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All Journal Jurnal Teknik Pertanian Sriwijaya Jurnal Keteknikan Pertanian Seminar Nasional Lahan Suboptimal SRIWIJAYA JOURNAL OF ENVIRONMENT
Rahmad Hari Purnomo
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Agriculture, Biological Sciences & Forestry Energy Engineering Environmental Science Public Health Other

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PENGARUH TINGGI MUKA AIR TANAH PADA PERTUMBUHAN TANAMAN CABAI (Capsicum annum) DENGAN IRIGASI BAWAH PERMUKAAN (Subsurface irrigation) Adrian Fajriansyah; Rahmad Hari Purnomo; Hilda Agustina
Jurnal Teknik Pertanian Sriwijaya Vol 1, No 1 (2012)
Publisher : Universitas Sriwijaya

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The research objective was to determine the effect of soil water level differences, porosity and semi permeable layer thickness for subsurface irrigation on chilly (Capsicum annum) crop growth.  It used split plot design with two factors of treatment and three replications for each treatment factor.  The first factor was soil water level height consisting of 4 cm, 8 cm and 12 cm as a main plot.  The second factor was combination of thickness (t) and sand (s) as well as clay (c) composition as subplot consisting of A1B1 (1 cm, 30%, 70%), A1B2 (1 cm, 40%, 60%), A1B3 (1 cm, 50%, 50%), A2B1 (1,5 cm, 30%, 70%), A2B2 (1,5 cm, 40%, 60%), A2B3 (1,5 cm, 50%, 50%). The observed parameters were water content (%), climatic data, crop length increment (cm), leaves number, flower shoots number, fruits number and crop dry matter weight (g). The results showed that the highest crop grwoth was found on 8 cm soil water level and A2B2 treatment with average value of 106.33 cm and the lowest one was found on 12 cm soil water level and A2B1 treatment with average value of 70.00 cm, respectively. The highest yield was found on 8 cm soil water level and A1B2 treatment with weight of 373.488 g. Treatments of 12 cm soil water level and A1B3 as well as A2B3 had produced zero yield. Semi permeable layer of B2 composition was the best water delivery for chilly crops, whereas 8 cm soil water level was the best water height for chilly crops.  Keywords: Soil water level, thickness and composition of sand and clay.
Penentuan Kebutuhan Air dan Koefisien Tanaman (Kc) Padi (Oryza sativa L.) di Sawah Lahan Rawa Lebak Feldy Khalid; Edward Saleh; Rahmad Hari Purnomo
Seminar Nasional Lahan Suboptimal 2019: Prosiding Seminar Nasional Lahan Suboptimal “Smart Farming yang Berwawasan Lingkungan untuk Ke
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Khalid F, Saleh E, Purnomo RH.  2019. The determination of water requirement and crop coefficient (Kc) of paddy (Oryza sativa L.) in swampy land. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal 2019, Palembang  4-5 September 2019. pp. 140-156. Palembang: Unsri Press.This research aimed to determine the water requirement and coefficient of paddy in swampy land. This research was conducted from January to June 2019. The research used an experimental method with descriptive data presented in the form of tables and graphs. The results showed that the net water requirement from the initial season, crop development, mid season and late season were 1.05 mm/day, 4.64 mm/day, 11.20 mm/day and 18.72 mm/day. The evapotranspiration measurements results (ETc) from the initial season, crop development, mid season and late season were 1.23 mm/day, 2.57 mm/day, 2.64 mm/day and 1,57 mm/day, for plant coefficients (Kc) respectively were 0.42; 0.89; 1.01 and 0.62. The largest evapotranspiration values and plant coefficient were occured during the growth period of 31 to 65 days or mid season.Keywords:  net water requirements, evapotranspiration, coefficient of crops, percolation, swampy land
Potensi Limbah Cair Pabrik Kelapa Sawit sebagai Bahan Bakar Kompor Portabel Berbasis Internet Of Things Ali Usman; Ari Wibowo; Muhammad Ridho Ramadhan; Rahmad Hari Purnomo
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Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Usman A, Wibowo A, Ramadhan MR, Purnomo RH. 2020. Palm oil mill effluent potency as a fuel for portable stove with internet of things-based monitori. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 oktober 2020. pp. xx. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Palm oil mill effluent processing in general is still carried out conventionally. However, this process requires a large area. In addition, conventional waste ponds can produce methane (CH4) and carbon dioxide (CO2) which cause the greenhouse effect. If not treated properly, the palm oil mill effluent can give bad impacts to the environment. This paper contains the potential of palm oil liquid waste into biogas energy which is applied to portable stoves with Internet of Things (IoT)-based monitoring. The potential of palm oil mill effluent is studied based on in-depth and extensive literatures. The processing of palm oil mill effluent into biogas energy can be done with anaerobic digester technology which is added with one or two different substrates. To increase the percentage of methane gas, pressure swing absorption technology can be used. The sensor used for monitoring is adjusted to the observed parameters. The MQ2 sensor is used as gas leak detector, a load cell and the HX711 module are used  as a load detector for gas cylinder, and LM35 is used as a temperature detector. Palm oil mill liquid waste has a potential to become biogas energy which can be applied in portable stoves with a Internet of Things (IoT)-based monitoring.
Aquatic and Dry Land Weeds as Potential Renewable Fibers Resources for Paper Tamrin Tamrin; Filli Pratama; Rahmad Hari Purnomo; Nessia Davitri
Sriwijaya Journal of Environment Vol 2, No 2 (2017): Water As A Vital Resource for Life
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.008 KB) | DOI: 10.22135/sje.2017.2.2.46-49

