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ANALISIS IKLIM MIKRO PADA BUDIDAYA PADI DENGAN SISTEM TANAM LEGOWO NYISIP Adiguna, I Wayan; Tika, I Wayan; Sumiyati, S
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 1 (2020): in press
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

This research was conducted to determine the effect of nyisip in raw of legowo planting system toward microclimate and paddy?s productivity of Cigeulis variety. This research using completely randomized design, with six treatments and 3 replications, they are: K0 (the treatment which appropriated to farmers custom), K1 (the treatment of legowo 2:1 nyisip), K2 (the treatment of legowo 3:1 nyisip), K3 (the treatment of legowo 4:1 nyisip), K4 (the treatment of legowo 5:1 nyisip) and K5 (the treatment of legowo 6:1 nyisip). The result of this research shown that the treatment of K1 got the higest intensity of sun shine at 23.817 lux and got the highest temperature at 27,20°C. The treatment of K0 has the highest relativity humudity at 79,30%. The treatment of K5 is the highest productivity per area at 6,06 ton/ha.
STRATEGI PENGENDALIAN PASCAPANEN MUTU TOMAT (SOLANUM LYCOPERSICUM) DI DESA ANGSERI KABUPATEN TABANAN BALI. Siahaan, Jun Marito; Aviantara, I Gusti Ngurah Apriadi; Tika, I Wayan
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): inpress
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Tingginya kerusakan tomat selama pascapanen merupakan salah satu permasalahan yang dihadapi dalam memenuhi harapan konsumen. Pengendalian pascapanen merupakan kegiatan akhir yang harus dilakukan untuk dapat menjaga mutu tomat tetap dalam kondisi baik. Tujuan penelitian ini adalah mengindentifikasi kepentingan dan kepuasan konsumen yang menjadi atribut kunci serta menganalisis penyebab kemunduran mutu tomat dan menganalisis strategi yang tepat untuk mengendalikan mutu tomat. Kepentingan dan kepuasan konsumen akan mutu tomat dikonversikan dengan metode IPA (Importance Performance Analysis). Atribut mutu tersebut yaitu tampilan segar, kebersihan kulit buah, warna kulit buah, rasa manis dan asam, kadar air tomat, dan bebas dari rasa asing. Penurunan mutu tomat disebabkan oleh beberapa faktor berikut: (1) bahan baku yaitu: cara panen, perawatan setelah panen, teknir sortir, pengemasan, (2) manajemen yaitu: penerapan food safety management, (3) tenaga kerja yaitu: kurang skll, (4) lingkungan yaitu: bencana alam, iklim dan cuaca, (5) mesin dan metode yaitu: transportasi dan penyimpanan. Formulasi dan penentuan strategi prioritas dilakukan dengan pendekatan Strengths Weakness (SWOT) dan Opportunities Quantitative Strategies Planning Matrix (QSPM). Skor bobot matriks faktor internal yang diperoleh adalah 3,193 yang berarti berada pada posisi kuat sementara pada matriks faktor eksternal memperoleh skor adalah 3,125 yang berarti peluang belum diptimalkan dan ancaman masih belum dapat diatasi. Prioritas tertinggi yang dapat dipilih sebagai alternatif strategi adalah penambahan modal investasi juga mengendalikan penanganan budidaya dan pascapanen di optimalkan serta memproduksi tomat yang berkualitas dan juga memanfaatkan teknologi terbarukan dengan bobot sebesar 6,019.     The high potential of damaged tomatoes during postharvest is one of the mostly faced problem in satisfying costumer expectation. Postharvest handling is the final step that required to maintain good quality of tomatoes. The purpose of this study to identify costumers need and satisfaction, analyze the cause of tomatoes quality deterioration and analyze the right strategies to control quality of tomatoes. The customers need and satisfaction converted using IPA (Importance Performance Analysis) method. The quality attributes as follows : fresh, clean, colour, sweet and acid taste, moisture content, and no extraneous taste. The quality deterioration of tomatoes caused some of factors such as : (1) raw material : harvest method, postharvest handling, sorting method, packaging; (2) management system : food safety management application; (3) human resources : training and skills; (4) environment : natural disaster, climate and weather change; (5) equipment and method application : transportation and storage method. The formulation and strategies determination using Strengths Weakness Opportunities and Threats (SWOT) and Opportunities Quantitative Strategies Planning Matrix (QSPM) approaches. The final internal factor matrix is 3,193 which means on strong position and the final external factor matrix is 3,125 which means the opportunities not fully optimalized yet and the threats doesn?t solved. The highest priorities that can be chosen as alternative strategies is increasing investment assets while controlling cultivation development and optimalized postharvest to produce the best quality of tomatoes using renewable technology up to 6,019.
