大气CO_2浓度上升对植物地下竞争的影响

Effect of elevated CO_2 on below-ground plant competition.

植物地下竞争是影响农业生态系统和自然生态系统中植物群落结构变化的重要因素,而大气CO2浓度升高直接或间接影响了植物的生长及其地下环境,可能需重新评估植物地下竞争的状况。本文从大气CO2浓度升高对植物根系形态结构、生理吸收能力、根系共生真菌、叶片蒸腾速率的影响以及对地下竞争因子的土壤环境方面的影响,探讨未来CO2浓度升高条件下地下竞争的变化。

Below-ground competition is one of the major factors that induces structural changes of plant community in agricuhure or nature ecosystems. Elevated CO2 can directly or indirectly influence plant growth and below-ground environment,and consequently plant competition for underground nutrients. This paper summarizes the effects of CO2 enrichment on plant competition underground from the aspects of root structural morphology, root physiologically absorbing ability, mutual mycorrhizal, and soil environment by discussing the characteristics of plant underground competition under enriched CO2 condition.