全 文 ：大气 CO2浓度和温度升高对作物生理生态的影响*
李伏生1 * * 康绍忠2 张富仓2
( 1广西大学农学院, 南宁 530005; 2教育部农业部旱区农业水土工程研究所,杨凌 712100)
摘要 论述了大气 CO2 浓度和温度升高下的植物生长、光合作用、产量以及水分养分利用效率等方面
的研究进展. 未来高 CO 2浓度下, 光合作用速率有不同程度的提高 ,生物量和产量增加;气孔导度降低 ,水
分利用效率( WUE)提高;一般地上部分和根系尤其是细根生物量增加, 凋落物量随之增加, C/ N 比率提
高, 植物残体的腐解速率降低. CO2 浓度升高后, 会给根际微生物带来更多的底物, 从而提高了微生物活
性, 加速养分的矿化过程,改善植物的养分状况.
关键词 大气 CO2 浓度 温度 水分利用效率 养分
文章编号 1001- 9332( 2002) 09- 1169- 05 中图分类号 Q949, S158 文献标识码 A
Effect of atmospheric CO2 and temperature increment on crop physiology and ecology. L I Fusheng
1 , KANG
Shaozhong2 , ZHANG Fucang2 ( 1 Agr icultural College, G uangx i Univ ersity , Nanning 530005; 2 I nstitute of A
gr icultural Soil & Water Engineer ing in the A rid and Semiar id , M inistry of Education & Agr icul tural ,
Yangling 712100. - China. J . A p ll . Ecol . , 2002, 13(9) : 1169~ 1173. )
The effect of atmospher ic CO2 and temperatur e increment on crop grow th, photosynthesis, y ield, and water and
nutrient use efficiency w as summarized and discussed in this paper . Under high CO2 concentration in the future,
the photosynthetic rate of crops may be enhanced to some ex tent, and t heir biomass and y ield may also be in
creased. Their stomatal conductance may be reduced, w hile water use efficiency ( WUE) may by increased under
elevated CO2 concentration. The abovegr ound biomass and root production, especially fine root production, w ill be
greatly enhanced, and consequently, litter production increased, C/ N ratios increased, plant litter decomposition
rates declined under CO2 enr ichment. Plants g rown under elev ated CO2 concentration may release more substr ate
into rhizosphere, which may lead to an incr eased act ivity of soil microorg anisms, accelerat ed mineralization of nu
trients, and improved nutritional status of the plant.
Key words Atmospher ic CO2 concentration, Temperature, WUE, Nutrient.
应 用 生 态 学 报 2002 年 9 月 第 13 卷 第 9 期
CHINESE JOURNAL OF APPLIED ECOLOGY, Sept. 2002, 13( 9)!1169~ 1173
1170 应 用 生 态 学 报 13卷
11719 期 李伏生等:大气 CO2 浓度和温度升高对作物生理生态的影响
1172 应 用 生 态 学 报 13卷
11739 期 李伏生等:大气 CO2 浓度和温度升高对作物生理生态的影响