我国西南喀斯特森林生态系统生态化学计量学研究

喀斯特森林生态系统作为喀斯特生态系统的重要组成部分，其生态化学计量特征是喀斯特生态系统研究的热点。对比其他森林生态系统，我国西南喀斯特森林生态系统的植物具有较高的C含量和较低的N、P含量，植物生长一般会受到N、P的限制；凋落物和土壤N、P含量较高，不同植被类型土壤P含量有很大差异；随着植被正向演替的进行，土壤N含量和凋落物N、P含量有逐渐增加的趋势；喀斯特森林生态系统化学计量特征主要受到植物个体差异、气候、地形和人类活动的影响。文中系统总结了我国西南喀斯特森林生态系统的研究概况、生态化学计量特征、影响因素及研究方向，并针对我国西南喀斯特森林生态系统生态化学计量学研究亟待解决的科学问题从4个方面进行了研究展望。

Research Progress in Ecological Stoichiometry of Karst Forest Ecosystem in Southwest China

Karst forest ecosystem is an important part of karst ecosystem,and its ecological stoichiometric characteristic is the research hotspot of karst ecosystem. Compared with plants in other forest ecosystems,plants in karst ecosystem have higher C content and lower N,P contents,and the growth of plants is generally limited by N and P. Soil and litters have higher contents of N and P,and the content of P in soil varies greatly in different forests vegetation types. With the positive succession of vegetation,soil N content and litter N and P contents increase gradually. The stoichiometric characteristics of karst forest ecosystem are mainly affected by individual plants difference,climates,landforms and human activities. This paper reviewed the research progress in karst forest ecosystem in the southwest China,and their ecological stoichiometric characteristics,influencing factors and research directions,and prospected the future research in this regard from 4 aspects with the eye on the scientific issues that needed to be urgently solved for the study of ecological stoichiometry of karst forest ecosystem in the southwest China.