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半干旱草原土壤呼吸组分区分与菌根呼吸的贡献
李伟晶1,2,陈世苹1,*(),张兵伟1,3,谭星儒1,2,王珊珊1,2,游翠海1,2
Partitioning of soil respiration components and evaluating the mycorrhizal contribution to soil respiration in a semiarid grassland
LI Wei-Jing1,2,CHEN Shi-Ping1,*(),ZHANG Bing-Wei1,3,TAN Xing-Ru1,2,WANG Shan-Shan1,2,YOU Cui-Hai1,2

图1. 改进的深浅环法区分土壤呼吸组分示意图(曲线表示菌丝体, 短线表示碎屑)。浅环用来测定土壤总呼吸, 深环用来测定土壤异养呼吸, 菌丝环用来测定土壤异养呼吸和菌根呼吸的和, 浅环和深环测得的土壤呼吸之差为土壤自养呼吸, 浅环和菌丝环测得的土壤呼吸之差为根呼吸, 菌丝环和深环测得的土壤呼吸之差为菌根呼吸。

Fig. 1. Diagram of the modified mini-trenching method in partitioning soil respiration into its components (The curve denotes mycelium and the short line denotes detritus). The shallow and deep collars are used to determine total soil respiration (SRtot) and its heterotrophic component (SRh). Hyphae collar is used for the determination of soil heterotrophic respiration and hyphae respiration (SRh + SRmy). The difference in soil respiration between the shallow and deep collars is used to represent autotrophic soil respiration (SRa), that between the shallow and hyphae collars is used to represent root respiration (SRr), and that between the hyphae and deep collars is used to represent hyphae respiration (SRmy).