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

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Abstract

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.
Aquatic and Dry Land Weeds as Potential Renewable Fibers Resources for Paper Tamrin, Tamrin; Pratama, Filli; Purnomo, Rahmad Hari; Davitri, Nessia
Sriwijaya Journal of Environment Vol 2, No 2 (2017): Water As A Vital Resource for Life
Publisher : Program Pascasarjana Universitas Sriwijaya

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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.
Aplikasi Irigasi Tetes (Drip Irrigation) dengan Berbagai Media Tanam pada Tanaman Pakcoy (Brassica rapa L.) Triana, Arjuna Neni; Purnomo, Rahmad Hari; Juwita, Ratna
Seminar Nasional Lahan Suboptimal 2018: Prosiding Seminar Nasional Lahan Suboptimal "Tantangan dan Solusi Pengembangan PAJALE dan Kel
Publisher : Seminar Nasional Lahan Suboptimal

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Abstract

Triana et al, 2019. Application of Drip Irrigation using Variety of Growing Media on Pakcoy (Brassica rapa L.). pp. 236-241.The purpose of this research was to determine the effects of irrigation water quantity level and growing media on water content, growth pakcoy (Brassica rapa L.) and water use efficiency using drip irrigation.systems. The method used in this research was Random Group Factorial Design using two factors which were the irrigation water quantity level and the growing media with three repetitions. The observed parameters were water content, water use efficiency, temperature, relative humidity, plant height, number of leaves and stover weight. The reseach result showed that the pakcoy plant best water use efficiency was at A3B4 treatment (irrigation water quantity 110 % with growing media compound ultisol soil, chorcoal husk and fertilizer fern) which was 4.351 kg/m3 with 104.67 grams wet pakcoy plant stover and the most inefficient pakcoy plant water use was at A1B1 treatment (irrigation water quantity 90 % with growing media compound ultisol soil, and husk charcoal) with water use efficiency was 1.351 kg/m3 and 27.33 grams wet pakcoy plant stover.
RANCANG BANGUN DAN UJI TEKNIK KOMPOR BERBAHAN BAKAR LIMBAH BIOMASA PERTANIAN Purnomo, Rahmad Hari; Kuncoro, Endo Argo; Wahyuni, Dian
BUANA SAINS Vol 14, No 2 (2014)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.073 KB) | DOI: 10.33366/bs.v14i2.342

Abstract

The research objective was to design and test of stove using agricultural waste biomass fuel. Engineering design was used in this research. The collected data was presented and tabular and graphical forms. This research was consisted of design, fabrication, technical test and perfomance analysis of stove which used agricultural waste biomass fuel. The observed parameters were combustion operational time, fuel consumption rate, specific gasification rate, combustion efficiency, heat energy input and ash percentage. Results showed that the highest combustion operational time was found on rice husk with magnitude of 0.43 hour and the lowest was found on wood chips with magnitude of 0.22 hour. The highest fuel consumption and gasification rates were found on wood chips with magnitude of 3.92 kg/h and 74.81 kg/m2h, whereas the lowest was found on rice husk with magnitude of 2.33 kg/h and 44.01 kg/m2h. The highest heat energy input value was found on wood chips with magnitude of 5,033.34 kcal, whereas the lowest was found on rice husks with magnitude of 3,411.29 kcal. The highest combustion efficiency was found on rice husk with magnitude of 4.67 % and the lowest was found on acacia leaves of 3.04 %. The highest ash percentage was found at rice husk with magnitude of 30 % and the lowest of 15 % was found on wood chips
Penentuan Kebutuhan Air dan Koefisien Tanaman (Kc) Padi (Oryza sativa L.) di Sawah Lahan Rawa Lebak Khalid, Feldy; Saleh, Edward; Purnomo, Rahmad Hari
Seminar Nasional Lahan Suboptimal 2019: Prosiding Seminar Nasional Lahan Suboptimal ?Smart Farming yang Berwawasan Lingkungan untuk Ke
Publisher : Seminar Nasional Lahan Suboptimal

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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