PERANCANGAN SISTEM IRIGASI OTOMATIS DENGAN SENSOR RESISTIF BERBASIS KADAR AIR TANAH PADA TANAMAN RUKOLA (ERUCA SATIVA) Antara, I Putu Agus Sumi; Tika, I Wayan; Budisanjaya, I Putu Gede
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 4 No 1 (2016): Maret
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Rukola (Eruca sativa) is a horticultural plants originating from the Mediterranean with a high of vitamins such as A, B complex, C, and K. Rukola can be growed well at low ambient temperatures with soil moisture content between 20% - 40%. Therefore, irrigation control system is required to obtain at the appropriate moisture content for rukola plants. The objective of this research was to build an automatic irrigation system with the resistive sensor based on soil moisture, that can perform automatic irrigation accordance optimal water content in rukola cultivation. The control system in this research was created using the multiplexing control system with resistive AC stainless steel sensors. The sensors was read the resistive of soil moisture that calibrated into a percent (%) of water content and displayed on the display per second. The output of the pump is controlled by limits of water content that programmed by the microcontroller AVR AT Mega 8535. Calibration control system conducted at field capacity and permanent wilting point. Automatic irrigation control system was able to work well with the limits defined soil moisture is 20% lower limit and 39% upper limit. The first testing results of control system I have R2 0.8462 with RMSE values 0.02 and control system II have R2 0.8603 with RMSE value 0.02. The second test of control system I have R2 0.8896 with RMSE value 0.01 and control system II have R2 0.9121 with RMSE value 0.02. If R2 that exceeds the value of 0.7 and RMSE (Root Mean Square Error) ? 0.1, then the performance of the automatic irrigation control system is working accurately.
KAJIAN POLA TITIK LAYU TANAMAN PAPRIKA (CAPSICUM ANNUUM L.) DAN KAPASITAS LAPANG PADA BEBERAPA MEDIA TANAM Widnyana, I Made Gede; Sumiyati, S; Tika, I Wayan
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 5 No 1 (2017): maret
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Penelitian ini bertujuan untuk mengetahui pola titik layu tanaman paprika (Capsicum annuum L.) dan kapasitas lapang pada beberapa media tanam yang digunakan. Metode penelitian yang digunakan adalah metode kuantitatif yang terdiri dari tiga perlakuan menggunakan media tanam diantaranya, P1 : media arang sekam, P2 : media tanah campur kompos dengan perbandingan 2 : 1 dan dan P3 : media tanah. Kadar air kapasitas lapang, titik layu sementara dan air tersedia untuk seluruh perlakuan yang diamati mulai minggu ke-2 sampai minggu ke-14, kapasitas lapang pada media arang sekam, tanah campur kompos dan tanah yaitu berturut-turut dari 79,11% sampai 82,06%, 44,10% sampai 46,31%, dan 36,20% sampai 37,41%. Kadar air titik layu sementara pada arang sekam, tanah campur kompos dan media tanah yaitu berturut-turut mengalami penurunan dari 42,99% sampai 25,84%, 13,95% sampai 8,95% dan 14,39% sampai 10,23%. Air tersedia bagi taaman paprika pada media arang sekam, tanah campur kompos dan tanah yaitu berturut-turut mengalami peningkatan 5,20cm sampai 9,65cm, 5,72cm sampai 6,33cm dan 3,43cm sampai 4,86cm. The objective of this study were to determine of wilting point pattern and field capacity in cultivation of sweet pepper (Capsicum annuum L.) in diffferents planting medium. The methodology that used in this study was quantitative method. Three different planting medium were set namely : P1 : rice husk charcoal media , P2: soil and compost mixed media with 2 : 1 ratio and  P3: soil media. The water content of field capacity, temporary wilting point and available water for all treatments were observed start in week 2 to week 14 field capacity on rice husk charcoal, soil and compost mixed and soil media that row from 79.11% to 82,06%, 44.10% to 46.31%, and 36.20% to 37.41%. While the soil mousture of temporary wilting point of rice husk charcoal, soil and compost mixed and soil media is descreased from 42,99% to 25,84%, 13,95% to 8,95% and 14,39% to 10,23%. Available water of sweet paper plants on rice husk charcoal, soil and compost mixed and soil that is row increased from 5,20 cm to 9,65 cm, 5,72 cm to 6,33 cm and 3,43 cm to 4,86 cm.
