Analysis of Rice Plant Age Based on NDVI Value Using MODIS Imagery (Case Study of Koto Tangah District, Padang City)

• Published in: IOP conference series. Earth and environmental science 2024-12, Vol.1426 (1), p.12018
• Main Authors: Safitri, Imelda, Yanti, Delvi, Irsyad, Fadli
• Format: Article
• Language: English
• Subjects: Age; Age determination; Chronology; Coastal zone; Environmental factors; Estimation; Image analysis; Image processing; Koto Tangah District; MODIS; NDVI; Plant layout; Remote sensing; Rice fields; Rice Plant Age; Satellite imagery
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1426/1/012018

Determining the growth phase of rice is an estimation technique that has been carried out universally using satellite images. However, an estimation model cannot applied in other areas due to different regional characteristics. Lowland areas have different environmental factors than highland areas. Padang City with the characteristics of a coastal area dan including the capital of West Sumatra Province has productive rice fields as one of the rice supplies in Padang City. This study aims to determine a model for estimating the growth phase of rice plants in Padang City using MODIS Imagery. The data used were MODIS image recordings from January 2021 to July 2024 with 60 image output data. Observation locations with grids or image pixels with rice field areas ≥ 50%. Based on the results of image analysis, a model was obtained for estimating the age of rice plants in Padang City, namely y = −0.000095x 2 + 0.013743x + 0.310743 with y being the NDVI value and x is the age of the rice plant with a coefficient of determination (R 2 ) value of 0.9554 in the forceful category and an RMSE value of 0.0383. The range of NDVI values for each phase of rice growth in Koto Tangah District, Padang City, is water phase < 0.5063; vegetative phase (1) 0.5063-0.7515; vegetative phase (2) 0.7515-0.8022; generative phase (1) 0.8022-0.7546; generative phase (2) 0.7546-0.5134 and fallow phase 0.5134-0.3198.