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agriTECH

agritech
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Published by Universitas Gadjah Mada

ISSN : 02160455 EISSN : 25273825 DOI : 10.22146/agritech

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 1,392 Documents

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Komposisi Zat Gizi Tempe yang Difortifikasi Zat Besi dan Vitamin A pada Tempe Mentah dan Matang Rahayu Astuti; Siti Aminah; Agustin Syamsianah
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Anemia is one of the most common nutritional problems in developing countries, including Indonesia. Food fortificationis one of the efforts to be made among the various solutions to improve nutrition, and one of alternative enables food to be fortified was soybean tempeh. The aim of this study was to analyze nutritional composition of soyben tempeh fortified with iron and vitamin A on both uncook and cook soybean tempeh. The treatment wasused in succession given iron (FeSO4) 90, 110, 130 and 150 mg/kg wet soybeans, and vitamin A each treatment 12 mg/kg wet soybeans, and control in this study was tempeh without fortification. Statistical analysis with anova, Kruskal Wallis test, independent t test and Mann Whitney test. Result showed no differences in levels of protein, fat, moisture, ash, carbohydrate, vitamin A, Cu and Zn (p>0,05) based treatment, both uncook and cooked tempeh. In uncook tempeh, increasing iron treatment was increasing iron level soyben tempeh fortified unless there was not significant. Protein and fat content decreased significant (p<0,05) after cooked(dibacem). Ash and carbohydrate content increased significant (p<0,05) after cooked (dibacem). Vitamin A, iron (Fe), copper (Cu) and zinc (Zn) content after cooked were not difference significantly.ABSTRAKAnemia merupakan salah satu masalah gizi paling umum pada negara berkembang, termasuk Indonesia. Fortifikasi makanan merupakan salah satu upaya yang dapat dilakukan diantara berbagai solusi perbaikan gizi, dan salah satu alternatif bahan pangan yang dapat difortifikasi adalah tempe kedele. Tujuan penelitian ini untuk menganalisis komposisi zat gizi tempe yang difortifikasi zat besi dan vitamin Abaik pada tempe mentah maupun matang (dibacem). Perlakuan yang digunakan berturut-turut diberi zat besi (FeSO4) 90, 110, 130 dan 150 mg/kg kedele basah, serta vitamin A masing-masing perlakuan 12 mg/kg kedele basah, kontrol adalah tempe tanpa fortifikasi. Analisis statistik menggunakan Anova, uji Kruskal Wallis, uji t independentdan uji Mann Whitney. Hasil menunjukkan tidak ada perbedaan kadar protein, lemak, kadar air, abu, karbohidrat, vitamin A, tembaga dan seng (p>0,05) berdasarkan perlakuan baik pada tempe mentah maupun masak. Pada tempe mentah, meningkatnya kadar zat besi perlakuan meningkatkan kadar zat besi tempe fortifikasi meskipun tidak signifikan. Kadar protein dan lemak menurun secara bermakna setelah diolah (dibacem) (p<0,05). Kadar abu dan kadar karbohidrat meningkat secara bermakna(p<0,05) setelah diolah (dibacem). Kadar vitamin A, zat besi (Fe), tembaga (Cu) dan seng (Zn) setelah dimasak (dibacem) tidak berbeda nyata (p>0,05).

Nilai Cerna dan Biodegradasi Theobromin Pod Kakao dengan Perlakuan Fermentasi Menggunakan Inokulum Multi Mikrobia Suci Wulandari; Ali Agus; Mohamad Soejono; Muhammad Nur Cahyanto
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

