Articles

Found 20 Documents
Search

IMPACT OF LAND-USE CHANGE ON SOIL CARBON DYNAMICS IN TROPICAL PEATLAND, WEST KALIMANTAN- INDONESIA Nusantara, Rossie Wiedya; Sudarmadji, Sudarmadji; Djohan, Tjut S.; Haryono, Eko
Indonesian Journal of Geography Vol 52, No 1 (2020): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.48451

Abstract

The conversion of tropical peat forest to other land uses can reduce organic carbon (C) and stable C isotope (?13C) of peat soil. This research aimed at analyzing the soil organic-C and ?13C of peatland with respect to maturity (fibric, hemic and sapric) in five types of peatland use, which included primary peat forest, secondary peat forest, shrubs, oil palm plantations, and cornfield in West Kalimantan. Analysis of peat soil samples includes organic C with Loss in ignition method and ?13C  using an isotope ratio mass spectrometry(IRMS) method. Organic-C at fibric was higher than hemic and sapric, respectively (57.2%, 57.0%, 56.4%), meanwhile, organic-C was the highest on primary peat forest, followed by on secondary peat forest, oil palm plantation, cornfield, and shrubs, respectively 57.1%, 57.0%, 56.4%, 56.0%. The cause of increasing and decreasing organic C and ?13C due to land-use change due to changes in vegetation, burning during tillage, and age of organic matter of peat soil. This condition causes the opening of natural peat ecosystems and changes in anaerobic to aerobic conditions. 
KEBISINGAN PADA KAPAL MOTOR TRADISIONAL ANGKUTAN ANTAR PULAU DI KABUPATEN PANGKAJENE Baharuddin, .; Haryono, Eko
JURNAL RISET TEKNOLOGI KELAUTAN Vol 10, No 2 (2012)
Publisher : Ikatan Sarjana Teknik Perkapalan UNHAS

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

Abstract

Kapal merupakan mode transportasi yang begitu penting bagi masyarakat Pulau Kulambing, Kab. Pangkajene. Namun umumnya kapal yang melayari rute ini berukuran kecil dan tidak menyediakan ruangan khusus untuk mesin sehingga diduga kebisingan yang ditimbulkan oleh mesin melebihi ketentuan yang ditetapkan dan jika dibiarkan lambat laun akan mengganggu kesehatan baik penumpang atau ABK. Tujuan penelitian ini untuk mengetahui tingkat kebisingan pada berbagai kondisi pelayaran serta titik pengambilan data. Metode pengambilan dilakukan secara langsung dengan menggunakan sound level meter. Sebagai tambahan akan diberikan asbes pada sepanjang pipa gas buang dengan harapan penambahan asbes tersebut dapat mengurangi kebisingan serta dampak yang ditimbulkan guna meningkatkan kesehatan dan kenyamanan pelayaran. Dan dari hasil penelitian ini tingkat kebisingan bunyi sebelum diberi peredam adalah berkisar 90 dB-110 dB. Pengurangan tingkat bunyi yang setelah diberi peredam berdasarkan hasil pengukuran antara 5,87 dB-10,45 dB. Sedangkan berdasarkan hasil perhitungan, pengurangannya berkisar 7,91 dB-8,01 dB
ALIRAN BAHAN ORGANIK PADA SAWAH PADI ORGANIK DI DUSUN JAYAN DESA KEBONAGUNG KEC. IMOGIRI KAB. BANTUL D.I. YOGYAKARTA Anshori, Arif; Sunarminto, Bambang Hendro; Haryono, Eko
Caraka Tani: Journal of Sustainable Agriculture Vol 31, No 1 (2016): March
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v31i1.11942

Abstract

Organic farming uses natural resources to improve the health and productivity of soil and plants. Nutrients are lost or transported through crops, erosion, leaching and volatilization must be replaced naturally and through the return of organic matter. This research aims to study the conditions of organic rice fields, specifically in terms of organic matter flow, in Jayan Kebonagung Imogiri Bantul. The organic rice field data obtained from interviews and archive farmers. The results indicate that the organic rice field in Jayan under a transition from conventional to organic rice field. Dose of organic fertilizer 10 tons/ha were given during the transition period. Organic fertilizer 5-10 tons/ha have been giving during the organic rice fields. Returns organic matter to agricultural land through land-crop-land, land-plant-livestock-land and land-crop-livestock-biogas-land. Manure, weeds and paddy field plants, crop waste, waste from agricultural products processing and non-agricultural organic wastes involved in the flow of organic matter. Farmers monitor the health and productivity of soil and plants as the basis in the management of organic rice field.
KARAKTERISTIK FISIK LAHAN AKIBAT ALIH FUNGSI LAHAN HUTAN RAWA GAMBUT Nusantara, Rossie Wiedya; Sudarmadji, Sudarmadji; Djohan, Tjut S.; Haryono, Eko
Perkebunan dan Lahan Tropika Vol 2, No 2 (2012): PERKEBUNAN DAN LAHAN TROPIKA
Publisher : Fakultas Pertanian Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/plt.v2i2.3732

