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Chinese Journal of Applied Ecology ›› 2002, Vol. ›› Issue (9): 1169-1173.

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Effect of atmospheric CO2 and temperature increment on crop physiology and ecology

LI Fusheng1, KANG Shaozhong2, ZHANG Fucang 2   

  1. 1. Agricultural College, Guangxi University, Nanning 530005;
    2. Institute of Agricultural Soil & Water Engineering in the Arid and Semiarid, Ministry of Education & Agricultural, Yangling 712100
  • Received:2000-08-18 Revised:2000-10-15 Online:2002-09-15

Abstract: The effect of atmospheric CO2 and temperature increment on crop growth,photosynthesis,yield,and water and nutrient use efficiency was summarized and discussed in this paper.Under high CO2 concentration in the future,the photosynthetic rate of crops may be enhanced to some extent,and their biomass and yield may also be increased.Their stomatal conductance may be reduced,while water use efficiency (WUE) may by increased under elevated CO2 concentration.The aboveground biomass and root production,especially fine root production,will be greatly enhanced,and consequently,litter production increased,C/Nratios increased,plant litter decomposition rates declined under CO2 enrichment.Plants grown under elevated CO2 concentration may release more substrate into rhizosphere,which may lead to an increased activity of soil microorganisms,accelerated mineralization of nutrients,and improved nutritional status of the plant.

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