In the recent years it has been reported that there is a multimicrobe culture which is used for fermentation of feed ingredients and complete feeds. This multi microbial culture is introduced by the name of SBP® (Saus Burger Feed). This research study aims to understand the influence of fermented cocoa pod using multi microbe which is contained in the SBP to digest and biodegrade theobromine in the cocoo pod. Cocoa pod was fermented under anaerobic conditions at room temperature. Inoculums levels which were added consist of 0; 0,05, and 0,1% respectfully. During fermentation of the cocoa pod, its samples were taken on days of 0, 3, and 6, to understand the bacterial growth, pH changes, and changes in digestibility, and biodegradation of theobromine. Furthermore, it was followed by the isolation of bacteria, to understand the characteristics of obtained bacterial isolates, and fermented cocoa pod by way of isolates, and tested its ability in producing the cellulase enzyme (CMC-ase and β-glucosidase), and its ability to degrade the theobromine. The research results showed that during fermentation of cocoa pod there were increasing of lactic acid bacteria population, and total bacteria, decreasing in the pH, increasing in the fiber digestibility, and decreasing in content of theobromine in the cocoa pod. Changes in these parameters, more real case, and the cocoa pod is fermented with a moisture content of 40% and inoculated with a dose of 0,05% SBP® with a long fermentation of 6 days. Decreasing in the fermentation of theobromine in the cocoo pod with the largest reaching of 17,02%. Increasing in the fiber digestibility, and decreasing in the content of theobromine, during fermentation of cocoa pod by inoculants SBP, it is confirmed with characteristic of bacterial isolates which is obtained from the fermented cocoa pod. There were 8 isolates of bacteria, which can produce CMC-ase enzyme, and β-glucosidase with the different level of production. Several bacterial isolates were also able to reduce the content of theobromine, in liquid culture, up to 27,07%. ABSTRAKBeberapa tahun terakhir telah diberitakan adanya kultur multi mikrobia yang dipergunakan untuk fermentasi bahan pakan dan complete feed. Kultur multi mikrobia ini dikenalkan dengan nama Saus Burger Pakan® (SBP®). Penelitianini bertujuan untuk mengetahui pengaruh fermentasi pod kakao menggunakan multimikrobia yang terkandung dalam SBP terhadap nilai cerna serat dan biodegradasi theobromin. Pod kakao difermentasi dalam kondisi anaerob pada suhu ruang. Kadar inokulum yang ditambahkan adalah 0; 0,05; dan 0,1 %. Selama fermentasi dilakukan pengambilan sampel pada hari ke-0, 3, dan 6 untuk mengetahui pertumbuhan bakteri selama fermentasi pod kakao, perubahan pH, perubahan nilai cerna, dan degradasi theobromin selama fermentasi, kemudian dilanjutkan dengan isolasi bakteri untuk mengetahui karakteristik isolat bakteri dari pod kakao terfermentasi dengan cara isolat yang diperoleh diuji kemampuannya dalam menghasilkan enzim selulase (CMC-ase dan βglukoseidase) dan kemampuannya dalam mendegradasi theobromin. Hasil penelitian menunjukkan bahwa selama fermentasi pod kakao terjadi kenaikan populasi bakteri asam laktat dan bakteri total, penurunan pH, kenaikan nilai cerna serat, dan penurunan kandungan theobromin dalam pod kakao. Perubahan parameter tersebut lebih nyata terjadi pada pod kakao yang difermentasi dengan kadar air 40% dan diinokulasi dengan SBP® dosis 0,05% dengan lama fermentasi 6 hari. Penurunan theobromin pada pod kakao fermentasi terbesar mencapai 17,02%. Kenaikan nilai cerna serat dan penurunan kandungan theobromin selama fermentasi pod kakao oleh inokulan SBP dikonfirmasi dengan karakteristik isolat-isolat bakteri yang diperoleh dari pod kakao yang terfermentasi. Ada 8 isolat bakteri yang mampu menghasilkan enzim CMC-ase dan β-glukosidase dengan tingkat produksi yang berbeda-beda. Beberapa isolat bakteri juga mampu menurunkan kandungan theobromin dalam kultur cair sampai sebesar 27,07%.

Isolation of Rhizopus oryzae From Rotten Fruit and Its Potency For Lactic Acid Production in Glucose Medium with and without Addition of Calcium Carbonate Titik Kurniawati; Retno Indrati; Sardjono Sardjono
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Studies on lactic acid production by filamentous fungi Rhizopus oryzae have been explored in the world. Unfortunately, these studies are still limited in Indonesia, particularly studies in lactic acid production by indigenous strain R. oryzae. Four strains obtained from rotten avocado and guava were potential in producing lactic acid (AT1, JT1, AT2, and AT3). Rhizopusoryzae AT3 was used for lactic acid production using 100 g/l glucose medium with and without addition of 7.5 g/l calcium carbonate (CaCO3) at initial fermentation. Addition of CaCO3 increased lactic acid concentration of 59.30%, the concentrations were 11.61 g/l and 18.495 g/l in glucose medium and glucose medium with CaCO3 addition, respectively. Glucose+CaCO3 medium also showed higher productivity, reached continuously from 1 day (0.059 g/l/h) until 5 days fermentation (0.154 g/l/h), whereas highest productivity in glucose medium was reached at 1 day fermentation (0.124 g/l/h) and continued to decrease until 5 days fermentation (0.065 g/l/h).

