中国土壤碳氮磷及生态化学计量研究综述

A review of soil carbon,nitrogen,phosphorus and stoichiometry studies in China

土壤碳氮磷及化学计量比不仅能反映土壤中有机质的数量和质量,更能体现出土壤中元素的平衡和制约关系,对理解生态特异性与稳定性具有重要意义。本文对中国土壤碳氮磷及化学计量比时空变化特征及驱动因子的研究成果进行了总结与分析,尝试厘清中国不同时空尺度土壤碳氮磷及化学计量比的演变规律,并对未来的研究重点进行了展望。结果表明,在水热因素、土地利用/覆被类型和土壤理化性质等条件的共同作用下,土壤碳氮磷及化学计量比在时空格局上呈现不同的变化规律。本文阐明了中国土壤化学计量特征的影响机制以及生物地球化学耦合循环的规律,为深化生态系统生态学研究提供有力的理论支撑。

Soil C,N,P contents and stoichiometric ratios reflect the quantity and quality of soil organic matter,as well as element balance and constraints,which is of great significance for understanding ecological specificity and stability.Here,we summarized and analyzed the research on the spatial and temporal variations of soil C,N,P and their ratios and the driving factors in China,aiming to clarify the evolution of soil C,N,P and stoichiometric ratios at different spatial and temporal scales in China,and prospected the future research focuses.Under the combined effects of hydrothermal factors,land use/cover types and soil physicochemical properties,soil C,N,P and stoi-chiometric ratios showed different patterns in spatial and temporal scales.We further elucidated the mechanisms un-derlying stoichiometric characteristics and the coupling patterns of biogeochemical cycles.Our review will provide strong theoretical support for further research in ecosystem ecology.