Abstract

Abstract: The investigation of aquatic and dry land weeds as fibers resources for paper making was carried out. The selected fiber resources of aquatic weeds were water hyacinth (Eicchornia crassipes) and water chestnuts (Eleocharis dulcis), and bladygrass (Imperata cylindrica) as the selected dry land weed. Research was designed as a factorial completely randomized design with two factors. The first factor was fibers origin (Eicchornia crassipes, Imperata cylindrica, Eleocharis dulcis) and the second factor was the fibers pulp slurry concentrations (30%, 50%, and 70% v/v). Results showed that the fibers origin and fibers pulp slurry concentration had significant effect on the tensile strength, mass density, water absorption, and frictional resistance of paper. The interaction between the fibers origin and fibers pulp slurry concentration had significant effect on tensile strength, frictional resistance, water absorption; but had no significant effect on mass density of paper. The paper that was made of 70% (v/v) of water hyacinth fiber pulp slurry showed the best characteristics with the tensile strength of 3.65 kgf mm-1, mass density of 0.87 g cm-3, water absorption of 0.235 g cm-2, and frictional resistance of 0.028 g cm-2.Keywords: water hyacinth, water chestnuts, bladygrass, paper.Abstrak (Indonesian): Penelitian tentang sumber serat dari gulma air dan lahan kering untuk pengolahan kertas telah dilakukan. Gulma air yang potensial sebagai sumber serat adalah eceng gondok (Eicchornia crassipes) dan purun tikus (Eleocharis dulcis); alang-alang (Imperata cylindrica) sebagai sumber serat dari gulma lahan kering. Penelitian ini menggunakan rancangan acak lengkap yang disusun secara factorial dengan dua faktor. Faktor pertama adalah jenis gulma (Eicchornia crassipes, Imperata cylindrica, Eleocharis dulcis) dan faktor ke dua adalah konsentrasi penambahan bubur serat (30%, 50%, and 70% v/v). Hasil penelitian menunjukkan bahwa jenis gulma dan konsentrasi penambahan bubur serat berpengaruh nyata (p<0.05) terhadap kekuatan tarik, massa jenis, absorpsi air dan ketahanan gesek. Interaksi antara jenis gulma dan konsentrasi penambahan bubur serat berpengaruh nyata terhadap kekuatan tarik, ketahanan gesek, abosrpsi air; tetapi berpengaruh tidak nyata terhadap massa jenis kertas. Kertas yang dibuat dari serat eceng gondok dengan konsentrasi bubur serat sebanyak 70% (v/v) menghasilkan kertas dengan sifat mekanik dan fisik terbaik dengan kekuatan tarik 3,65 kgf mm-1, massa jenis 0,87 g cm-3, absorpsi air 0,235 g cm-2, dan ketahanan gesek 0,028 g cm-2.Katakunci: eceng gondok, purun tikus, alang-alang, kertas.
Study of Water Requirements and Coefficient of Rice Crops (Oryza sativa L) in the Lebak Swamp Arjuna Neni Triana; Rahmad Hari Purnomo; Feldy Khalid
Jurnal Keteknikan Pertanian Vol. 9 No. 1 (2021): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.09.1.9-16

Abstract

Tujuan penelitian untuk mengetahui kebutuhan air dan koefisen tanaman padi di lahan rawa lebak. Metode penelitian yang digunakan pada penelitian ini adalah metode eksperimental dengan penyajian data secara deskriptif dalam bentuk tabel dan grafik. Parameter yang diamati meliputi kebutuhan air neto sawah untuk padi, nilai evapotranspirasi tanaman, nilai koefisien tanaman dan nilai perkolasi. Hasil penelitian menunjukkan bahwa kebutuhan air neto sawah berturut-turut adalah 3,26 mm/hari, 6,15 mm/hari dan 11,48 mm/hariHasil penelitian menujukkan bahwa kebutuhan air neto padi sawah bulan April sebesar 3,27 mm/hari, bulan Mei sebesar 11,71 mm/hari dan kebutuahan air padi bulan Juni 18,75. Kebutuhan air untuk tanaman padi dilahan rawa lebak selama masa tanam tidak sama setiap bulan. Pada bulan April sampai Juni berturut-turut adalah 3,26 mm/hari, 6,15 mm/hari dan 11,48 mm/hari. Pengukuran kebutuhan air awal tanam yaitu bulan April 3, 27 mm/hari, bulan Mei 11,71 mm/hari dilakukan Nilai evapotranspirasi aktual (ETc) dari fase pertumbuhan awal, fase vegetatif aktif, fase pembuahan, dan fase pematangan biji berturut-turut adalah 1,23 mm/hari, 2,57 mm/hari, 2,64 mm/hari dan 1,57 mm/hari, sedangkan untuk koefisien tanaman berturut-turut adalah 0,42; 0,89; 1,003 dan 0,62. Nilai evapotranpirasi dan koefisien tanaman terbesar terdapat pada umur pertumbuhan 31 sampai 65 hari atau fase pembuahan. Nilai perkolasi untuk setiap tahap pertumbuhan adalah 0,27 cm/hari, 3,24 cm/hari, 4,23 cm/hari dan 10,63 cm/hari.
Co-Authors Adrian Fajriansyah Ali Usman Ari Wibowo Arjuna Neni Triana Davitri, Nessia Edward Saleh Feldy Khalid Feldy Khalid Filli Pratama Hilda Agustina Muhammad Ridho Ramadhan Nessia Davitri Tamrin Tamrin Tamrin