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Journal : Jurnal Agritechno

Analisis Kinetika Perubahan Kualitas Fisik Terung Ungu (Solanum Melongena L.) Selama Penyimpanan Hanis Adila Lestari; Amas Agung Pandu Prabowo; Christian Soolany
Jurnal Agritechno Jurnal Agritechno, Vol. 13, Number 2, Oktober 2020
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/at.v13i2.339

Abstract

Eggplant is one of fruit much like by many people. Postharvest handling of eggplant could reduce losses due to short shelf life. One of the method to extend the shelf life of eggplant was stored at low temperature and soaked into solution of calcium cloride. The purpose of this research was to study kinetics eggplant quality during storage. Treatment to research was eggplant soaked in solution of calsium clorida (CaCl2) with concentration 0%, 1% and 2% then stored at 28°C and low temperature (9°C). Rate of quality is analyzed using kinetic equation. The kinetics of weight losses use zero-order, first-order was for hardness change and total dissolved solids. The research result showed that soaked into solution of calcium chloride (CaCl2) was capable of inhibiting the rate of change the quality of eggplant.
ANALISIS PENGARUH SUHU DAN KONSENTRASI LARUTAN CaCl2 TERHADAP KUALITAS FISIK TERUNG UNGU (Solanum melongena L.) SELAMA PENYIMPANAN Lestari, Hanis Adila; Prabowo, Amas Agung Pandu; Soolany, Christian; Kurniawan, Anri
Jurnal Agritechno Jurnal Agritechno Vol. 18, Nomor 1, April 2025
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70124/at.vi.1340

Abstract

Purple eggplant (Solanum melongena L.) is a type of plant known as a vegetable that is used as a food ingredient. After purple eggplants are harvested, they still carry out metabolic processes such as respiration and transpiration. Inhibition of respiration in agricultural products can be done by cold air storage combined with dipped in CaCl2 as a pretreatment. The purpose of this study is to determine how the physical characteristics of purple eggplant are affected by temperature and CaCl2 solution concentration. The method used was a Completely Randomized Design (CRD) with two factors. The first factor is storage temperature, which consists of 9 °C and room temperature. The second factor is the CaCl2 concentration, consisting of 0%, 1%, and 2%. The parameters observed during storage were weight loss, texture, and total dissolved solids. This research was carried out for 4 days of storage and measured every day with 3 replication. The results show that dipping purple eggplant in CaCl2 and cold storage can inhibit the respiration and transpiration processes. The best treatment is to dip it in 2% CaCl2 and store it in the refrigerator.
Pengisian Air Dan Nutrisi Otomatis Pada Reservoir Hidroponik Kratky Untuk Budidaya Pakcoy (Brassica Rapa Subsp Chinensis): PENGISIAN AIR DAN NUTRISI OTOMATIS PADA RESERVOIR HIDROPONIK KRATKY UNTUK BUDIDAYA PAKCOY (Brassica rapa subsp chinensis) Kurniawan, Anri; Fatih, Hanif Nur; Lestari, Hanis Adila
Jurnal Agritechno Jurnal Agritechno Vol. 18, Nomor 2, Oktober 2025
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The automated water and nutrient filling system in the Kratky hydroponic method for pak choi (Brassica rapa subsp. chinensis) is designed to control the reservoir’s water level and nutrient concentration. An ultrasonic sensor measures the water surface height, while a TDS sensor monitors nutrient concentration. Both sensors are controlled by an Arduino Uno microcontroller, which manages the operation of the water and nutrient pumps. This study aimed to design and test the automated filling system. The research involved tool development, system testing, and data analysis through calibration using percentage error and Root Mean Square Error (RMSE) to evaluate the pump’s performance. The results showed that the system functioned optimally: the water pump was activated when the water level ranged between 30 and 40 cm, and the nutrient pump operated when the ppm value fell below 600. The ultrasonic sensor had an error of 0.76%, and the TDS sensor 0.60%, both under 1%, indicating high accuracy. At 30 days after transplanting, the pak choi plants had an average height of 15.05 cm and a leaf width of 14.98 cm. The water pump performance under the automated filling system had an RMSE value of 7.5498, indicating good reliability.