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当前位置: 首页 > 文章 > CO_2浓度升高条件下水稻蒸腾与N吸收的关系 中国水稻科学 2006,20 (2) 205-209
Position: Home > Articles > Relations Between Transpiration and N Uptake of Rice Grown in Elevated Air Carbon Dioxide Concentration Chinese Journal of Rice Science 2006,20 (2) 205-209

CO_2浓度升高条件下水稻蒸腾与N吸收的关系

作  者：
庞静;朱建国;谢祖彬;刘刚;陈改苹
单  位：
中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室
关键词：
相关关系;蒸腾速率;氮吸收速率;二氧化碳浓度升高;水稻
摘  要：
利用FACE(FreeAirCarbon-DioxideEnrichment)平台技术,用水培试验研究了低氮(14mg/L)和高氮(28mg/L)水平下,大气CO2浓度升高条件下水稻蒸腾与N吸收速率的相关关系。结果表明,在CO2浓度升高条件下,水稻生物量增加了36%(低N)和29%(高N);总吸N量也增加达7%(低N)和5%(高N);而总蒸腾量减少28%(低N)和10%(高N)。由于促进更多分蘖的发生,高CO2浓度使分蘖期水稻平均N吸收速率提高了31%~156%(低N)和19%~87%(高N),在其他时期无明显影响;而高CO2浓度对水稻平均蒸腾速率的影响主要表现在抽穗到灌浆末期。在对照条件下,平均蒸腾速率和平均N吸收速率呈显著正相关;但在CO2浓度升高条件下,两者相关关系不显著。说明人们所推测的“蒸腾效应”———高CO2浓度条件下降低了的蒸腾作用并非影响水稻N吸收的关键因素。
译  名：
Relations Between Transpiration and N Uptake of Rice Grown in Elevated Air Carbon Dioxide Concentration
作  者：
PANG Jing 1,2,*, ZHU Jian-guo 1, XIE Zu-bin 1, LIU Gang 1, CHEN Gai-ping 1( 1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; 2Faculty of Resource and Environment, Hubei University, Wuhan 430062, China;)
关键词：
correlation; transpiration rate; nitrogen uptake rate; elevated air carbon dioxide concentration; rice
摘  要：
Correlation between transpiration and N uptake rate of rice at low N (LN, 14 mg/L) and high N (HN, 28 mg/L) in solution culture was studied under ambient air and elevated atmospheric p_ CO_2 (Ambient+200 μmol/mol) by the China FACE (Free-Air CO_ 2 Enrichment). Elevated p_ CO_2 increased rice biomass and total N uptake significantly by 36% and 7% at LN, 29% and 5% at HN, respectively, while decreased total amount of transpiration by 28% at LN and 10% at HN. Elevated p_ CO_2 stimulated average N uptake rate at the tillering stage as the result of enhanced occurrence of tillers. However, the significant effect of elevated p_ CO_2 on average transpiration rate was only observed from the panicle initiation to late filling stage. The positive correlation between transpiration rate and N uptake rate was significant at Ambient but not elevated p_ CO_2, indicating that declined transpiration caused by CO_ 2 enrichment may not be the key factor affecting N uptake.

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