Sifat Organoleptik, Sifat Fisik, serta Kadar Β-Karoten dan Α-Tokoferol Emulsi Buah Merah (Pandanus conoideus) Zita Letviany Sarungallo; Murtiningrum Murtiningrum; Harry Triely Uhi; Mathelda Kurniaty Roreng; Aprida Pongsibidang
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The objective of this study was to determine the organoleptic and physical properties, and the level of β-carotene and α-tocopherol of red fruit (Pandanus conoideus) emulsion. The emulsion was made by mixing red fruit oil and water in ratio of 7:3, with addition of some emulsifiers as treatments, namely 0.20% of CMC (carboxyl methyl cellulose) (F0), 0.5% of Tween 80 and 0.2% of CMC (F1), and 0.5% of Tween 20 and 0.2% of CMC (F2). Based on the organoleptic evaluation, the most preferred formulation of red fruit emulsion was F1, which have complementary ingredients, namely 0.50% of Tween 80, 0.20% of CMC, 0.06% of sodium benzoate, 0.02% of ethylene diamine tetra acetic acid (EDTA), 1.5% of orange citrus essence, and 15% of sugar. The acceptance scores of the formulation for color, taste, aroma, and texture were 4.5 (like-extremely like), 3.8 (neutral-like), 3.8 (neutral-like), and 4.1 (like), respectively, and the level of viscosity was thick with organoleptic score of 6.1 (thick). Physically, red fruit emulsion has red orange in color, citrus in aroma, sweet in taste, viscous in texture, viscosity 20.5 dPa.s, pH 6.4, and stability 100% in strorage for 30 days at room temperature. The content of β-carotene and α-tocopherol were 14 mg/kg and 229.4 mg/kg respectively.ABSTRAKPenelitian ini bertujuan untuk mengevaluasi sifat organoleptik dan sifat fisik, serta kandungan β-karoten dan α-tokoferol dari emulsi buah merah (Pandanus conoideus). Emulsi buah merah dibuat dengan menggunakan rasio minyak dan air 7:3 dengan perlakuan jenis pengemulsi yaitu F0 (CMC (carboxyl methyl cellulose) 0,20%), F1 (Tween 80 0,5% dan CMC 0,2%), dan F2 (Tween 20 0,5% dan CMC 0,2%). Berdasarkan hasil pengujian organoleptik, formulasi emulsi buah merah yang paling disukai panelis adalah F1 dengan komposisi tween 80 0,50%, CMC 0,20%, sodium benzoat 0,06%, ethylene diamine tetra acetic acid (EDTA) 0,02%, esens orange citrus 1,5%, dan gula 15%, dengan tingkat kesukaan terhadap warna dengan nilai 4,5 (suka sampai sangat suka), rasa 3,8 (netral sampai suka), aroma 3,8 (netral sampai suka), tekstur 4,1 (suka), dan daya alir 6,1 (kental). Emulsi minyak buah merah secara fisik berwarna merah oranye, beraroma orange citrus, berasa manis, bertekstur kental, viskositas 20,5 dPa.s, pH 6,4 dan kestabilan 100% pada penyimpanan 30 hari suhu kamar. Kandungan β-karoten dan α-tokoferol masing-masing sebesar 14 mg/kg dan 229,4 mg/kg.