ANALISIS KEBUTUHAN TRAKTOR BERDASARKAN KETERSEDIAAN AIR PADA SUBAK DI KABUPATEN TABANAN Tikawa, I Gede Berliyantha; Tika, I Wayan; Gunadnya, Ida Bagus Putu
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): inpress
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Mengolah tanah dalam kegiatan pertanian memerlukan pengaturan kebutuhan traktor secara optimal. Jumlah traktor yang seharusnya dibutuhkan dengan luas lahan yang ada berdasarkan pada ketersediaan air di suatu subak dengan tujuan untuk memperoleh produktivitas hasil olah tanah yang optimal maka diperlukan traktor dengan ketersediaan air irigasi yang mengairi lahan untuk memperlancar pengolahan dan mengefisienkan tanah tersebut. Tujuan penelitian ini adalah untuk mengetahui banyaknya traktor yang diperlukan berdasarkan ketersediaan air dengan membandingkan traktor yang tersedia pada subak. Penelitian ini menggunakan pendekatan analisis kuantitatif melalui metode survey dengan mencari data primer yaitu pengukuran debit tersedia dibangunan bagi dan pengukuran dilahan. Hasil penelitian menunjukkan bahwa traktor yang dibutuhkan berdasarkan ketersediaan air di subak Kabupaten Tabanan yang ada di hulu, tengah dan hilir. Untuk sembilan subak yang ada di daerah hulu, traktor rotari yang diperlukan dengan rata-rata 6 traktor dapat mengolah lahan mencapai 87,3 ha atau 1 unit traktor dapat mengerjakan lahan dengan luas 14,6 ha dengan rata-rata konsumsi air untuk 1 unit traktor yaitu 27,16 lt/dt. Untuk sembilan subak yang ada di daerah tengah traktor yang diperlukan dengan rata-rata 5 traktor dapat mengolah lahan dengan luas 69 ha atau 1 unit traktor dapat mengerjakan lahan dengan luas 13,8 ha dengan rata-rata konsumsi air untuk 1 unit traktor yaitu 26,84 lt/dt. Sedangkan sembilan subak yang ada di daerah hilir traktor yang diperlukan dengan rata-rata 10 traktor dapat mengolah lahan dengan luas 114,5 ha atau 1 unit traktor dapat mengerjakan lahan dengan luas 11.8 ha dengan rata-rata konsumsi air untuk 1 unit traktor yaitu 12,1 lt/dt.   Cultivating land in agricultural activities requires optimal regulation of tractor requirements. The number of tractors that should be needed with the available land area is based on the availability of water in a subak with the aim of obtaining optimal tillage productivity, so a tractor with the availability of irrigation water is needed to irrigate the land to facilitate processing and streamline the land. The purpose of this study is to determine the number of tractors needed based on water availability by comparing the tractors available on subak. This study uses a quantitative analysis approach through a survey method by finding primary data, namely the measurement of discharge available for building and land measurements. The results showed that the tractors needed were based on the availability of water in the subaks of Tabanan Regency in the upstream, middle and downstream areas. For the nine subaks in the upstream area, the required rotary tractor with an average of 6 tractors can cultivate land reaching 87,3 ha or 1 tractor unit can work on an area of ??14,6 ha with an average water consumption for 1 unit of tractor which is 27,16 lt/sec. For the nine subaks in the central area of ??the tractor needed, with an average of 5 tractors, an area of ??69 ha or 1 unit of tractor can work on an area of ??13,8 ha with an average water consumption for 1 tractor unit, 26, 84 lt/sec. While the nine subaks in the downstream area of ??the tractor needed with an average of 10 tractors can cultivate land with an area of ??114,5 ha or 1 unit of tractor can work on land with an area of ??11.8 ha with an average water consumption for 1 tractor unit that is 12,1 lt/sec.
