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Analisis Status Daya Dukung Air di Sub DAS Cikeruh, Jawa Barat Berdasarkan Neraca Air Meteorologis Thornthwaite-Mather Rizky Ayu Aalimah; Edy Suryadi; Sophia Dwiratna Nur Perwitasari
Jurnal Agritechno Jurnal Agritechno, Vol. 15, Number 1, April 2022
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/at.v15i1.505

Abstract

The results of population growth, regional development, and the rising infrastructure development are indirectly or directly linked to the cause of a decline in environmental carrying capacity, especially the unavoidable water resource carrying capacity. This research aims to analyze the current condition of water resource carrying capacity based on the Thornthwaite-Mather meteorological water balance model. The research is done in Cikeruh Sub-Watershed, Citarum Upstream Watershed with a total area of 19.143,21 ha, The research methods used are descriptive research with a quantitative approach, by analyzing the current condition of water resource carrying capacity that refers to the water resource capacity and the and the water resources needed for the domestic, non-domestic, agricultural, industrial, livestock and fishery sectors. The results of the research have shown an overshoot of water resource carrying capacity in 2020 within the research area. Those condition has shown that the water balance is in a deficit condition given that the water availability index has reached up to 193.583.337,01 m3/year and the water demand for those 6 sectors has reached up to 462.306.728,53 m3/year. Based on the result, in terms of quantity, the water availability index in the research area is still inadequate to fulfill the demand of those six sectors. Based on the analysis, the availability of water resources in Cikeruh Sub-Watershed is only adequate to fulfill the demands of water for domestic, non-domestic, livestock, fishery sectors, and agricultural sectors but are still inadequate for industrial.
OPTIMASI PROSES PENGERINGAN TERHADAP AKTIVITAS ANTIOKSIDAN BUNGA TELANG (Clitoria ternatea) MENGGUNAKAN METODE RESPON PERMUKAAN Rizal Anwar Fauzi; Asri Widyasanti; Sophia Dwiratna Nur Perwitasari; Siti Nurhasanah
Jurnal Teknologi Pertanian Vol. 23 No. 1 (2022)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.459 KB) | DOI: 10.21776/ub.jtp.2022.023.01.2

Abstract

          Bunga telang (C. ternatea) diidentifikasi mengandung senyawa bioaktif yang berpotensi menjadi sumber antioksidan alami namun mudah terdegradasi oleh suhu tinggi. Tujuan penelitian ini yaitu mengetahui model matematis dan kombinasi suhu dan waktu pengeringan yang menghasilkan bunga telang kering dengan kadar air, rendemen dan aktivitas antioksidan paling optimum. Pengering yang digunakan yaitu food dehydrator dengan suhu 45 °C hingga 65 °C serta waktu 4 hingga 6 jam. Metode penelitian ini yaitu metode eksperimen dengan optimasi menggunakan Response Surface Methodology tipe CCD pada aplikasi Design Expert 11. Parameter yang dianalisis selain respon pada RSM yaitu kelarutan bubuk dan warna seduhan bunga telang kering. Kondisi pengeringan optimum yang diberikan RSM diperoleh pada pengeringan dengan suhu 64,46 °C selama 5,95 jam. Diperoleh nilai hasil dari validasi aktivitas antioksidan 159,75 ppm (kategori sedang), kadar air 4,33%, kelarutan 63,09%, rendemen 8,44%, L* 41,39, a* -24,18, b* -18,39, kromatisitas warna 30,23, dan Hue 216,88 (Blue green). Persamaan matematis aktivitas antioksidan didapatkan Y = 2630,202 – 62,236 A – 140,078 B – 4,171 AB + 0,707 A2 + 28,864 B2, dengan Y adalah aktivitas antioksidan (ppm), A adalah suhu (°C), dan B adalah waktu (jam). Penelitian ini membuktikan bahwa kombinasi suhu dan waktu pengeringan berpengaruh pada aktivitas antioksidan bunga telang kering.                                    Butterfly pea (C.ternatea) was identified to contain bioactive compounds that have the potential as a source of natural antioxidants but are easily degraded by high temperatures. The purpose of this research was to determine the mathematical model and combination temperature and dry time produces C.ternatea dry with the most optimum moisture content, yield and antioxidant activity. The dryer used was a food dehydrator with a temperature of 45 °C to 65 °C and a time of 4 to 6 hours. This research method was experimental research with optimization using Response Surface Methodology type CCD on Design Expert 11. Parameters analyzed in addition to the response in RSM were powder solubility and steeping color of dried C.ternatea. The most optimum dry conditions were given RSM obtained at a temperature of 64,46 °C for 5,95 hours. The results obtained from the validation of antioxidant activity 159.75 ppm (medium category), water content 4.33%, solubility 63,09%, yield 8,44%, L* 41,39, a* -24,18, b* -18,39, chroma 30,23, and Hue 216,88 (Blue-green). The mathematical equations for antioxidant activity was Y = 2630,202 – 62,236 A – 140,078 B – 4,171 AB + 0,707 A2 + 28,864 B2, Y: antioxidant activity (ppm), A: temperature (°C), and B: time (hours). This study proved that the combination of temperature and time affects the antioxidant activity of dried C.ternatea.  
THE IMPACT OF PLANTING SPACING ON THE GROWTH AND YIELD OF GREEN BUTTERHEAD LETTUCE (Lectuca sativa var. capitata L.) IN SWU 02 SMART WATERING HYDROPONIC SYSTEM. Dwi Rahayu Purbasari; Nurpilihan Bafdal; Sophia Dwiratna Nur Perwitasari
J-PEN Borneo : Jurnal Ilmu Pertanian Vol 6, No 1 (2023)
Publisher : FAKULTAS PERTANIAN UNIVERSITAS BORNEO TARAKAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/jpen.v6i1.3448

Abstract

The growth of the human population has resulted in the conversion of agricultural land into residential areas, and one potential solution to this issue is utilizing hydroponic technology for agriculture. The Smart Watering SWU02 hydroponic system is one type of hydroponic technology that can be employed for this purpose. Proper spacing plays a crucial role in hydroponics because it can impact plant growth and development. Therefore, the objective of this study was to examine the impact of spacing on the growth and yield of green butterhead lettuce (Lectuca sativa var. capitata L.). A completely randomized design (CRD) with three treatments, consisting of 12.5 x 12.5 cm, 20x20cm, and 25 x 25 cm spacing, each replicated three times, was used in this study. The results demonstrated that plant spacing significantly affected plant growth and yield. Planting lettuce with a spacing of 25 x 25 cm resulted in the best outcomes and had a significant impact on plant growth and yield compared to other spacing options, with a plant height growth of 18.33 cm, a plant width of 31.17 cm, a yield of plant weight of 122.78 grams, and a distance between leaves of 0.03 cm. Optimal plant growth and avoiding etiolation symptoms can be achieved by spacing plants apart, which minimizes competition for nutrients.Keywords: Green Butterhead Lettuce., Hydroponics, Planting Spacing, Plant Yield