Abstract

Tujuan penelitian ini adalah mengamati karakteristik serasah dan biomasa tanaman pada lima tipe lahan (hutan rawa gambut primer-HP, hutan gambut sekunder-HS, semak belukar-SB, kebun sawit-KS, kebun jagung-KJ), seperti berat basah, berat kering, kadar air, kadar abu, C-organik dan kandungan C, sebagai dampak perubahan penggunaan lahan. Penelitian ini dilakukan pada lahan gambut di Rasau Jaya-Propinsi Kalimantan Barat. Hasil penelitian ini menunjukkan bahwa berat basah, berat kering, kadar air, kadar abu dan C-organik biomasa pada KJ lebih tinggi daripada KS, SB, HS dan HP. Sedangkan serasah HP mempunyai kandungan C lebih tinggi daripada KS, HS, SB dan KJ. Kata kunci : biomasa tanaman, lahan gambut, perubahan penggunaan lahan, serasah
ENERGY MODELLING AND FORECASTING OF DAERAH ISTIMEWA YOGYAKARTA 2025 Haryono, Eko; -, Deendarlianto; Sopha, Bertha Maya
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master Program of Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.544 KB)

Abstract

Daerah Istimewa Yogyakarta (DIY) is one of the provinces in Indonesia which does not have a backup or potential sources of non-renewable primary energy. The non-renewable energy demand until this time, such as oil,coal and gas is supplied from the outside. DIY is in Java Madura Bali (JAMALI) interconnerction system and has not had a large-scale power systems. While DIY has renewable energy sources such as hydro, solar, wind, wave and biomass energy. These renewable energy sources are alternative energy that have not been optimally used. The lack of reserve energy resources that resulting dependence of energy supply from other areas should receive special attention from DIY government. To meet energy demand, the energy resources development is required. Due to the energy resources development requires a long time and high cost, it is necessary to be supported by good planning in energy policy.The purpose of this study is to determine the balance of energy demand and supply of  DIY until 2025. Furthermore, the purpose of this study is to find out a mix number of renewable energy. The Indonesian government has launched a vision of 25/25 which expection in 2025, the mix number of renewable energy will be 25%.The results of this study indicate that in 2025, the Transportion Sector is the largest energy user sector in DIY at 52.37%, followed by Household Sector (32.70%), Commercial Sector (8.26%), Other Sector (4.64%), and Industrial Sector (2.04%). The high level of energy consumption in the Transportation Sector is caused by the increasing number of vehicles especially motorcycles and passenger cars considering DIY is a student and tourism city. In term of the type of energy used, in 2025, the gasoline is the greatest type of energy demand (41.8%), followed by LPG (23.97%), electricity (18.14%) and diesel oil (11, 74%). This indicates that the fuel oil is still the main energy source for the DIY community activities. When viewed from supply side, most of the energy needs in DIY are supplied from outside. If the development of enewable energy targets DIY reached, the renewable energy mix is obtained by 0.53 %.
Kajian Tingkat Pelapukan Batuan Menurut Toposekuen Di Daerah Aliran Sungai Tangsi Kabupaten Magelang ., Jamulya; Haryono, Eko
Majalah Geografi Indonesia Vol 14, No 1 (2000)
Publisher : Majalah Geografi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.474 KB)

