The rice yield gap estimation using integrated system approaches: a case study—Guilan province, Iran

Today, food security is a major human concern. Therefore, research on crop yield and yield gap has been seriously increasing in recent years. For this purpose, the yield gap of rice fields in Guilan province was investigated using the ORYZA2000 model and integrated GIS-RS approaches. First, to estim...

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Published inInternational journal of environmental science and technology (Tehran) Vol. 19; no. 9; pp. 8451 - 8464
Main Authors Bazkiaee, P. A., Kamkar, B., Amiri, E., Kazemi, H., Rezaei, M., López-Bernal, A.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2022
Subjects
Aquatic Pollution
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Science and Engineering
Original Paper
Soil Science & Conservation
Waste Water Technology
Water Management
Water Pollution Control
Sentinel 2
Regional yield factor
Landsat 8
Potential yield
Vegetation indices
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Summary:Today, food security is a major human concern. Therefore, research on crop yield and yield gap has been seriously increasing in recent years. For this purpose, the yield gap of rice fields in Guilan province was investigated using the ORYZA2000 model and integrated GIS-RS approaches. First, to estimate the coefficients of the ORYZA2000 model, an experimental survey was performed in the Rice Research Institute of Iran in the 2016 and 2017 years. At first, with the help of the model, the potential yield of rice in Guilan province was predicted. SDVIs (Satellite imagery-derived vegetation indices) were extracted from Sentinel-2 and Landsat 8 satellite images. SDVIs were evaluated to select the most proper one for generating the actual yield raster. Finally, the map of the yield gap was prepared from the differences between potential yield and actual yield rasters. The result showed that the NRMSE in the simulation of grain yield and aboveground biomass was less than 8%. The yield gap in rice cultivated farms of Guilan province during the two years of the experiment was estimated to be between 37 and 3090 kg ha −1 . The results of this study can provide good basic information for optimizing rice yield.
ISSN:1735-1472
1735-2630
DOI:10.1007/s13762-022-04093-z