Comparison of 14C-radioactivity in rice-paddy soil exposed to atmospheric and elevated CO2 conditions after 14C-carbaryl treatment
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study was performed to investigate if elevated CO2 affects the residue pattern of 14C in the soil environment after 14C-carbaryl treatment. 14C-carbaryl was applied on the rice plant-grown greenhouse soil exposed to atmospheric and elevated CO2 conditions. 14C-radioactivity was measured in the rhizospheric soil and rice straw samples six months after 14C-carbaryl application. Significantly high radioactivity was observed in the soil exposed to atmospheric CO2 as compared to that in the soil exposed to elevated CO2. Background level of radioactivity was observed in rice plant samples. These observations suggest the possibility that elevated CO2 may affect residual radioactivity of 14C-carbaryl in the soil rather than that in the plant.
Abstract
This study was performed to investigate if elevated CO2 affects the residue pattern of 14C in the soil environment after 14C-carbaryl treatment. 14C-carbaryl was applied on the rice plant-grown greenhouse soil exposed to atmospheric and elevated CO2 conditions. 14C-radioactivity was measured in the rhizospheric soil and rice straw samples six months after 14C-carbaryl application. Significantly high radioactivity was observed in the soil exposed to atmospheric CO2 as compared to that in the soil exposed to elevated CO2. Background level of radioactivity was observed in rice plant samples. These observations suggest the possibility that elevated CO2 may affect residual radioactivity of 14C-carbaryl in the soil rather than that in the plant.
참고문헌 (13)
- Reddy, G. V. P., "Elevated atmospheric CO2 affects the chemical quality of brassica plants and the growth rate of the specialist, Plutella xylostella, but not the generalist, Spodoptera littoralis", J. Agric. Food Chem, 52, pp.4185~4191 (2002)
- Kim, H. Y., "Seasonal changes in the effects of elevated CO2 on rice at three levels of nitrogen supply: a free air CO2 enrichment (FACE) experiment", Global Change Biol, 9, pp.826~837 (2003)
- Ziska, L. H., "Growth and yield response of field-grown tropical rice to increasing carbon dioxide and air temperature", Agro. J, 89, pp.45~53 (1997)
- Kimball, B. A., "Responses of agricultural crops of free-air CO2 enrichment", Adv. Agro, 77, pp.293~368 (2002)
- Søe, A. R. B., "Soil respiration under elevated CO2 and its partitioning into recently assimilated and older carbon sources", Plant and Soil, 262, pp.85~94 (2004)
- Craine, J. M., "The response of soil CO2 flux to changes in atmospheric CO2, nitrogen supply and plant diversity", Global Change Biol, 7, pp.947~953 (2001)
- Schortemeyer, M., "Microbial community changes in the rhizospheres of white clover and perennial ryegrass exposed to free air carbon dioxide enrichment (FACE)", Soil Biol. Biochem., 28, pp.1717~1724 (1996)
- Montealegre, C. M., "Elevated atmospheric CO2 alters microbial population structure in a pasture ecosystem", Global Change Biol, 6, pp.475~482 (2000)
- Montealegre, C. M., "Changes in microbial activity and composition in a pasture ecosystem exposed to elevated atmospheric carbon dioxide", Plant and Soil, 243, pp.197~207 (2002)
- Sadowsky, M. J., "Soil microbial responses to increased concentration atmosphere CO2", Global Change Biol., 3, pp.217~224 (1997)
- Zak, D. R, "Elevated atmospheric CO2 and feedback between carbon and nitrogen cycles", Plant and Soil, 151, pp.105~117 (1993)
- Landi, L., "Root exudate effects on the bacterial communities, CO2 evolution, nitrogen transformations and ATP content of rhizosphere and bulk soils", Soil Biol., Biochem, 38, pp.509~516 (2006)
- Freeman, C., "Export of dissolved organic carbon from peatlands under elevated carbon dioxide levels", Nature, 430, pp.195~198 (2004)