Abstract

Tujuan yang hendak dicapai dalam penelitian ini adalah a). mengetahui tingkat pelapukan batuan pada fiap bagian lereng pada toposekuen, dan b). mempelajari pengaruh toposekuen dalam mengontrol proses pelapukan di DAS Tangsi. Penelitian ini mengambil cuplikan batuan dan bahan lapukan (regolith) pada setiap bagian lereng mengikuli toposekuen. Cuplikan tersebut dianalisis di laboratorium yang meliputi; a). analisis granulometri, b). analisis volumetri, c). analisis mineral optik dan analisis difralcsi sinar X. Terdapat tujuh lokasi cuplikan yang dianalisis, yaitu puncak lereng atas; lereng- tengah, lereng bawah, dan dataran kaki- perbukitan dinudasional lereng Gunungapi Sumbing; serta lereng atas dan lereng bawah: perbukitan struktural Menoreh. Hasil penelitian menunjukkan bahrva batuan di daerah penelittan, baik di toposekuen perbukitan denudasional lereng Gunungapi Sumbing don lereng perbulatan struktural menoreh. didonsinasl deb breksi andesitig curah Julian rerata tahunan 3.416 mm, dan rerata temperature 22° C– 24,8° C. Tingkat pelapukan-batuan pada tiap bagian lereng pada toposekuen perbukitan denudasional gunungapi Sumbing;dan- perIndltan struktural Menoreh, tidak.menunjukkan kecenderungan berbedaan, bahkan cenderung sama. Tingkat pelapukan batuan belum lanjut, rlitandai dengan terbentuknya4entpung jenis haloisit atau kaolinit yang belum mengkristal sempurna. Berat volume bahan lapukan berkisar antara 0,795 hingga 1,287, tekstur lapukan gelith berdebu hingga geluh berlempung, persentase lempung 10,93% hingga 46,97%. Tingkat pelapukan batuan di flap bagian lereng di daerah penelitian tidak menunjukkan kecenderungan semakin lapuk.
EMISI CO2 TANAH AKIBAT ALIH FUNGSI LAHAN HUTAN RAWA GAMBUT DI KALIMANTAN BARAT Nusantara, Rossie Wiedya; Sudarmadji, Sudarmadji; Djohan, Tjut Sugandawaty; Haryono, Eko
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 21, No 3 (2014)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Penelitian ini bertujuan untuk menganalisis alih fungsi lahan gambut yang menyebabkan perubahan emisi CO2 tanah pada hutan rawa gambut primer (HP), hutan gambut sekunder (HS), semak belukar (SB), kebun sawit (KS), dan kebun jagung (KJ) dan menganalisis pengaruh suhu dan jeluk muka air tanah (water-table depth) terhadap emisi CO2 tanah. Sampel dari tiap tipe lahan diambil sebanyak lima ulangan, total sampel 25. Saat pengukuran respirasi CO2 tanah gambut dilakukan pengukuran suhu tanah dan muka air tanah. Pengukuran di lapangan dilaksanakan dua kali yaitu awal musim kemarau dan musim hujan. Hasil penelitian menunjukkan bahwa emisi CO2 tanah tertinggi dan terendah pada dua waktu pengukuran tersebut adalah pada tipe lahan KJ (6,512 ton ha-1 th-1) dan SB (1,698  ton ha-1 th-1) serta pada tipe lahan KS (6,701 ton ha-1 th-1) dan SB (3,169 ton ha-1 th-1) berturut-turut. Suhu tanah gambut tertinggi dan terendah pada dua waktu pengukuran tersebut berturut-turut adalah pada tipe lahan SB (27,78 oC) dan HP (22,78 oC), dan pada tipe lahan KS (29,08 oC) dan HP (26,56 oC) serta jeluk muka air tanah gambut berturut-turut pada tipe lahan KJ (56,2 cm) dan  SB (32,1 cm). Faktor-faktor yang menyebabkan perubahan emisi CO2 tanah gambut adalah suhu tanah, jeluk muka air tanah dan pengelolaan lahan yang menyebabkan perubahan sifat tanah gambut, seperti ketersediaan C-organik (jumlah dan kualitas bahan organik), pH tanah dan kematangan gambut.
CIE L*A*B* COLOR SPACE BASED VEGETATION INDICES DERIVED FROM UNMANNED AERIAL VEHICLE CAPTURED IMAGES FOR CHLOROPHYLL AND NITROGEN CONTENT ESTIMATION OF TEA (CAMELLIA SINENSIS L. KUNTZE) LEAVES Wahono, Wahono; Indradewa, Didik; Sunarminto, Bambang Hendro; Haryono, Eko; Prajitno, Djoko
Jurnal Ilmu Pertanian Vol 4, No 1 (2019): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4479.639 KB) | DOI: 10.22146/ipas.40693