INTENSITAS SERANGAN HAMA TIKUS TANAMAN PADI MENGGUNAKAN METODE PENGAMATAN KELILING BERHUBUNGAN LINIER DENGAN LUAS SERANGAN HASIL ANALISI FOTO UDARA Rahadi, I Ketut Satria; Wijaya, I Made Anom Sutrisna; Tika, I Wayan
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 7 No 2 (2019): September
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2019.v07.i02.p08

Abstract

Hama tikus adalah hama yang dapat menyebabkan kegagalan panen tanaman padi. Metode yang digunakan untuk mengukur besaran serangan hama tikus adalah metode pengambilan contoh dan pendekatan foto udara. Namun dari kedua metode ini tingkat serangan yang dihasilkan belum diketahui korelasinya. Maka dari itu dilakukannya penelitian ini untuk mendapatkan hubungan antara intensitas dan luas serangan hama tikus tanaman padi. Tahapan penelitian ini adalah survei lokasi yang terserang hama tikus, persiapan alat, pengambilan foto udara, pengambilan sampel untuk perhitungan intensitas serangan, pengolahan citra, perhitungan luas serangan, analisis regresi dan validasi. Intensitas serangan dihitung menggunakan perhitungan secara mutlak, sedangkan luas serangan dihitung menggunakan metode pengolahan citra foto udara yang dikembangkang oleh Widodo. Analisis regresi menunjukan bahwa hubungan antara intensitas serangan dengan luas serangan memiliki koefisien determinasi 0,889 dan persamaan regresi yang diperoleh y = 1,138x dengan faktor kesalahan 8,947%. Intensitas serangan hama tikus tanaman padi menggunakan metode pengambilan contoh berhubungan linier dengan luas serangan hasil analisis foto udara yang dikembangkan oleh Widodo.   Rat pests are pests that can cause crop failure in rice plant. The method used to calculate the number of rodent pest attacks is the method of sampling and obtaining aerial photographs. But from these two methods the level of attack produced is not known to correlate. So this study purpose to obtain a relationship between intensity of attack with area of attack rat pest of rice plants. The stages of this study were location surveys that were attacked by rat pests, preparation of tools, aerial photography, and sampling for the calculation of attack intensity, image processing, area attack, regression analysis and validation. The intensity of attacks is calculated using total calculations, while broad attacks are calculated using the aerial image processing method developed by Widodo. Regression analysis shows the relationship between the intensity of ??attack with the area of ??attack has a determination coefficient of 0.889 and the regression coefficient obtained y = 1.138x with an error factor of 8.947%. The intensity of rat pest attacks using linear related sampling methods with broad attack results from aerial photo analysis developed by Widodo.
PENGARUH PERBANDINGAN KOMPOSISI BAHAN BAKU TERHADAP KUALITAS DAN LAMA WAKTU PENGOMPOSAN Atmaja, I Ketut Merta; Tika, I Wayan; Wijaya, I Made Anom. S
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 5 No 1 (2017): maret
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

The rice biomass potential of red rice (local varieties) such as rice straw and chicken manure can be utilized as a raw material for composting. This research aimed to determine the best composition ratio of compost raw materials  and to find the minimum time to produce compost with such quality. This research used a treatment composition ratio of rice straw and chicken manure where P1 = (6 : 8), P2 = (6 : 7), P3 = (6 : 6), P4 = (6 : 5), and P5 = (6 : 4 ). The dimension of composting pile were 1 m length, 1 m height, and 1 m wide. Each treatment material assumed 50 kg. Piles of compost material in each treatment were covered using a tarp to keep the temperature and protect from outside interference during the composting process. The parameters measured were temperature, moisture content, yield, pH, nitrogen, carbon, and C/N ratio. The composting process lasted for 78 days with temperature ranged 30,1 ? 51,1°C. Compost moisture ranged from 31,74 ? 32,59%. Compost yield ranged 59 -64%, and pH ranged between 7,2 ? 7,5. In general, the quality of the produced compost accordance to SNI 19-7030-2004 with a final C/N ratio was 16 - 33. The P1 which have composition ratio of rice straw and chicken manure 6 : 8 was the best treatment which have C/N ratio of 16 and for 63 days of composting process.
