Fine root dynamics and partitioning of root respiration into growth and maintenance components in cool temperate deciduous and evergreen forests

被引:12
作者
Sun, Lifei [1 ]
Hirano, Takashi [1 ]
Yazaki, Tomotsugu [1 ,3 ]
Teramoto, Munemasa [2 ]
Liang, Naishen [2 ]
机构
[1] Hokkaido Univ, Res Fac Agr, Kita Ku, N9 W9, Sapporo, Hokkaido 0608589, Japan
[2] Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki, Japan
[3] Meiji Univ, Sch Agr, Kawasaki, Kanagawa, Japan
基金
日本学术振兴会;
关键词
Biomass; Chamber; Ingrowth core; Production; Soil respiration; Trenching; SOIL CO2 EFFLUX; CARBON-DIOXIDE EXCHANGE; LARCH FOREST; ECOSYSTEM RESPIRATION; TERRESTRIAL CARBON; PLANT RESPIRATION; TURNOVER RATES; BIOMASS; PHENOLOGY; LITTER;
D O I
10.1007/s11104-019-04343-z
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Aims We aim to show the seasonality of fine root dynamics and examine the relationship between root respiration (R-r) and fine root dynamics. In addition, we try partitioning R-r into growth (R-g) and maintenance (R-m) components. Methods Soil respiration (R-s), fine root biomass (B), and fine root production (P) were measured simultaneously over a growing season in adjoining deciduous (DF) and evergreen (EF) forests. The R-r was separated from R-s by the trenching method, and R-r was partitioned into R-g and R-m using an empirical model. Results The seasonality of P was almost the same in both forests, though that of B was different. The R-r showed a positive correlation with P in both sites. Annual R-r was estimated to be 610 (DF) and 393 (EF) g C m(-2) year(-1). Annual R-g and R-m were 121 and 166 (DF), and 86 and 182 (EF) g C m(-2) year(-1), respectively. Conclusions We found a clear seasonal pattern in P and a positive linearity between R-r and P. Despite considerable uncertainty due to the small sample size, presence of larger roots, and measurement uncertainty, the results suggest that our approach is capable of partitioning R-r.
引用
收藏
页码:471 / 486
页数:16
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