Non-Linear Relationships between Fine Root Functional Traits and Biomass in Different Semi-Arid Ecosystems on the Loess Plateau of China
Tian, Zhun (Nanjing University of Information Science and Technology. Changwang School of Honors)
Wang, Rui (Nanjing University of Information Science and Technology. Changwang School of Honors)
Sun, Zihan (Nanjing University of Information Science and Technology. Changwang School of Honors)
Peng, Yang (Nanjing University of Information Science and Technology. School of Applied Meteorology)
Jiang, Mingfeng (Nanjing University of Information Science and Technology. School of Ecology and Applied Meteorology)
Wu, Shiqi (Nanjing University of Information Science and Technology. Changwang School of Honors)
Yuan, Ziqiang (Lanzhou University. College of Ecology)
Song, Xin (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Fang, Chao (Nanjing University of Information Science and Technology. School of Ecology and Applied Meteorology)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2024
Resum:	As a key soil carbon process, changes in plant root growth may have a dramatic impact on the global ecosystem's carbon cycle. Fine root functional traits and fine root biomass can be used as important indexes of plant root growth. Compared with the much better understood relationships between aboveground plant functional traits and aboveground biomass, knowledge on the relationships between fine root functional traits and belowground biomass still remains limited. In this study, plant fine roots in 30 abandoned lands, 9 woodlands, 29 alfalfa grasslands, 30 Caragana shrublands and 29 croplands were sampled at 0-20 and 20-40 cm soil depths in Zhonglianchuan, Yuzhong County, Gansu Province, China (36°02' N, 104°24' E), to clarify the characteristics of the relationships between fine root functional traits (e. g. , diameter, specific root area (SRA) and specific root length (SRL)) and fine root biomass at 0-20 and 20-40 cm soil depths. The results showed that the relationships between the fine root functional traits and fine root biomass in these ecosystems were robust, allowing for the use of an allometric growth model at both 0-20 and 20-40 cm soil depths (p < 0. 05). Specifically, the relationship between root diameter and fine root biomass was consistent with highly significant positive power, while highly significant negative power relationships of SRA and SRL with fine root biomass were observed (p < 0. 01, except the root diameter-biomass models in the woodlands in the 0-20 cm soil layer (p = 0. 017) and 20-40 cm soil layer (p = 0. 025)). The results can provide some parameters for these terrestrial ecosystem process models. From this perspective, our study is beneficial in the construction of suitable strategies to increase plant biomass, which will help with the restoration of the semi-arid region of the Loess Plateau of China.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Forests, Vol. 15, Issue 7 (July 2024) , art. 1226, ISSN 1999-4907

DOI: 10.3390/f15071226

13 p, 4.3 MB

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