Manajemen Rantai Pasok dan Kinerja Agroindustri Pangan Lokal Sagu di Propinsi Maluku: Suatu Pendekatan Model Persamaan Struktural Natelda Rosaldiah Timisela; Masyhuri Masyhuri; Dwidjono Hadi Darwanto; Slamet Hartono
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The purpose of this study was to: (1) determine the mechanism of supply chain and the pattern of sago agroindustry supply chain flow, (2) analyze the relationship between the components of supply chain management (SCM) and the impact on supply chain activity improvement and agroindustry performance. Study sample of 102 sago producers were taken by simple random sampling, the study used questionnaires and in-depth interviews with respondents. The data was analyzed by qualitative and quantitative analysis. Qualitative analysis was used to describe the mechanism and pattern of sago agroindustry supply chain flow. While quantitative analysis was used to analyze the components, SCM activity improvement and agroindustry performance by using a structural equation model. The results showed that the mechanism of sago agroindustry supply chain is the creation of collaboration and coordination among supply chain actors ranging from upstream to downstream. The pattern of supply chain flow consists of raw material flow, product flow, financial flow and information flow which is run well. The results of the analysis of the structural statistics index measurement were GFI (0.901), AGFI (0.857), TLI (.994), CFI (0.995), Cmin / DF (1.022), RMSEA (0.015), the probability (0.423) and the value of χ2 (84.834). They are within the range of values expected to meet the criteria.ABSTRAKTujuan penelitian ini adalah 1) mengetahui mekanisme rantai pasok dan pola aliran rantai pasok agroindustri sagu, 2) menganalisis pengaruh komponen-komponen manajemen rantai pasok (MRP)terhadap peningkatan aktivitas rantai pasok dan kinerja agroindustri. Sampel penelitian berjumlah 102 pengrajin sagu diambil secara simple random sampling, penelitian menggunakan kuesioner dan wawancara mendalam dengan responden. Analisis data secara kualitatif dan kuantitatif. Analisis kualitatif untuk mendeskripsikan mekanisme dan pola aliran rantai pasok agroindustri sagu. Sedangkan analisis kuantitatif untuk menganalisis komponen, aktivitas rantai pasok dan kinerja agroindustri menggunakan model persamaan struktural. Hasil penelitian menunjukan bahwa mekanisme rantai pasok agroindustri sagu yang terjadi yaitu terciptanya kolaborasi dan koordinasi diantara pelaku rantai pasok mulai dari hulu sampai ke hilir. Pola aliran rantai pasok yang terdiri dari aliran bahan baku, aliran produk, aliran finansial dan aliran informasi berlangsung baik dan lancar. Hasil analisis terhadap pengukuran indeks struktural statistik seperti indeks pengukuran GFI (0,901), AGFI (0,857), TLI (0,994), CFI (0,995), CMIN/DF (1,022), RMSEA (0,015), probabilitas (0,423) dan nilai χ2 (84,834). Data tersebut berada dalam rentang nilai yang diharapkan memenuhi kriteria.

Analisa Kelayakan Finansial Pengembangan Usaha Produksi Komoditas Lokal: Mie Berbasis Jagung Parama Tirta Wulandari Wening Kusuma; Nur Kartika Indah Mayasti
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Corn processing into noodles not only for increasing the value to this commodity but also could be a business opportunity. More over also develop the diversification non wheat and non rice product or food. Used corn as a raw material noodles is one of the efforts to reduce reliance on wheat flour, the mainly raw material for noodle. Therefore, the financial assessment of the development of the noodles based on corn is very strategic. The result showed that the financial feasibility are Net Present Value is positive amounted Rp 34.772.903, Internal Rate of Return of 59.19%, Payback Periode for 13 months, Net B/C ratio by 1.3, and Sensitivity analysis showed that the 5% decrease in revenue and 5% increase in operating expenses, effect on the viability of the project. From the above considerations investment criteria, indicates that the business of instant noodle based on corn is feasible to run.ABSTRAKPengolahan jagung menjadi mie dapat menjadi peluang usaha untuk meningkatkan nilai tambah jagung dan juga menjadikan diversifikasi olahan pangan non gandum dan non beras. Penggunaan jagung sebagai bahan baku mie merupakan salah satu upaya yang dapat dilakukan untuk mengurangi ketergantungan terhadap tepung terigu, bahan baku utama pembuatan mie pada umumnya. Oleh karena itu, kajian finansial terhadap pengembangan usaha produksi mie berbasis jagung menjadi sangat strategis. Dari perhitungan analisa finansial diperoleh hasil Net Present Value bernilai positif sebesar Rp 34.668.709, Internal Rate of Return sebesar 59,19 %, Payback Periode selama 13 bulan, rasio B/C sebesar 1,3 apabila asumsi yang direncanakan terpenuhi. Analisis sensitivitas menunjukkan bahwa penurunan pendapatan 5% dan kenaikan biaya operasional 5% berpengaruh terhadap kelayakan proyek. Dari pertimbangan kriteria investasi di atas menunjukkan bahwa kegiatan usaha produksi mie jagung instan layak untuk dijalankan selama proyek berjalan sesuai dengan asumsi dan parameter teknis yang ditentukan.

