自由空气CO_2浓度升高对水稻营养元素吸收和籽粒中营养元素含量的影响  

Effects of Elevated pCO_2 on Nutrient Uptake by Rice and Nutrient Contents in Rice Grain

作　　者：庞静[1,2] 朱建国[1] 谢祖彬[1] 陈改苹[1] 刘刚[1] 张雅丽[1] 

机构地区：[1]中国科学院 [2]湖北大学资源环境学院,湖北武汉430062

出　　处：《中国水稻科学》2005年第4期350-354,共5页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目(40271061);国家自然科学基金重大国际合作研究项目(40120140817);中国科学院知识创新重要方向资助项目(kzcx2-408);国家973计划资助项目(2002CB412502;2003CB714003)。

摘　　要：利用FACE(Free-AirCarbon-DioxideEnrichment)平台技术,用水培试验研究了低氮(14mg/L)和常氮(28mg/L)水平下,大气CO2浓度升高对水稻(OryzasativaL.)N、P、K、Ca、Mg、Cu、Zn、Fe、Mn的吸收和在植株不同部位的分配,并着重分析了CO2浓度升高对稻米中营养元素含量的影响。结果表明,按照当前CO2浓度条件下营养元素的正常供应水平,而且各元素都以有效态供给时,CO2浓度升高对多数被测元素吸收总量影响不大,只增加了K、Ca、Fe的吸收总量;N、P、Mg、Mn向穗部分配增加,K、Ca、Cu、Zn、Fe向穗部的分配比例不变;水稻籽粒中P、Ca、Mg、Cu、Zn、Fe和Mn含量无显著影响,N、K含量显著下降。还初步探讨了CO2浓度升高对稻米中人类必需营养元素的不足(或“隐性饥饿”)的影响。Nutrient uptake and distribution in different tissues of rice (Oryza sativa L.) and nutrient contents in grain at low N (14 mg/L) and normal N (28 mg/L) were studied under ambient air and elevated atmospheric pCO_(2) (Ambient+200 μmol/mol) by the China FACE (Free-Air Carbon-Dioxide Enrichment). Supplied with available forms of nutrients at current normal level, rice uptook more K, Ca, Fe under elevated pCO_(2) treatment. N, P, Mg, Mn but not K, Ca, Cu, Zn, Fe distribution in panicle increased due to elevated pCO_2 treatment. P, Ca, Mg, Cu, Zn, Fe, Mn contnets in rice grain remained unaffected while N, K contents declined significantly under elevated pCO_(2) treatment. Effect of elevated pCO_(2) on the possible “hidden hunger” in rice grain was also discussed.

关 键 词：CO2浓度升高 水稻 营养元素吸收与分配 营养元素含量 籽粒 

分 类 号：S511[农业科学—作物学]