Rhizosphere Respiration and Root Demography in Forest Ecosystems

森林生态系统的根际响应与根系种群根系影响土壤带（根际）是碳循环的重要组成部分。 通过（1）测定森林根际呼吸，（2）将森林根际呼吸与根的种群结构联系起来，（3）建立树木根际呼吸模型，将显著提高我们对根际呼吸这一关键要素的认识。 这项研究将检查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，从而有可能检查地下所有主要的C通量。 将建立一个经验模型，以便在森林地下碳通量和全球碳循环之间建立联系。

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.