Model Simulasi Pengembangan Sistem Irigasi untuk Tanaman Jagung di Lahan Sawah dan Lahan Kering (Studi Kasus Pada Usahatani Jagung di Kabupaten Kediri) Agung Prabowo; Sigit Supadmo Arif; Lilik Sutiarso; Bambang Purwantana
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Corn crop irrigation system in Kediri has not been able to support its productivity to meet the needs of the animal feed industry raw materials in East Java. To achieve the sustainability of corn crop irrigation system development is required planning through appropriate systems approach. The purpose of this research is to build a simulation model of corn crop irrigation system development in paddy field and dry land to increase production and incomes of farmers. The method used in this study is the method of system approach. System approach was used to formulate the simulation model of an irrigation system for corn crops. The time limit of simulation model was started in 2012 until 2035. The structure of the model was grouped into four sub models, namely: environment, technology, farming and management. In this simulation model was conducted in 4 scenarios: 1) control, 2) increasing the Cropping Intensity (CI) of corn 20% and the development of pump irrigation in dry land, 3) increasing CI of corn 20% and the development of pump irrigation in dry land and the paddy field, and 4) increasing CI of corn 20% and the development of pump irrigation in dry land and utilizing an existing irrigation network in the paddy field. Measuring tools for success in development of the irrigation system are the highest increase for maize production and farmer’s income. From this result it was concluded that scenario 4 was the best scenario to be implemented because it can increase the production was 114.33% and farmer income was 130.93% with an investment cost of Rp. 1141.27, -/kg of corn.ABSTRAKSistem irigasi tanaman jagung yang ada di Kabupaten Kediri belum mampu mendukung peningkatan produksi untuk memenuhi kebutuhan bahan baku industri pakan ternak di Jawa Timur. Untuk mencapai keberhasilan program pengembangan sistem irigasi tanaman jagung tersebut diperlukan perencanaan melalui metode pendekatan sistem yang tepat. Tujuan penelitian ini adalah membangun model simulasi pengembangan sistem irigasi tanaman jagung di lahan sawah dan lahan kering untuk meningkatkan produksi dan pendapatan petani jagung. Metode yang digunakan dalam penelitian ini adalah metode pendekatan sistem. Pendekatan sistem digunakan untuk merumuskan model simulasi pengembangan sistem irigasi untuk tanaman jagung. Batasan waktu model simulasi ini dimulai pada tahun 2012 sampai dengan 2035. Struktur model dikelompokkan menjadi empat submodel, yaitu: lingkungan, teknologi, usahatani dan pengelolaan. Pada model simulasi ini dilakukan 4 skenario, yaitu : 1) kontrol, 2) meningkatkan intensitas penanaman (IP) jagung 20% dan pengembangan irigasi pompa di lahan kering, 3) meningkatkan IP jagung 20% dan pengembangan irigasi pompa di lahan kering serta di lahan sawah, dan 4) meningkatkan IP jagung 20% dan pengembangan irigasi pompa di lahan kering dan memanfaatkan jaringan irigasi yang ada di lahan sawah. Sebagai tolok ukur keberhasilan pengembangan sistem irigasi tersebut adalah terjadi peningkatan yang tertinggi untuk produksi dan pendapatan petani jagung. Dari hasil penelitian ini diperoleh kesimpulan bahwa skenario 4 merupakan yang terbaik untuk dilaksanakan karena mampu meningkatkan produksi 114,33% dan pendapatan petani 130,93% dengan biaya investasi Rp. 1.141,27,-/kg jagung.

