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한국자원식물학회 / v.11, no.2, 1998년, pp.119-123 
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수도의 질소반응에 미치는 고$CO_2$농도 및 온도의 영향
( Effect of Elevated TEX>$CO_2$ and Temperature on Nitrogen Responses in Rice ) |
| 김한용; 과학기술진흥사업단;
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| 초 록 |
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| Effects of elevated CO2 and temperature on nitrogen (N) uptake , leaf N concentration, N partitioning , N use efficiency (NUE) and grain yield of pot and field grown rice (Oryza sativa. L.cv. Chukwangbyeo) under canopy-like conditions were studied over three years. Rice plants were grown in pots and in the field in temperature gradient chambers containing either ambient(350ppm) or elevated CO2 concentrations (690 or 650ppm) in conbination with either four or seven temperature regimes ranging form ambient temperature(AT) to AT plus 3$^{circ}C$. There were three N supplies 94g or 6g m-2 to 20g or 48g m-2.Elevated CO2 increased N uptake in field-grown rice ; the magnitude of this effect was thelargest (+15%) at the highest N level. However, in pot-grown rice, N uptake was suppressed with the effect was the largest at high N levels. Leaf N concentration declined at elevated CO2 mainly due to a decrease in N partitiioning to the leaf blades. Air temperature had little effect on the N parameters mentioned previously, wherease NUE for spikelet production declined rapidly with increased temperature irrespective of CO2 concentration. The response of the biomass to elevated CO2 varied with N level, with the greatest response at 20g N m-2 (+30%) . At AT, where high temperature-induced sterility was generally not observed, elevated CO2 increased yield. However, the magnitude of this effect varied greatly (2-39%) with N level, and was mainly dependent on the magnitude of the increase in spikelet number. |
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| 키워드 |
| elevated TEX>$CO_2$;nitrogen;rice;temperature; |
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한국자원식물학회지 / v.11, no.2, 1998년, pp.119-123
한국자원식물학회
ISSN : 1226-3591
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920279900)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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