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http://dx.doi.org/10.5532/KJAFM.2017.19.3.102

Prediction of Silking Date of Corn Hybrids Using Beta Function Model in South Korea  

Shim, Kyo-Moon (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Kim, Yong-Seok (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Lee, Jin-Seok (Department of Central Area Crop Science, National Institute of Crop Science)
Jung, Myung-Pyo (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Choi, In-tae (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Kim, Hojung (Department of Agricultural Environment, National Institute of Agricultural Sciences)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.19, no.3, 2017 , pp. 102-109 More about this Journal
Abstract
A temperature-based Beta function model was developed for corn hybrids (Zea mays L.). The beta function based on the hourly temperature was fitted to the phenology data (silking date) obtained for six years from 2008 through 2013 at four survey sites. Using the Beta function model, silking dates for two corn hybrids with the different ecotype ('Danok3', 'Ilmichal') were estimated over two years from 2014 through 2015 at four sites, and then the performance of the model was evaluated based on the data for the same period. The silking dates estimated by the model were predicted earlier than those observed at survey sites. Still, the correlation between estimates and observation was relatively high (r=0.859). The accuracy of the model differed by the survey site and the year, which was likely due to the considerably large standard deviation of the parameter calibrated in this study.
Keywords
Beta function model; Corn; Phenology; Silking date;
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