Rancangbangun Aktuator Pengendali Iklim Mikro di dalam Greenhouse untuk Pertumbuhan Tanaman Sawi (Brassica rapa var.parachinensis L.) Mareli Telaumbanua; Bambang Purwantana; Lilik Sutiarso
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Cultivation of mustard (Brassica var rappa Parachinensis L.) in the field has many obstacles such as pests, wind, flood, temperature, soil moisture, and solar radiation which are able to distrurb the plant growth. The impact is distrubing of plant growth thus affecting productivity. Cultivation in greenhouse is an appropriate alternative to controlling the constraints. Control system for microclimate greenhouse was designed using microcontroller ATMega8535. The system was developed using five sensors i.e.: air temperature and humidity, soil temperature, soil moisture, and solar radiation and three actuators, i.e.: fan actuator, water pump actuator, and artificial photosynthesis light actuator. The equipment of control was placed in the greenhouse and connected to computer for sending microclimate data for 32 days of observation. The result revealed that fan actuator has accuracy of 95,46% with speed controlling temperature of 58,70 minute. The efficiency of water pump actuator was 98,01%, with the speed to controls soil moisture of 31,83 minute. Photosynthetic light actuator showed the speed of response to the setting point of photosynthesis light <1 sec (± 10 ms). The experimental research showed that the high, dimensions of leaves, weight, and the number of leaves of mustard plant in the greenhouse were better than plant outside the greenhouse.ABSTRAKBudidaya tanaman sawi (Brassica rapa var. parachinensis L.) di lahan terbuka memiliki banyak kendala seperti serangan hama, angin, banjir, suhu lingkungan, kelengasan tanah hingga penyinaran yang tidak sesuai dengan syarat pertumbuhan tanaman. Dampaknya adalah terganggunya pertumbuhan tanaman sehingga mempengaruhi produktivitas. Budidaya tanaman di rumah tanaman (greenhouse) merupakan alternatif yang baik untuk mengontrol kendala tersebut. Sistem kontrol pengendalian iklim mikro untuk greenhouse telah dirancang dengan menggunakan mikrokontroler AVR ATMega8535. Sistem kontrol dikembangkan dengan menggunakan lima sensor yaitu sensor suhu dan kelembaban lingkungan, sensor suhu tanah, sensor kelengasan tanah, dan sensor intensitas sinar matahari. Rancangan memiliki tiga aktuator yaitu aktuator kipas, aktuator pompa air, dan aktuator lampu fotosintesis. Rancangan diletakkan di dalam greenhouse yang terhubung dengan komputer untuk mengirim data iklim mikro selama 32 hari pengamatan. Melalui penelitian ini telah dihasilkan aktuator kipas yang memiliki nilai akurasi 95,46% dengan nilai kecepatan pengendalian untuk mengendalikan suhu 58,70 menit. Aktuator pompa air menunjukkan nilai akurasi 98,01%, dengan kecepatan mengendalikan kelengasan tanah 31,83 menit. Aktuator lampu fotosintesis menunjukan nilai kecepatan respon terhadap nilai setting point untuk menyalakan lampu fotosintesis < 1 detik (± 10 mS). Hasil penelitian menunjukkan, bahwa tanaman yang berada di dalam greenhouse memiliki tinggi, dimensi daun, berat basah, dan jumlah daun yang lebih baik dibandingkan dengan di luar greenhouse.