Abstract

A lot of digital image techniques to assess crop agronomic character have been developed.  Most of those techniques are based on non-visible light equiped cameras, such as infared wavelengths. This research was aimed to examine the use of commercial digital camera with sensor range in visible light spectrum using CIE L*a*b* color space to estimate chlorophyll and nitrogen content of tea leaf.  Data was collected from an experiment of nitrogen dossage levels on 3 years after prunning tea crops.  The result shows that Lb* Difference Simple Index (LI), a*b* Difference Simple Index (AI), and  a* Vegetation Index (VIA) can be used to estimate tea leaf chlorophyll and nitrogen content.  The relationship between VIA and tea leaf nitrogen content was defined on linear equation y = 1.8382x2 - 0.3099x + 3.0658 with determinant coefficient R² = 0.71.
Potential Production of CH4 And N2O in Soil Profiles from Organic and Conventional Rice Fields Anshori, Arif; Sunarminto, Bambang Hendro; Haryono, Eko; Mujiyo, Mujiyo
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 1 (2018): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v15i1.19324

Abstract

The horizons in soil profile will determine the magnitude of greenhouse gas production due to the difference of total organic carbon and other chemical properties. This study aimed to determine the potential production of methane (CH4) and nitrous oxide (N2O) in each horizon of soil profile from organic and conventional rice fields. Soil samples which were taken from Imogiri Bantul D.I. Yogyakarta were used to determine soil properties, the potential of CH4, and N2O productions. The correlation analysis was used to determine the relationship between the production of CH4 and N2O with soil properties. The results showed that production of CH4 and N2O will be decreased with the increase of soil depth. Production of CH4 and N2O was higher in organic rice field than in conventional rice field. The total organic carbon (TOC) correlated positively with CH4-production (r=0.89, P<0.001, n=8) and N2O-production (r=0.87, P<0.001, n=8). The nitrogen content also correlated positively with CH4-production (r=0.87, P<0.001, n=8) and N2O-production (r=0.94, P<0.001, n=8). Mitigation of CH4 and N2O emissions should consider of C and N in the soil.
Kajian Tingkat Pelapukan Batuan Menurut Toposekuen Di Daerah Aliran Sungai Tangsi Kabupaten Magelang ., Jamulya; Haryono, Eko
Majalah Geografi Indonesia Vol 14, No 1 (2000)
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (376.474 KB) | DOI: 10.22146/mgi.6752

Abstract

Tujuan yang hendak dicapai dalam penelitian ini adalah a). mengetahui tingkat pelapukan batuan pada fiap bagian lereng pada toposekuen, dan b). mempelajari pengaruh toposekuen dalam mengontrol proses pelapukan di DAS Tangsi. Penelitian ini mengambil cuplikan batuan dan bahan lapukan (regolith) pada setiap bagian lereng mengikuli toposekuen. Cuplikan tersebut dianalisis di laboratorium yang meliputi; a). analisis granulometri, b). analisis volumetri, c). analisis mineral optik dan analisis difralcsi sinar X. Terdapat tujuh lokasi cuplikan yang dianalisis, yaitu puncak lereng atas; lereng- tengah, lereng bawah, dan dataran kaki- perbukitan dinudasional lereng Gunungapi Sumbing; serta lereng atas dan lereng bawah: perbukitan struktural Menoreh. Hasil penelitian menunjukkan bahrva batuan di daerah penelittan, baik di toposekuen perbukitan denudasional lereng Gunungapi Sumbing don lereng perbulatan struktural menoreh. didonsinasl deb breksi andesitig curah Julian rerata tahunan 3.416 mm, dan rerata temperature 22° C– 24,8° C. Tingkat pelapukan-batuan pada tiap bagian lereng pada toposekuen perbukitan denudasional gunungapi Sumbing;dan- perIndltan struktural Menoreh, tidak.menunjukkan kecenderungan berbedaan, bahkan cenderung sama. Tingkat pelapukan batuan belum lanjut, rlitandai dengan terbentuknya4entpung jenis haloisit atau kaolinit yang belum mengkristal sempurna. Berat volume bahan lapukan berkisar antara 0,795 hingga 1,287, tekstur lapukan gelith berdebu hingga geluh berlempung, persentase lempung 10,93% hingga 46,97%. Tingkat pelapukan batuan di flap bagian lereng di daerah penelitian tidak menunjukkan kecenderungan semakin lapuk.