Aplikasi Thermal Imaging untuk Estimasi Crop Water Stress Index pada Tanaman dalam Greenhouse

Shinta Wardani, Ir. Andri Prima Nugroho, S.T.P., M.Sc., Ph.D., IPM. ASEAN Eng.;Prof. Dr. Ir. Lilik Sutiarso, M.Eng., IPU.

2023 | Skripsi | TEKNIK PERTANIAN

Greenhouse merupakan salah satu teknologi yang dilengkapi dengan monitoring kondisi lingkungan untuk mengoptimalkan pertumbuhan. Monitoring kondisi lingkungan seperti adanya suhu lingkungan, kelembapan lingkungan, intensitas cahaya, dan kelembapan tanah. Perkembangan teknologi menciptakan sebuah alat seperti kamera thermal yang mampu mengetahui kondisi tanaman secara visual dan terukur. Kondisi tanaman ini termasuk dalam menentukan deficit air di dalam tubuh tanaman yaitu berbasis CWSI (Crop Water Stress Index). CWSI (Crop Water Stress Index) merupakan indeks stress tanaman yang dipengaruhi oleh ada dan tidaknya air di dalam tubuh tanaman dengan menyatakan suhu tanaman. Tujuan dari penelitian ini yaitu merancang sistem thermal imaging untuk pengamatan kondisi tanaman di dalam greenhouse dan mengevaluasinya kondisi tanaman dengan CWSI. Sistem thermal imaging dirancang agar dengan beberapa modul seperti monitoring suhu tanaman, monitoring kondisi lingkungan, dan monitoring pengambilan gambar thermal konsisten. Dilakukan uji validitas yaitu berupa uji regresi linier, RMSE (Root Mean Square Error), MAPE (Mean Absolute Percentage Error). Uji validitas sistem thermal imaging dengan tanaman diperoleh nilai R² sebesar 0,9807, RMSE sebesar 1,01, dan MAPE sebesar 3,80%. Implementasi sistem dilakukan di dalam greenhouse, tanaman dengan perlakuan yang diberi air sebanyak 300 mL(tanaman normal), 100 mL(tanaman stress medium), dan tanpa diberi air (tanaman stress maksimum). Suhu tanaman tertinggi sebesar 41,82? pada pukul 12.37 WIB hari ketujuh dan terendah sebesar 25,81? pada pukul 17.06 WIB hari keenam. Hasil analisis CWSI rerata selama tujuh hari pada tanaman normal, tanaman stress medium, dan tanaman stress maksimum masing-masing 0,315, 0,322, dan 0,397. Tanaman pakcoy yang menghasilkan nilai CWSI ?0,4 terindikasi bahwa tanaman tersebut perlu diberi irigasi. Tanamn stress maksimum menghasilkan nilai CWSI yang mendekati 0,4 yaitu sebesar 0,397, berarti bahwa tanaman stress maksimum perlu diberi irigasi.

 

Greenhouse is a one of the technologies equipped with monitoring environmental conditions to optimize growth. Monitoring environmental conditions includes factors such as temperature, humidity, light intensity, and soil moisture. The development of technology has created tools, such as thermal cameras, that can visually and quantifiably determine the condition of plants. This plant condition is used to determine water deficit in the plant's body, specifically using the Crop Water Stress Index (CWSI). CWSI is an index that measures plant stress, which is influenced by the presence or absence of water in the plant's body, as indicated by the plant's temperature.The purpose of this research is to design a thermal imaging system for observing plant conditions in the greenhouse and evaluating plant conditions using CWSI. The thermal imaging system is designed with several modules, including monitoring plant temperature, monitoring environmental conditions, and consistently capturing thermal images. Validity tests are carried out, including linear regression tests, Root Mean Square Error (RMSE), and Mean Absolute Percentage Error (MAPE). The validity test of the thermal imaging system with plants resulted in an R2 value of 0.9807, an RMSE of 1.01, and a MAPE of 3.80%. Implementation of the system is carried out in the greenhouse, with plants given different treatments: 300 mL of water for normal plants, 100 mL for medium stress plants, and no water for maximum stress plants. The highest recorded plant temperature was 41.82°C at 12:37 pm on the seventh day, and the lowest was 25.81°C at 17:06 pm on the sixth day. The average CWSI analysis results for seven days in normal plants, medium stress plants, and maximum stress plants were 0.315, 0.322, and 0.397, respectively. Pakcoy plants that produce CWSI values ?0.4 indicate that the plants need to be irrigated. Maximum stress plants produce CWSI values close to 0.4, at 0.397, indicating that they need to be irrigated.

Kata Kunci : CWSI, sistem monitoring, thermal Imaging