Perhitungan Nilai Nisbah Hantaran Sedimen dengan Menggunakan kurva Sedimen dan Model Erosi Tanah Nining Wahyuningrum; Putu Sudira; Haryono Supriyo; Sambas Sabarnurdin
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Prolonged soil erosion and sedimentation have negative effect on land quality showing by decreasing land productivity, in addition, sedimentation process may cause decreasing function of hydrologic infrastructures. In watershed scale it is important to monitor both important processes. The relationship between the amount of onsite erosion and sedimentation at the watershed outlet is formulated in the Sediment Delivery Ratio (SDR). SDR is the ratio between the erosion that occurs in the entire basin with the amount of sediment in the outlet of a watershed. This study aimed to calculate SDR value of two watersheds which have different topographic condition and land cover types composition. The study was conducted in two sub-watersheds namely Tapan and Ngunut I. Erosion calculation used USLE formulae while prediction of water discharge and sediment discharge utilized rating curve and sediment rating curve. The study shows that (1) SDR of Tapan is higher than SDR of Ngunut I, it indicates that there are others source of sediment beside sheet erosion which is transported to the outlet of watershed, (2) The value of SDR fluctuate according to fluctuations in monthly rainfall and runoff, (3) SDR is less sensitive to land cover types rather than of topographic factor (slope, drainage density an watershed area).ABSTRAKProses erosi dan sedimentasi yang berkepanjangan dapat memberi pengaruh negatif terhadap kualitas lahan, selain itu proses sedimentasi juga dapat mengakibatkan menurunnya fungsi bangunan hindrologis. Dalam skala Daerah Aliran Sungai (DAS) kedua proses ini penting untuk dimonitor. Hubungan antara besarnya erosi ditempat dan sedimentasi pada luaran DAS dirumuskan dalam bentuk nisbah hantaran sedimen (Sediment Delivery Ratio, SDR). SDR merupakan rasio antara erosi yang terjadi pada seluruh DAS dengan jumlah sedimen pada daerah outlet. Studi ini bertujuan menghitung besarnya nilai SDR pada dua DAS dengan kondisi topografi dan jenis penutupan lahan yang berbeda. Penelitian dilakukan di dua sub DAS Ngunut I dan Tapan. Perhitungan erosi dilakukan dengan metode USLE sedangkan perhitungan sedimen dengan menggunakan rating curve dan sediment rating curve. Hasil analisis menunjukkan bahwa (1) Diperoleh nilai SDR Sub DAS Tapan lebih tinggi (2,37) daripada nilai SDR Sub DAS Ngunut I (0,047). Hal ini mengindikasikan adanya sumber materi sedimen lain selain dari erosi lembar yang terbawa ke luaran DAS, (2) Nilai SDR berfluktuasi sesuai dengan fluktuasi bulanan hujan dan limpasan, (3) Jenis penutupan lahan kurang berpengaruh terhadap SDR dibandingkan dengan topografi (kemiringan lahan, kerapatan aliran dan luas DAS).

Uji Unjuk Kerja Sistem Pengering Dehumidifier untuk Pengeringan Jahe Sri Utami Handayani; Rahmat Rahmat; Seno Darmanto
agriTECH Vol 34, No 2 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Indonesian ginger market share has decreased in recent years due to competition with ginger products from other countries because of its quality still does not meet the standards. To meet the quality standards, post-harvesting processing technology should be improved. Some literature suggest that the active content of ginger will remain high after drying when the drying is performed at low or room temperature. So it will be more effective when done with a dehumidifier mechanism. This study aimed to test the performance of the dehumidifier drying equipment which includes distribution of temperature and humidity, drying capacity and capability. Dryer with a dehumidifier using a modified split AC by adding heater and a drying box. While the products studied are ginger. The results showed that the equipment is capable of producing inlet air temperature of 60°C and RH up to 0% as well as lowering the water content from 36% up to 0.1% in 7 hours.ABSTRAKPangsa pasar jahe Indonesia mengalami penurunan dalam beberapa tahun terakhir karena kalah bersaing dengan produk jahe dari negara lain akibat dari kualitasnya yang masih belum memenuhi standar. Untuk memenuhi standar mutu, teknologi pengolahan pasca panen harus lebih dikembangkan. Beberapa studi literatur menunjukkan bahwa kandungan zat aktif jahe akan tetap tinggi apabila pengeringan dilakukan pada temperatur rendah sehingga akan lebih efektif bila dilakukan dengan mekanisme dehumidifier.Penelitian ini bertujuan untuk menguji unjuk kerja peralatan pengering dehumidifier yang meliputi distribusi suhu dan kelembaban udara, kapasitas dan kemampuan pengeringan. Peralatan pengering dengan dehumidifier menggunakan AC split yang dimodifikasi dengan menambahkan heater dan ruang pengeringan. Sedangkan produk yang diteliti adalah jahe. Hasil penelitian menunjukkan bahwa peralatan mampu menghasilkan udara dengan temperatur udara masuk ruang pengering 60 oC dan RH hingga 0% serta menurunkan kadar air dari 36% hingga menjadi 0,1% dalam waktu 7 jam.

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Fiametta Ayu Purwandari

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Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

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Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Fiametta Ayu Purwandari

Contact Email fiametta@ugm.ac.id

Phone +6285712601130

Journal Mail Official agritech@ugm.ac.id

Editorial Address Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Fiametta Ayu Purwandari

Contact Email
fiametta@ugm.ac.id

Phone
+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA