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

Kim, Jin-Won; Moon, Byeong Chul; Lim, Soo-Hyun; Chung, Jae‐Seung; Kim, Do-Soon

doi:10.5660/kjws.2010.30.2.094

Cited by 4 publications

(7 citation statements)

References 8 publications

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“…Recently, EATs for seedling emergence and early growth of E. kuroguwai was also estimated by using the Gompertz model and observed field data (Kim et al 2010). If such models using EAT can be developed, they can be utilized to predict seedling emergence and early growth under various temperature scenarios, so that timing for weed control can be advised appropriately.…”

Section: ) Eats For 2 Leaf Stage Of E Crus-galli Andmentioning

confidence: 99%

“…Although some studies dealt with weeds considering climate change (Moon et al 2004;Kim et al 2010), more works are required as there are so many weeds threatening crop production.…”

Section: Introductionmentioning

confidence: 99%

“…If we could expect a specific leaf stage of the target weed, we can make a right decision for herbicide application in advance (Kim et al 2010). Seedling emergence and early growth is affected by various factors complicatedly, but air temperature is most important factor (e.g.…”

Section: Introductionmentioning

confidence: 99%

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

Park¹,

Kim²,

Lim³

et al. 2010

Korean Journal of Weed Science

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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℃, respectively, while those of S. juncoides were 94.8 and 137℃, 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℃ 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.

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Section: ) Eats For 2 Leaf Stage Of E Crus-galli Andmentioning

confidence: 99%

“…Although some studies dealt with weeds considering climate change (Moon et al 2004;Kim et al 2010), more works are required as there are so many weeds threatening crop production.…”

Section: Introductionmentioning

confidence: 99%

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

Park¹,

Kim²,

Lim³

et al. 2010

Korean Journal of Weed Science

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“…Late watergrass is a representative C4 weed species that can adapt to some environmental changes in rice cultivation, showing various adaptive characteristics, such as an enhanced photosynthetic capacity under high temperature (Bouhache and Bayer, 1993 ), enhanced tolerance to salinity (Nguyen et al, 2005 ), and germination and seedling growth under anaerobic conditions (Kennedy et al, 1980 ; Nah et al, 2015 ). Water chestnut can also adapt to such environmental conditions, although it is a C3 weed species (Ueno and Takeda, 1992 ) that shows tuber propagation under submerged soil conditions (Kobayashi and Ueki, 1983 ; Chun and Shin, 1994 ) and fast growth and high biomass under elevated temperatures (Kim et al, 2010 ). If these weed species are not properly managed under future climate change, then they will become more competitive against rice, resulting in greater yield losses than under current climate conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Effects of Elevated Temperature and Weed Interference on Rice Grain Yield

Song

Park

et al. 2021

Front. Plant Sci.

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A 3-year phytotron study was conducted in Suwon (37.27°N, 126.99°E), Korea, to evaluate and model the effects of elevated temperature on rice-weed competition. The dry weight and the number of panicles in rice were the most susceptible components to weed interference during the early growth of rice, regardless of weed species, while other yield components, including the number of grains, % ripened grain, and 1000-grain weight, were more susceptible to elevated temperature. A rectangular hyperbolic model well demonstrated that rice grain yield was affected by weed interference under elevated temperature, showing that the competitiveness of late watergrass (Echinochloa oryzicola) and water chestnut (Eleocharis kuroguwai) increased under elevated temperature conditions. Quadratic and linear models well described the effects of elevated temperature on the weed-free rice grain yield and weed competitiveness values of the rectangular hyperbolic model for the two weed species, respectively. Thus, a combined rectangular hyperbolic model incorporated with the quadratic and linear models well demonstrated the effects of elevated temperature and weed interference on rice grain yield across years. Using the combined model and estimated parameters, the rice grain yields were estimated to be 58.9, 48.5, 41.3, and 35.9% of the yields under weed-free conditions for 80 plants m−2 of late watergrass and 86.8, 64.3, 51.1, and 42.3% of the yields under weed-free conditions for 80 plants m−2 of water chestnut at 1,300, 1,500, 1,700, and 1,900°C·days of accumulated growing degree days (GDD; from transplanting to flowering, 89 days), respectively. The combined model developed in this study can provide an empirical description of both the elevated temperature and weed interference effects on rice yield and can be used for predicting rice grain yields due to weed interference under future elevated temperature conditions.

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“…, Simard et al (2002), Pekrun et al (1997) (Kim et al, 2006;Kim et al, 2010;Park et al, 2010). -------------------------= Fig.…”

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confidence: 97%

Dormancy Associated Weedy Risk of the F1 Hybrid Resulted from Gene Flow from Oilseed Rape to Mustard

Lim¹,

Yook²,

Zhang³

et al. 2015

Weed & Turfgrass Science

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To assess the dormancy associated weedy risk of the F1 hybrid generated by hybridization between Brassica juncea (maternal) and Brassica napus (paternal), seed germination, dormancy and longevity were examined sequentially after seed harvest. The F1 hybrids exhibited the intermediate characteristics of their parents in seed germination and dormancy with relatively high dormancy rate of 41.1%. In summer, F1 hybrid seeds buried in the 3 cm soil exhibited greater viability (52.4%) than those in the soil surface with greater seed longevity (74.6%) than its maternal (63.3%) and paternal (33.7%) parents at 100 days of over-summering in soil. In winter, F1 seeds buried in the soil surface were more viable than those in the 3 cm soil with greater seed longevity (83.5%) than its maternal (39.0%) and paternal (71.7%) parents at 100 days of over-wintering in soil. Therefore, it is concluded that F1 hybrid resulted from gene flow from OSR to mustard has high seed dormancy and longevity during summer and winter, suggesting its weedy risk potential. Further studies are required to examine the reproductivity and fitness cost of F1 hybrid to make a clearer conclusion of its weedy risk.

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

Cited by 4 publications

References 8 publications

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

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

Modeling the Effects of Elevated Temperature and Weed Interference on Rice Grain Yield

Dormancy Associated Weedy Risk of the F1 Hybrid Resulted from Gene Flow from Oilseed Rape to Mustard

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