关键词: 陕西, 陕西, 秋淋, 过程分析

Abstract: To understand the influence of rising global CO2 concentration and anthropogenic N deposition on plant nutrients, the authors analyzed the domestic and foreign literatures on the response of the carbon (C), nitrogen (N) and phosphorus (P) content of forest plants and their ecological stoichiometric ratios to elevated carbon dioxide (CO2) and N addition and their interaction. The results showed that: (1) elevated CO2 concentration might increase C uptake and decrease the N content of plants, leading to an increase of the ratio of C:N in most of the experiments, and there was no accurate conclusion on P content, so the ratios of N:P were various in different experiments; (2) anthropogenic N deposition in short term might increase carbon stocks and the N content, but decrease the P content of plants, and there was a higher ratio of N:P but a lower ratio of C:N compared with the control group; (3) under the interactive effects of rising CO2 and N deposition, the N, P content and the ratio of N:P always showed a“neutralization effect”, the results showed rising, decreasing or invariable trend in different experiments. CO2 and atmospheric N deposition increased in recent years have showed a more and more obvious trend, and their effects on the ecosystem structure and function also gradually become ecologists’research hotspot at home and abroad. This paper can provide references for further study on the ecosystem structure and function and the ecological stoichiometry characteristics under the rising of exogenous C and N, and put forward countermeasures for plant growth under the background of CO2 enhancement and N deposition.