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All Journal Jurnal BETA (Biosistem dan Teknik Pertanian)
Sumiyati Sumiyati
Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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ANALISIS NERACA AIR IRIGASI UNTUK TANAMAN PADI PADA SUBAK JAKA SEBAGAI SUBAK NATAK TIYIS I Putu Riadi Handika; Sumiyati Sumiyati; I Made Anom. S. Wijaya
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 3 No 2 (2015): September
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/j.beta.2015.v03.i02.p03

Abstract

Water source of Subak Natak Tiyis irrigation system comes from the upstream of subak drainage water. Those condition was causing uncertainly irrigation water balance in Subak Natak Tiyis, thus it requires further research to determine appropriate irrigation water balance according to the availabilitiy and requirement of irrigation water in Subak Natak Tiyis. The purposes of this research were to analyze the availabilities and requirement of irrigation water of Subak Jaka as Subak Natak Tiyis and determine the water balance irrigation in the Subak Jaka as Subak Natak Tiyis. The analysis of discharge availabilities was carried out by measuring discharge at inlet Subak Jaka. Irrigation water requirement was analyzed using CROPWAT 8.0 software. irrigation water balance was obtained by comparing the discharge of irrigation water was availabilitis and irrigation water requirement so get irrigation water deficit on Subak Jaka. The analysis of discharge availabilities showed high discharge occur at rainy season that was 115.72 liter/second within a year. The smallest discharge occurs in dry season that was 19.01 liter/second within a year. Irrigation water requirement in MT I and MT II average required discharge ranged from 11.0 to 98.5 liter/second for 15 days. The result of irrigation water balance the Subak Jaka occurrence irrigation water deficit three period that was 35.2 liter/second on period June I that highest for 15 days, 16.8 liter/second on period June II and 30.7 liter/second on January I that highest for 15 days.
Model Sistem Dinamik Stok Beras untuk Mendukung Ketahanan Pangan Provinsi Bali I Gede Yudi Pradnyana; I Wayan Widia; Sumiyati Sumiyati
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 9 No 1 (2021): April
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2021.v09.i01.p02

Abstract

Limited rice production capacity and increased rice consumption make food insecurity conditions in terms of insufficient rice stocks inevitable. The complexity of rice problems in Bali is not only related to fulfillment for local people but also for tourists. This study aims to analyze the dynamics of the causal-loop relationship of variables that affect the state of production, consumption, and rice stock in the Bali Province using a systems approach and the application of dynamic system modeling techniques. In this study the Causal-Loop Diagram (CLD) of the rice stock system is formulated on the basis of the interrelationship of the production sub-system, the consumption sub-system and the government rice reserve sub-system which involves the relationship of 24 variables to produce a model output that is the projected rice stock in Bali for the period of 2021-2030. Validation of the simulation results against the actual data in the model using the RMSPE method shows a value of 4,7062 percent (<5 percent), this means that the model is said to be very valid. Model simulation results based on existing conditions (scenario 0), show that rice stocks begin to decline since 2018 with an average decline rate of 19,76 percent/year. The rice stock deficit begin in 2026 at 36.458 tons and continue in 2030 at 448.162 tons. This condition can be overcome if the provincial government of Bali implements an effective policy with a policy option that is to increase productivity of rice yields with a minimum target of 6,7148 ton/hectare (scenario 1 optimistic) and or an increase in cropping intensity with a minimum target of 2,0622 (scenario 3 optimistic).
PENGARUH TINGKAT PEMBERIAN KOMPOS TERHADAP KEBUTUHAN AIR TANAMAN BEBERAPA JENIS KACANG Frans Azarya Simanjuntak; I Wayan Tika; Sumiyati Sumiyati
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 1 No 2 (2013): Agustus
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/j.beta.2013.v01.i02.p04

Abstract

The aim of this research is to understand the effect of provision rates of dosage compost in crop water requirements for several types of beans. There are seven levels of soil and compost ratio, there are: soil 100%, 97.5% soil: 2.5% compost, 95% soil: 5% compost; 92.5% soil: 7.5%. compost 90% soil: 10 % compost; 87.5% soil: 12.5% compost and 85% soil: 15% compost. The research was analyzed descriptively. Parameters observed in this research were the field capacity, permanent wilting point, availability of water, crop water requirements. The result of this research indicate that the provision rates of compost in several types of beans affected the water availability. For cowpea ranged from 34,4% - 42,7%, soybeans ranged from 42,3% - 48,6%, green beans ranged from46,7% – 55,7%. Crop water requirements varied depend on the type of the beans. The ratio of soil and compost 85%:15% for cowpea cultivation soybean and green beans is the best in resulting low crop water requirement.
KAJIAN JARAK LEGOWO TERHADAP IKLIM MIKRO PADA BUDIDAYA PADI SISTEMJAJAR LEGOWO I Putu Hendra; Sumiyati Sumiyati; I Wayan Tika
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 2 No 1 (2014): April
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2014.v02.i01.p01

Abstract

This study was conducted to determine the legowo distance studies in rice farming systems legowo row. This study is also expected to get the optimal distance legowo on legowo row planting system to improve the productivity of rice in Subak system. This research is divided into 5 treatment, the treatment in accordance with local farmers distance of 28 cm ; legowo 6:1 with wide legowo 1.25 x 28 cm ; legowo 6:1 with wide legowo 1.50 x 28 cm ; legowo 6:1 with wide legowo 1.75 x 28 cm ; legowo 6:1 with wide legowo 2 x 28 cm. This study was repeated 3 times. Parameters observed in this study ware : microclimate include: ambient temperature (T) , relative humidity (RH ), solar intensity (I). The production of a broad unity. In addition, the observed range of roots. The results suggest the application of legowo 6:1 cropping systems with a wide range legewo difference in each treatment shown to affect the relative humidity (RH), solar radiation, and air temperature. The results were obtained with a wide range of treatment legowo 1.75 x 28 cm is the best treatment with the highest yield among other treatment that is equal to 7.41 ton / ha.
PENGARUH TEKNIK BUDIDAYA SRI (System of Rice Intensification) DAN LEGOWO TERHADAP IKLIM MIKRO DAN PRODUKTIVITAS PADI KETAN I Putu Sanjaya; I Wayan Tika; Sumiyati Sumiyati
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 2 No 1 (2014): April
Publisher : Program Studi Teknik Pertanian dan Biosistem, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2014.v02.i01.p02

Abstract

This study was conducted to determine the effect of planting System of Rice Intensification (SRI) and legowo 6:1 row planting system of the microclimate and the rice plants productivity. This study was divided into 4 treatments with 3 replications, ie treatments conventional techniques, SRI method of planting, application of legowo 6:1 row planting system, and combination of SRI planting method and legowo 6:1 row planting system. The results showed the application of SRI planting method and legowo 6:1 row planting system not affecting the microclimate conditions, but affecting the productivity of rice plants. The results also showed that treatment K3 applying SRI methods combined with legowo 6:1 row planting system is the best treatment compared with other treatments.
Co-Authors Frans Azarya Simanjuntak I Gede Yudi Pradnyana I Made Anom. S. Wijaya I Putu Hendra I Putu Riadi Handika I Putu Sanjaya I Wayan Tika I Wayan Widia