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

Park, Minwon; Kim, Jin-Won; Lim, Soo-Hyun; Lee, In-Yong; Kim, Do-Soon

doi:10.5660/kjws.2010.30.2.103

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Many studies have focused on the potential effects of climate change on rice production (Bachelet and Gay, 1993 ; Kim et al, 1996 ; Matsui et al, 1997 ; Matthews et al, 1997 ; Sheehy et al, 2006a ; Mahajan et al, 2012 ; Nguyen et al, 2014 ) and paddy weed adaptation (Kim et al, 2010 ; Park et al, 2010 ; Rodenburg et al, 2011 ; Bir et al, 2014 ; Ramesh et al, 2017 ), but, relatively, few studies have examined the impacts of climate change on weed-rice competition. Previous studies reported the effects of elevated CO 2 concentrations on the competitive interactions between weeds and rice (Alberto et al, 1996 ; Ziska et al, 2010 ; Zeng et al, 2011 ) and the effects of elevated CO 2 or air temperature on the interactions between weeds and other crops, including soybeans (Flint and Patterson, 1983 ; Patterson et al, 1984 ; Ziska, 2000 , 2001 ; Davis and Ainsworth, 2012 ), wheat (Thompson and Woodward, 1994 ), cotton (Flint et al, 1983 ), and sorghum (Ziska, 2003 ).…”

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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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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“…, 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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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 Monochoria vaginalis and Scirpus juncoides under Elevated Temperature

Cited by 2 publications

References 8 publications

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

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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