze spatial data and build process for decision support system. The purpose of this study is to analyze the regional development priorities of sugarcane plantations and analyze the availability of land for sugarcane plantation area. This study uses the Multi Criteria Decision Making (MCDM) based Analytical Hierarchy Process (AHP) with the help of Geographic Information System (GIS). Based on analysis of the total area that could potentially be used for sugarcane plantation area amounted to 121,484.83 ha (21.48%) of the total land area in Seram Bagian Timur Regency. The total area was divided to the class Priority I of 76,751.79 ha (63.18%), class Priority II at 41,807.84 ha (34.41%) and class Priority III of 2,925.21 ha (2.41%).Keywords: Sugarcane, MCDM, AHP, GIS, Priority
PERENCANAAN SPASIAL PENINGKATAN PRODUKSI KEDELAI BERBASIS KESESUAIAN LAHAN DI KABUPATEN LOMBOK TIMUR PROVINSI NUSA TENGGARA BARAT Widiatmaka, Widiatmaka; Ambarwulan, Wiwin; Munajati, Sri Lestari; Munibah, Khursatul; Murtilaksono, Kukuh; Tambunan, Rudi P; Nugroho, Yusanto A; Santoso, Paulus B.K.; Suprajaka, Suprajaka; Nurwadjedi, Nurwadjedi
MAJALAH ILMIAH GLOBE Vol 15, No 2 (2013)
Publisher : Badan Informasi Geospasial

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.475 KB) | DOI: 10.24895/MIG.2013.15-2.86

Abstract

Pemanfaatan data survei tanah dan evaluasi lahan dilakukan untuk perencanaan peningkatan produksi kedelai menjawab tantangan kelangkaan pasokan kedelai di Kab. Lombok Timur, Provinsi Nusa Tenggara Barat. Data yang digunakan adalah hasil survei oleh Pusat Pemetaan dan Integrasi Tematik, Badan Informasi Geospasial dilengkapi dengan analisis citra dan evaluasi lahan fisik dan ekonomi untuk kedelai. Analisis kesesuaian lahan fisik dan ekonomi untuk kedelai dilakukan menggunakan Automated Land Evaluation System (ALES). Penggunaan lahan diinterpretasi menggunakan citra SPOT-5, dipertajam dengan data lebih detil menggunakan citra IKONOS dari Kementerian Pertanian. Hasil-hasil analisis diinterpretasi dalam term potensi intensifikasi kedelai pada lahan sawah eksisting dan potensi perluasan tanaman kedelai pada lahan kering yang potensial. Hasil analisis menunjukkan bahwa di wilayah Kabupaten Lombok Timur masih dimungkinkan dilakukan intensifikasi dan ekstensifikasi untuk peningkatan produksi kedelai dalam rangka peningkatan ketahanan pangan regional. Persoalannya, keuntungan petani dalam budidaya kedelai pada berbagai kelas kesesuaian lahan jauh lebih kecil dibandingkan pengusahaan padi sawah. Perencanaan fisik berbasis kesesuaian lahan perlu diikuti dengan upaya menciptakan kondisi agar penanaman kedelai menarik bagi petani dari sisi ekonomi.Kata Kunci: Ketahanan Pangan, SPOT-5, Kesesuaian Lahan, Sistem Evaluasi Lahan Otomatis.ABSTRACTData from soil survey and land evaluation were used in planning for increasing  soybean production, answering the lack of soybean supply in East Lombok Regency, West Nusa Tenggara Province. The results of the survey of Center for Integrated Mapping, Geospatial Information Agency were used, combined with image analysis and physical and economical land suitability analysis for soybeans. Analysis of physical and economical land suitability for soybean was performed using Automated Land Evaluation System (ALES). Land use was interpreted using SPOT-5 imagery, completed by the data of IKONOS imagery from Ministry of Agriculture. The results of the analysis were interpreted in terms of the potential intensification of soybean on existing ricefield and the potential expansion of soybean crops ondry land. The analysis showed that in East Lombok Regency, there is still possible to do the intensification and extension of soybean in order to improve regional food security. The problem is, benefit of farmers in the cultivation of soybeans in various land suitability classes are much smaller than rice cultivation. Physical planning based on land suitability needs to be coupled with efforts to create an attractive situation to farmers for planting soybean.Keywords: Food Security, SPOT-5, Land Suitability, Automated Land Evaluation System.
Analisis Dampak Perubahan Penggunaan Lahan Terhadap Hasil Air DAS Cicatih Yusdinar, Haki; Tarigan, Suria Darma; Murtilaksono, Kukuh
JTERA (Jurnal Teknologi Rekayasa) Vol 3, No 2: December 2018
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2076.913 KB) | DOI: 10.31544/jtera.v3.i2.2018.231-248

