碳氮磷化学计量比对土壤有机碳矿化激发效应的影响  

Effects of carbon,nitrogen,and phosphorus stoichiometry on the priming of soil carbon mineralization

作　　者：张睿媛 袁丹 秦树平[1] 胡春胜[1,2] ZHANG Ruiyuan;YUAN Dan;QIN Shuping;HU Chunsheng(Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences/Hebei Key Laboratory of Soil Ecology/Key Laboratory of Agricultural Water Resources,Chinese Academy of Sciences,Shijiazhuang 050022,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院遗传与发育生物学研究所农业资源研究中心/河北省土壤生态学重点实验室/中国科学院农业水资源重点实验室,石家庄050022 [2]中国科学院大学,北京100049

出　　处：《中国生态农业学报（中英文）》2023年第8期1311-1321,共11页Chinese Journal of Eco-Agriculture

基　　金：国家重点研发青年科学家项目(2021YFD1500400);河北省重点研发计划项目(21323601D)资助。

摘　　要：土壤有机碳矿化激发效应(priming effects)是指由外源有机物料添加所引起的短期内土壤有机质周转剧烈改变的现象,是影响土壤生态系统碳动态的关键过程之一。尽管激发效应的诱发机制已广为人知,但目前的大多数研究仅考虑了外源有机碳输入的影响。碳氮磷是土壤生态系统中的基本营养元素,碳氮磷化学计量比通过影响微生物可获得的营养元素的均衡进而调控激发效应的方向与强度。本文总结了碳氮磷化学计量比调控土壤激发效应的相关研究进展,分析了土壤碳周转相关微生物群落结构及活性对不同碳氮磷输入配比的响应机制,总结出“共代谢”“微生物营养挖掘”和“化学计量分解”3种有关碳氮磷化学计量比调控激发效应的机制。未来急需将碳氮磷化学计量比调控土壤激发效应的理论运用于农田固碳减排的生产实践,服务于我国“碳达峰碳中和”“双碳”战略的实施。Priming effects of soil organic carbon(SOC)decomposition refer to the phenomenon of drastic short-term changes in soil organic matter turnover caused by the addition of exogenous organic materials.Priming effects are key processes that affect carbon dynamics in soil ecosystems.Although the mechanisms responsible for the occurrence and maintenance of priming effects are well understood,most previous studies have only considered the impact of the input of exogenous available organic carbon on priming effects.Carbon,nitrogen,and phosphorus are basic nutrients in soil ecosystems and their stoichiometric ratios regulate the direction and intensity of priming effects by affecting the balance of nutrient availability to microorganisms.In this paper,the research progress on the regulation of the stoichiometric ratio of carbon,nitrogen,and phosphorus on soil priming effects is summarized,and the responses of microbial community structure and activity relevant to soil carbon turnover to different carbon,nitrogen,and phosphorus input ratios are analyzed.Additionally,three mechanisms on the regulation of carbon,nitrogen,and phosphorus stoichiometric ratio on priming effects are summarized,i.e.,“co-metabolism”“microbial nutrition mining”,and“stoichiometric decomposition”.It is urgent to apply the theory on the regulation of stoichiometry ratio on soil priming effects for carbon sequestration and emission mitigation in farmland,which benefits China’s“carbon peak and carbon neutrality”dual carbon strategy.

关 键 词：激发效应 生态化学计量 土壤有机碳矿化 

分 类 号：S154.1[农业科学—土壤学]