CO2 농도의 상승과 온난화환경이 수도의 생장, 물질생산 및 그 분배에 미치는 영향

• 영문명: Effects of Elevated CO2 and Global Warming on Growth Parameters, Biomass Production and Its Partitioning of Rice
• 발행기관: 한국자원식물학회
• 저자명: 김한용
• 간행물 정보: 『한국자원식물학회지』제11권 제1호, 80~85쪽, 전체 6쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1998.02.28

영문 초록

he influence of elevated CO2 and temperature on growth parameters, biomass production and its partitioning of rice (Oryza sativa L.cv. Chukwangbyeo) were investigated in the three experiments (1991-1993). Rice plants were grown from transplanting to harvest at either ambient(350ppm) or elevated CO2 concentrations (690 or 650ppm) in combination with either four or seven temperature regimes ranging form ambient temperature (AT) to AT plus 3∘C.From transplanting to panicle initiation, crop growth rate (CGR) was enhanced by up to 27% with elevated CO2 , primarily due to an an increase in leaf area index. although net assimilatiion rate was also greater at elevated CO2. The effect of elevated CO2 varied with temperature. During the reproductive phase, CGR declined linearly with increased temperature, and was greater at elevated CO2 . Elevated CO2 increased final crop biomass and panicle weight 30% respectively at AT(27.6∘C : 1991) . However, there was no significant effect of elevated CO2 on panicle weight at AT plus 3∘C, where severe spikelet sterility occurred. There was no significant effect of elevated CO2 on panicle weight at AT plus 3∘C, where severe spikelet sterility occurred. There was also no effect of CO2 on biomass pratitioning into vegetative and reproductive organs (harvest index)) at AT, although higher temperature could affect that by inducing spikelet sterility. These results suggest that elevated CO2 could enhance rice producivity througth promoted growth and biomass production , but its positive effects may be less at higher temperatures.

키워드

elevated CO2 growth parameters highr temperatures rice