Abstract

Penelitian ini bertujuan untuk menganalisis perubahan penggunaan lahan dan hasil air beserta karakteristik hidrologi pada DAS Cicatih yang terjadi tahun 2006-2016. Penggunaan model hidrologi HEC-HMS digunakan untuk simulasi hasil air dan debit puncak terhadap penggunaan lahan berdasarkan pada skenario yang telah disusun. Pengaruh skenario perubahan penggunaan lahan ini dianalisis untuk melihat penggunaan lahan terbaik terhadap hasil air, debit puncak, serta KAT-KRA DAS Cicatih. Penggunaan lahan tahun 2006 diperoleh berdasarkan peta citra Landsat 5 ETM+ melalui metode supervised (maximum likelihood) dengan tingkat akurasi kappa sangat baik. Peta penggunan lahan tahun 2016 diperoleh dengan citra lansat 8 OLI TIRS dengan peta rujukan RBI dan Google Earth Pro serta groundcheck pada lokasi-lokasi tertentu. Penggunaan model HEC-HMS untuk hasil air dan debit puncak diperoleh pada tingkat akurasi Z > 20% dengan RMSE sebesar 13,4 m3/dt serta nilai NSE 0,649 sebagai kalibrasi model pada penggunaan lahan tahun 2006. Konsistensi model diujikan terhadap penggunaan lahan tahun 2016 dengan nilai Z > 20%, RMSE 14,1 m3/dt, serta NSE 0,579. Berdasarkan skenario yang disusun diperoleh penurunan hasil air pada penggunaan lahan skenario penerapan Rencana Tata Ruang dan Wilayah Kabupaten Sukabumi periode 2032 yaitu sebesar 9,03%, debit puncak 22,61% serta KRA dan KAT berturut-turut berkategori sangat rendah dan rendah.
Water Balance in Oil Palm Plantation with Ridge Terrace and Nephrolepis biserrata as Cover Crop Ariyanti, Mira; Yahya, Sudirman; Murtilaksono, Kukuh; Suwarto, Suwarto; Siregar, Hasril H.
Journal of Tropical Crop Science Vol 3 No 2 (2016): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1114.492 KB) | DOI: 10.29244/jtcs.3.2.35-55

Abstract

The existence of oil palm plantations as a possible cause of drought in the surrounding areas in Indonesia is a critical issue. Therefore, information related to the effects of oil palm plantations on the surrounding environment in terms of soil water content (SWC) availability is needed. Soil and water conservation techniques in the form  of ridge terracing and cover crops,  such as Nephrolepis biserrata,  can be  expected to potentially improve soil water  reserves, especially in the dry-season, by accumulating water  in the rainy season.  This study aimed to study the effects of N. biserrata as cover crop, together with the potential effects of ridge terraces, on the water balance in mature oil palm plantations.  The research was conducted in mature oil palm plantations, Afdeling III block 375 (planted in 1996) and block 415 (planted in 2005), Rejosari Unit, PT Perkebunan Nusantara (PTPN) VII in Natar District, South Lampung Regency, Indonesia, from August 2014 to January 2015. The research was based on of setting up 15 m x 20 m experimental plots with the following treatments:  (i) without ridge terraces and without N. biserrata (G0T0); (ii) without ridge terraces but with N. biserrata (G0T1); (iii) with ridge terraces but without N. biserrata (G1T0); (iv) with ridge terraces and with N. biserrata (G1T1).   Hydrology parameter data were collected for each treatment plot; water balance was calculated using a water balance equation. The results showed that the use of the cover crop N. biserrata in combination with ridge terraces helped improving SWC reserves by approximately 71% and 12%, respectively.  The use of N. biserrata as a cover crop reduced the rate of water loss by percolation and run-off, by approximately 36% and 80%, respectively, in an area where the annual rainfall is above 2,400 mm per year.  The presence of N. biserrata shortened the period of SWC deficit by extending the period of a water surplus by 70 days when compared with ridge terracing alone (which reduced the period of SWC by 50 days).
The Roles of Asystasia gangetica (L.) T. Anderson and Ridge Terrace in Reducing Soil Erosion and Nutrient Losses in Oil Palm Plantation in South Lampung, Indonesia Asbur, Yenni; Yahya, Sudirman; Murtilaksono, Kukuh; Sudradjat, Sudradjat; Sutarta, Edy Sigit Sutarta Sigit
Journal of Tropical Crop Science Vol 3 No 2 (2016): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.122 KB) | DOI: 10.29244/jtcs.3.2.49-55

