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http://dx.doi.org/10.5660/KJWS.2010.30.2.103

Prediction of Seedling Emergence and Early Growth of Monochoria vaginalis and Scirpus juncoides under Elevated Temperature  

Park, Min-Won (Department of Plant Science, Seoul National University)
Kim, Jin-Won (Department of Plant Science, Seoul National University)
Lim, Soo-Hyun (Department of Plant Science, Seoul National University)
Lee, In-Yong (National Academy of Agricultural Science, RDA)
Kim, Do-Soon (Department of Plant Science, Seoul National University)
Publication Information
Korean Journal of Weed Science / v.30, no.2, 2010 , pp. 103-110 More about this Journal
Abstract
This experiment was conducted to investigate seedling emergence and early growth of Monochoria vaginalis and Scirpus juncoides in the controlled-environment chamber maintained at different temperatures. Non-linear regression analyses of observed data against effective accumulated temperature (EAT) with the Gompertz and logistic models showed that the Gompertz and logistic models worked well in describing seedling emergence and early growth of both weed species, respectively, regardless of temperature. EATs required for 50% of the maximum seedling emergence and the maximum leaf number of M. vaginalis were estimated to be 69.3 and $131^{\circ}C$, respectively, while those of S. juncoides were 94.8 and $137^{\circ}C$, respectively. Models developed in this study thus were used to predict seedling emergence and early growth under elevated temperature condition. If rotary tillage with water is made on 27 May under $+3^{\circ}C$ elevated temperature condition, dates for 50% of the maximum seedling emergence and 4 leaf stage were predicted to be 1 June and 15 June for M. vaginalis and 3 June and 14 June for S. juncoides, respectively. As compared with current temperature, these dates are 1-2 days earlier for the seedling emergence and 3 days earlier for the early growth, suggesting that earlier application of herbicides is required for effective control of M. vaginalis and S. juncoides under elevated temperature condition in the future.
Keywords
early growth; elevated temperature; EAT; modelling; Monochoria vaginalis; Scirpus juncoides; seedling emergence;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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