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http://dx.doi.org/10.5660/KJWS.2010.30.2.094

Prediction of Seedling Emergence and Early Growth of Eleocharis kuroguwai Ohwi under Evaluated Temperature  

Kim, Jin-Won (Department of Plant Science, Seoul National University)
Moon, Byeong-Chul (Department of Plant Science, Seoul National University)
Lim, Soo-Hyun (Department of Plant Science, Seoul National University)
Chung, Ji-Hoon (Department of Plant Science, Seoul National University)
Kim, Do-Soon (Department of Plant Science, Seoul National University)
Publication Information
Korean Journal of Weed Science / v.30, no.2, 2010 , pp. 94-102 More about this Journal
Abstract
Field and pot experiments were conducted to investigate seedling emergence and early growth of Eleocharis kuroguwai panted on different dates. Non-linear regression analyses of observed data against effective accumulated temperature (EAT) with the Gompertz model showed that the Gompertz model works well in describing seedling emergence and early growth of E. kuroguwai regardless of planting date and soil burial depth. EATs required for 50% of the maximum seedling emergence of E. kuroguwai planted at 1, 3 and 5 cm soil burial depth in the pot experiment were estimated to be 54.5, 84.0 and $118.0^{\circ}C$, respectively, and $56.7^{\circ}C$ when planted at 1 cm in the field experiment. EATs required for 50% of the maximum leaf number of E. kuroguwai planted at 1, 3 and 5 cm soil burial depth in the pot experiment were estimated to be 213.3, 249.0 and $291.6^{\circ}C$, respectively, and $239.5^{\circ}C$ when planted at 1 cm in the field experiment. Therefore, models developed in this study thus predicted that if rotary tillage with water is made on 27 May under $+2^{\circ}C$ elevated temperature condition, dates for 50% of the maximum seedling emergence, 5 leaf stage and 5 cm plant height of E. kuroguwai buried at 3 cm soil depth were predicted to be 2 June, 10 June and 12 June. These dates are 1 day earlier for the seedling emergence and 3 days earlier for the early growth as compared with current temperature condition, suggesting that earlier application of herbicides is required for effective control of E. kuroguwai.
Keywords
climate change; Eleocharis kuroguwai; growth prediction; modeling; seedling emergence;
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Times Cited By KSCI : 3  (Citation Analysis)
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