KAJIAN FREKUENSI DAN LAMA PEMAPARAN MEDAN ELEKTROMAGNETIK PADA FASE GENERATIF TERHADAP PRODUKSI DAN KUALITAS BUNGA KRISAN (CRHYSANTEMUM) Suputra, I Made Wirawan; S.Wijaya, I Made Anom; Tika, I Wayan
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 3 No 2 (2015): Agustus
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Tujuan dari penelitian ini adalah untuk (1) menentukan produksi dan kualitas krisan pada frekuensi (jumlah paparan per hari) dan durasi paparan medan elektromagnetik selama fase generatif, (2) menentukan frekuensi dan durasi paparan medan elektromagnetik yang menghasilkan produksi terbaik dan kualitas bunga krisan. Metode penelitian ini adalah metode eksperimen dengan dua perlakuan. Perlakuan pertama adalah frekuensi paparan medan elektromagnetik yang terdiri dari 1, 2 dan 3 kali per hari dan perlakuan kedua adalah durasi paparan medan elektromagnetik yang terdiri dari 5, 20, dan 35 menit. Variabel yang diukur untuk produksi bunga adalah umur tanaman mulai mekar, umur panen, jumlah bunga dan jumlah bunga setengah mekar, sedangkan untuk kualitas adalah diameter bunga, warna bunga, bobot bunga, dan ketahanan bunga setelah panen. Hasil penelitian menunjukkan bahwa produksi dan kualitas krisan rendah, jika paparan medan elektromagnetik pada 3 mT (militesla) dengan paparan frekuensi 1, 2 dan 3 kali per hari dan paparan durasi adalah 5, 20, dan 35 menit dalam fase generatif. Perlakuan terbaik yang terkandung dalam frekuensi 2 kali sehari dan durasi paparan 5 menit memberikan hasil terbaik untuk produksi dan kualitas bunga krisan. The objectives of this research were to (1) determine the production and quality of chrysanthemum on frequency (amount of exposure per day) and duration  of electromagnetic field exposure during generative phase, (2) determine frequency and duration of electromagnetic field exposure which produce the best production and quality of chrysanthemum flower. The method of this research was experimental method with two treatments.The first treatment was frequency of electromagnetic field exposure consisted of 1, 2 and 3 times per day and second treatment was electromagnetic field exposure duration consisted of 5, 20, and 35 minutes. Variables which measured for flower production were age of plant that started to blooming, harvest age, amount of flower and amount flower of half blooming, while for quality were diameter of flower, flower color, weight flower, and flower resistance after harvest. Result showed that production and quality of chrysanthemum was low, if electromagnetic field exposure at 3 mT (militesla) with frequency exposure 1, 2 and 3 times per days and duration exposure was 5, 20, and 35 minutes in generative phase. The best treatment contained in frequency 2 time per day and exposure duration 5 minutes gave the best result for production and quality of chrysanthemum flower.
ANALISIS RASIO PRESTASI MANAJEMEN IRIGASI PADA DISTRIBUSI AIR DI SUBAK KABUPATEN TABANAN Arnanda, Yuda; Tika, I Wayan; Madrini, Ida Ayu Bintang
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): inpress
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Sistem subak adalah merupakan salah satu bentuk sistem irigasi yang mampu mengakomodasikan dinamika sistem sosio-teknis masyarakat setempat. Air irigasi dikelola dengan prinsip-prinsip keadilan, keterbukaan, harmoni dan kebersamaan, melalui suatu organisasi yang fleksibel yang sesuai dengan kepentingan masyarakat. Sistem irigasi erat kaitannya tentang pendistribusian air irigasi pada subak yang berdasarkan luas lahan. Salah satu aspek yang akan dinilai dalam sistem irigasi adalah Rasio Prestasi Manajemen (RPM) irigasi Tujuan penelitian ini adalah untuk mengetahui klasifikasi RPM di suatu subak dengan pemberian skor pada masing-masing klasifikasi RPM. Perolehan data sekunder dilakukan dengan metode survey, pengamatan secara langsung dan pengukuran. Data yang telah dikumpulkan selanjutnya akan dianalisis menggunakan metode Rasio Prestasi Manajemen (RPM) Irigasi. RPM irigasi setiap subak dinilai dengan menggunakan empat rentang nilai yaitu Baik bila 0.75 < RPM <1.25, Cukup bila 0.60 < RPM < 0.75 atau 1.25 < RPM < 1.40, Kurang 0.40 < RPM< 0.60 atau 1.40 <RPM<1.60 dan Sangat kurang bila RPM < 0.40 atau RPM >1.60 Hasil metode analisis rasio prestasi manajemen irigasi pada distribusi air di subak diperoleh RPM daerah hulu yaitu Pama Palian, Aya I dan Aya II memiliki RPM yang Baik yaitu rata-rata 100%. Ketersediaan air yang begitu