Rhizosphere Respiration and Root Demography in Forest Ecosystems

森林生态系统的根际呼吸与根系人口学根影响土壤区（根际）是C循环的关键组成部分之一。提出的研究将通过(1)确定森林的根际呼吸，(2)将森林根际呼吸与根系种群结构联系起来，(3)建立树木根际呼吸模型，显著提高我们对根际呼吸这一关键要素的理解。这项研究将检验根际呼吸是否比微生物呼吸对环境中的物理因素（如温度）更敏感。这项工作将首次将土壤根系和微生物呼吸分离开来，从而有可能检查地下所有主要的碳通量。将开发一个经验模型，以便建立森林地下碳通量与全球碳循环之间的联系。

Cheng9973995Rhizosphere Respiration and root demography in forest ecosystemsThe root influenced soil zone (rhizosphere) is one of the key components of the C cycle. The proposed research will significantly enhance our understanding of a critical element of the rhizosphere, its respiration, by (1) determining the rhizosphere respiration in a forest, (2) linking the forest rhizosphere respiration with the population structure of the roots and (3) developing a tree rhizosphere respiration model. The research will examine whether rhizosphere respiration is more sensitive than microbialrespiration to physical factors in the environment such as temperature. This work will, for the first time, separate soil root and microbial respiration making it possible to examine all major C fluxes belowground. An empirical model will be developed which will allow the creation of linkages between forest belowground C fluxes and the global C cycle.