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All Journal Jurnal BETA (Biosistem dan Teknik Pertanian)
Ni Nyoman Sulastri
Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Institut Pertanian Stiper Yogyakarta, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Optimasi Suhu Pengeringan dan Ketebalan Irisan pada Proses Pengeringan Temulawak (Curcuma xanthorrhiza Roxb) dengan Response Surface Methodology (RSM) I Wayan Suryanantha; Ni Luh Yulianti; Ni Nyoman Sulastri
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 10 No 2 (2022): 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/JBETA.2022.v10.i02.p08

Abstract

Two main things that influence the drying process of Curcuma; are drying temperature and thickness of slices. This research was conducted to obtain the optimum combination of drying temperature and slice thickness and determine the mathematical model to predict water activity, moisture content, ash content, and Q value through Response Surface Methodology (RSM). The data were processed using the Design Expert ® 12 software. Based on the testing and analysis, the results generated linear and quadratic models on the observed responses. The linear model was generated on water and ash content, while the quadratic model was generated on water activity and Q values. The drying temperature was 65.867 ̊C, and the slice thickness of 3 mm was the chosen optimumcombination. The verification test results show that the actual value of water activity is 0.218 aw, water content is 9.974%, ash content is 3.316%, and Q value is 31.950 kJ/h. The desirability value of the combination of drying temperature and optimum slice thickness of 0.898indicates that 89.8% of the expected response criteria can be achieved.
Kajian KemampuanMediaTanamPenyimpanAir dan Produktivitas Tanaman pada Budidaya Kentang (Solanum tuberosum L.) I Made Nanda Suastika; Yohanes Setiyo; Ni Nyoman Sulastri
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 10 No 2 (2022): 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/JBETA.2022.v10.i02.p09

Abstract

Since farmers plant potatoes in the dry season, water becomesthe main component for plants to grow well. This study aims to determine the ability of planting media to bind nutrients and the proportion of types of planting media that produce the best water holding capacity (WHC) for potato cultivation productivity. Parameters observed in this study include porosity, plant water availability (KAT), bound water volume (VAT), electrical conductivity (EC), potato productivity. This study used a completely randomized design with 8 levels of composition, 100% chicken manure compost (P1), 100% soil (P2), 100% husk charcoal (P3), 50% soil + 40% chicken manure compost + 10% husk charcoal ( P4), 50% soil + 30% chicken manure compost + 20% husk charcoal (P5), 50% soil + 20% chicken manure compost + 30% husk charcoal (P6), 50% soil + 10% chicken manure compost + charcoal husk 40% (P7), 50% soil + 25% chicken manure compost + 25% husk charcoal (P8). Rice husk charcoal planting medium 100% (P3) produces porosity, water availability for plants and the highest volume of bound water, with a porosity value of 55.71%, a value of water availability for plants 17.22% wb, and a volume value of bound water 1.603 ml..Treatment of 100% soil media (P2) resulted in the ability of the planting medium to bind the highest nutrients with a value of 788.67 S/cm. The proportion of soil 50% chicken manure compost 10% husk charcoal 40% produced the highest productivity of potatocultivation, namely 571.70 g/plant.
Co-Authors I Made Nanda Suastika I Wayan Suryanantha Ni Luh Yulianti Yohanes Setiyo