全球变化背景下磷生物地球化学循环研究进展  

Progress in phosphorus biogeochemical cycle under global changes

作　　者：彭淑娴 陈登鹏 王嘉伟 自学芬 曾铭 刘嫦娥[1,2] 段昌群 PENG Shu-xian;CHEN Deng-peng;WANG Jia-wei;ZI Xue-fen;ZENG Ming;LIU Chang-e;DUAN Chang-qun(School of Ecology and Environmental Science,Yunnan University,Kunming 650091,China;Yunnan Key Laboratory of Plateau Ecology and Degraded Environment Restoration,Kunming 650091,China)

机构地区：[1]云南大学生态与环境学院,云南昆明650091 [2]云南省高原山地生态与退化环境修复重点实验室,云南昆明650091

出　　处：《环境生态学》2020年第12期1-7,22,共8页Environmental Ecology

基　　金：云南省重点研发项目(2019BC001,2017IB031,C6183014);云南大学研究生科技创新项目(2018200)资助。

摘　　要：磷是陆地生态系统生产力最主要的限制元素之一,全球变化已对磷生物地球化学循环产生了不容忽视的影响。关于全球变化背景下磷生物地球化学循环的研究已有不少,然而尚缺乏对其整体的认识。通过搜集国内外已发表的相关文章,在文献综合分析的基础上,介绍了全球变化对磷生物地球化学循环影响的研究方法,包括磷素分级法、试验模拟与模型分析和生态化学计量法等;概述了全球变化对磷生物地球化学循环的影响研究,包括通过改变植物群落组成及生物量,磷迁移转化过程以及大气中磷含量,从土壤—植物、土壤—水域和地表—大气3个耦联系统分别对磷生物地球化学循环产生影响;探讨了全球变化影响磷生物地球化学循环的机制。全球变化可通过调整植物磷素利用、再分配效率,改变磷素迁移介质的结构、性能,改变磷酸酶活性、植物光合速率、磷素可利用形态及微生物活性等途径影响磷生物地球化学循环,指出了当前研究存在的问题及未来研究的方向。Phosphorus is the nutrient that most limits terrestrial production.Over the last several decades,anthropogenic activities such as intensive agriculture and industry have caused a great increase in global changes.For example,the monthly mean phosphorus output during the 34 years in southern Finland shows that climate change has increased the phosphorus output by 2.5%,and is projected to increase further in the coming decades.Deteriorated global changes will have many effects on the biogeochemical cycle of phosphorus(P).Previous studies have shown that long-term global changes will change the utilization of nutrients by plants,alter soil structure and composition and inhibit plant and microbial physiological activities,and thus affect the P biogeochemical cycle.In recent years,the effects of global changes on the P biogeochemical cycle have received much attention,because P is one of the most important limiting factors for terrestrial production,and the world is facing a problem of P deficiency.Although a series of studies were conducted that investigated the effect of global changes on the P biogeochemical cycle,a general knowledge base has not yet been established.We used data from existing studies to summarize how global changes affect the P biogeochemical cycle.The following aspects were described:1)the concept of the P biogeochemical cycle and 2)common methods used to study the effects of global changes on the P biogeochemical cycle,including the phosphorus classification method,simulated test,and model analysis,and stoichiometry.Besides,3)the results of previous studies on the effect of global changes on the P biogeochemical cycle were summarized.In general,whether global changes accelerate the P biogeochemical cycle is controversial.Three conclusions can be drawn about the effects of global changes on three major coupling systems.1)Soil-plant coupling system:affecting plant community composition.2)Soil-water coupling system:changing the effect of water medium on P migration and transformation.3)Surface-atmos

关 键 词：磷素分级 生态化学计量学 耦联系统 

分 类 号：X142[环境科学与工程—环境科学]