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http://dx.doi.org/10.5532/KJAFM.2012.14.3.132

An Outlook on Cereal Grains Production in South Korea Based on Crop Growth Simulation under the RCP8.5 Climate Change Scenarios  

Kim, Dae-Jun (National Center for Agro-Meteolorogy, Seoul National University)
Kim, Soo-Ock (National Center for Agro-Meteolorogy, Seoul National University)
Moon, Kyung-Hwan (Agricultural Research Center for Climate Change, NIHHS, RDA)
Yun, Jin-I. (College of Life Science, Kyung Hee University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.14, no.3, 2012 , pp. 132-141 More about this Journal
Abstract
Climate change impact assessment of cereal crop production in South Korea was performed using land attributes and daily weather data at a farm scale as inputs to crop models. Farmlands in South Korea were grouped into 68 crop-simulation zone units (CZU) based on major mountains and rivers as well as existing land use information. Daily weather data at a 1-km grid spacing under the A1B- and RCP8.5 scenarios were generated stochastically to obtain decadal mean of daily data. These data were registered to the farmland grid cells and spatially averaged to represent climate conditions in each CZU. Monthly climate data for each decade in 2001~2100 were transformed to 30 sets of daily weather data for each CZU by using a stochastic weather generator. Soil data and crop management information for 68 CZU were used as inputs to the CERES-rice, CERE-barley and CROPGRO-soybean models calibrated to represent the genetic features of major domestic cultivars in South Korea. Results from the models suggested that the heading or flowering of rice, winter barley and soybean could be accelerated in the future. The grain-fill period of winter barley could be extended, resulting in much higher yield of winter barley in most CZUs than that of rice. Among the three major cereal grain crops in Korea, rice seems most vulnerable to negative impact of climate change, while little impact of climate change is expected on soybeans. Because a positive effect of climate change is projected for winter barley, policy in agricultural production should pay more attention to facilitate winter barley production as an adaptation strategy for the national food security.
Keywords
RCP 8.5; DSSAT; GIS; Rice; Winter barley; Soybean;
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Times Cited By KSCI : 5  (Citation Analysis)
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