melimpah karena subak daerah hulu, subak yang pertama kali mengambil air di daerah irigasi. Dan yang paling penting adalah sistim pengaturan pemberian air yang sudah optimal. Untuk subak daerah tengah RPM sedikit berbeda dengan di daerah hulu. Rata-rata RPM daerah irigasi tengah yang mempunyai kreteria Cukup yaitu sebesar 15,5% sedangkan Baik 84,5%. Untuk daerah irigasi tengah yang memiliki kriteria RPM cukup dengan nilai 15,5% disebabkan oleh pendistribusian air tidak seoptimal seperti daerah irigasi hulu. Untuk Subak daerah irigasi hilir rata-rata RPM secara keseluruhan yaitu 100% baik, ini disebabkan karena pembagian pendistribusian air daerah irigasi hilir sudah optimal sesuai dengan luas lahan.   Subak system is one form of irrigation system that is able to accommodate the dynamics of the socio-technical system of the local community. Irrigation water is managed with the principles of justice, openness, harmony and togetherness, through a flexible organization that is in accordance with the interests of the community. Irrigation systems are closely related to the distribution of irrigation water in subaks based on land area. One aspect that will be assessed in an irrigation system is the Irrigation Management Achievement Ratio (RPM). The purpose of this study is to determine the RPM classification in a subak by scoring in each RPM classification. Secondary data acquisition is done by survey method, direct observation and measurement. The collected data will then be analyzed using the Irrigation Management Achievement Ratio (RPM) method. Irrigation RPM for each subak is assessed using four ranges of values, namely Good if 0.75 <RPM <1.25, Enough if 0.60 <RPM <0.75 or 1.25 <RPM <1.40, Less 0.40 <RPM <0.60 or 1.40 <RPM <1.60 and Very less if RPM <0.40 or RPM> 1.60 The results of the analysis method of irrigation management achievement ratio in the distribution of water in the subak obtained by the upstream area RPM namely Pama Palian, Aya I and Aya II have a good RPM that is an average of 100%. The availability of water is so abundant due to the upstream subak, the first subak to take water in an irrigation area. And the most important thing is the optimal water supply management system. For the subak area the RPM is slightly different from the upstream area. The average RPM of the central irrigation area that has sufficient criteria is 15.5% while 84.5% is good. For the central irrigation area which has sufficient RPM criteria with a value of 15.5% caused by the distribution of water is not as optimal as the upstream irrigation area. For Subak downstream irrigation areas the overall average RPM is 100% good, this is because the distribution of downstream irrigation water distribution is optimal according to the area of ??land.
DESAIN BANGUNAN BAGI NUMBAK DAN NGERIRUN PADA SISTEM DISTRIBUSI AIR IRIGASI SUBAK BERDASARKAN KONSEP PEMIAS Sumiasih, Ni Kadek; Tika, i Wayan; Budisanjaya, Putu Gede
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 4 No 2 (2016): September
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

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Abstract

Divider structure (tembuku) numbak and ngerirun is one of structure that used as divider in Subak water irrigation. Diversion of flow in the tembuku ngerirun was causing reduction that influenced by the difference speed and makes the difference rate of flow with tembuku numbak. The purposes of this research were: (1) to determine the level of the pemias coefficient on tembuku numbak and ngerirun, and (2) to calculate the dimensions of the tembuku numbak and ngerirun that review by pemias aspects. The real rate of flow analysed by measuring the width and height of water on the tembuku and the must rate of flow calculated by using the ratio of irrigated land area. The real rate of flow and the must rate of flow were used to determine pemias coefficients and pemias coefficients used to determine the must width of the threshold design of tembuku. Based on analysis, the average pemias coefficient was 0.095 or a value of pemias reduction was 0.095. Correlation of height of water and pemias coefficient was very high with R2 was 0.942. RMSE of width threshold value was 38.86%. The must width of the threshold at Subak is obtained by dividing the real width threshold with (1- pemias coefficients). After socialized to some pekaseh, they were mostly agree if there pemias coefficients that can be used to give pelampias on tembuku ngerirun.