Abstract

Asystasia gangetica (L.) T. Anderson is a weed commonly found on oil palm plantations and can be used as cover crop for mature oil palm plantations due to its tolerance to shading. The use of cover crop is  a soil conservation technique to support sustainable availability of soil nutrients by reducing erosion and nutrients loss, particularly during the rainy seasons. This research aims to determine the roles of A. gangetica as cover crop for measures against erosion and nutrients loss in mature oil palm plantation. This research was conducted in oil palm plantation, Unit Rejosari, PT Perkebunan Nusantara (PTPN) VII, District of Natar, South Lampung Regency from August 2014 to April 2015. The research used split block design in randomized complete block design with two factors and six replications. The main plots were ridge terrace, namely with and without ridge terrace. The sub plots were cover crops, namely with and without cover crops A. gangetica. The results show that using A. gangetica as cover crops in mature oil palm plantations effectively minimized erosion and loss of organic C, N, P, and K by 95.7%, 93.4%, 96.0%, and 90.0 %, respectively. The use of cover crop became more effective when combined with ridge terrace and reduced erosion by 94.1% and loss of organic C, N, P and K by 99.1%, 99.2%, 90.0% and 98.5%, respectively.
FRACTIONATION OF IRON (Fe) AND MANGANESE (Mn) IN THE HORIZONS OF A FOREST SOILS, AGROFORESTRY, AND DRYLAND AGRICULTURE Parjono, Parjono; Anwar, Syaiful; Murtilaksono, Kukuh; Indriyati, Lilik
Journal of Environmental Science and Sustainable Development
Publisher : UI Scholars Hub

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

Abstract

One of the main problems with acidic soils is the availability of soil nutrients. In such soils, iron (Fe) and manganese (Mn) ions are highly present. This study evaluated the Fe and Mn fractions in the soil profiles of forests used for agroforestry and dryland agriculture in the upper Ciliwung watershed. The watershed is a zone of high rainfall washing. The evaluation was based on the results of analysis of soil samples taken at four soil horizons (Ao or Ap, A1 or A2, B1, and B2) for each type of land use. Research was conducted by survey and laboratory analysis. Fractionation of Fe and Mn employed sequential extraction methods with different compounds in each fraction. Fractionation was divided into exchangeable fractions (Exch), acid extractable (Acex), can be reduced (Red), oxidized (Oxs), and residual (Res). Results showed that Res Fe was (>23000.8 ppm or 76.3%) and Oxs Mn (>1642.9 ppm or 52.9%) dominated each type of land use, while the lowest fractions were Exch Fe (<12.2 ppm or 0.022%) and Exch Mn fraction (<97.2 ppm or 1.50%) in each type of land use.
Land Use Planning of Way Betung Watershed for Sustainable Water Resources Development of Bandar Lampung City Yuwono, Slamet Budi; Sinukaban, Naik; Murtilaksono, Kukuh; Sanim, Bunasor
JOURNAL OF TROPICAL SOILS Vol 16, No 1: January 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i1.77-84

Abstract

Way Betung watershed is one of the important water resources in Lampung Province and it provides a clean water for Bandar Lampung City through a regional water supply company (PDAM). By the increase of population and economical activities of Bandar Lampung City, the need of clean water also increase, however by the time, the conditions of Way Betung watershed as water resources are declining. Therefore, to improve or to restore WayBetung watershed, a high cost is needed. The research was aimed: (a) to study the effects of Way Betung watershed land use change on the water resources of Bandar Lampung City, (b) to arrange the sustainable development of Way Betung watershed in order to maintain the availability of water resources. The sustainable developments of water resources of Way Betung watershed were arranged in five alternatives/scenarios and each alternative was related toits erosion (USLE method) and its run off volume (SCS method). The results showed that land use changes of Way Betung watershed (1991-2006) were likely to increase daily maximum discharge (Q max), to decrease daily minimum discharge (Q min), to increase fluctuation of river discharge, and to increase yearly run off coeffcient. The best sustainable development of water resources of Way Betung watershed, Lampung Province, was alternative/scenario-4 (forest as 30% of watershed areas + alley cropping in the mix garden). This alternative will decrease erosion to the level lower than tolerable soil loss and also decrease fluctuation of monthly run off.Keywords: Land use change, run off coefficient, water resources, watershed
Reformulation of Crop and Management Factor in ANSWERS model Hidayat, Yayat; Sinukaban, Naik; Pawitan, Hidayat; Murtilaksono, Kukuh
JOURNAL OF TROPICAL SOILS Vol 13, No 2: May 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i2.155-160

Abstract

Crop and management factor value is significantly corelated with outputs of ANSWERS model especially on soil erosion.   Using daily crop and management factors (daily C factors), the ANSWERS model performs well in predicting soil erosion which is showed by determination coeffient (R2 = 0.89), model efficiency (0.86), and average of percentage model deviations (24.1 %).  Whereas using USLE C factor (2 cropping systems), predicted is much higher than measured soil erosion (over estimate).  Output of the model is not statisfy, it is represented by model coefficient (0.40) and average of percentage model deviations (63.6 %).