NDLI: Fine root interactions in subtropical mixed forests in China depend on tree species composition

Content Provider	Springer Nature Link
Author	Xiang, Wenhua Fan, Gangwei Lei, Pifeng Zeng, Yelin Tong, Jie Fang, Xi Deng, Xiangwen Peng, Changhui
Copyright Year	2015
Abstract	Belowground interactions can greatly modify fine root (≤2 mm in diameter) traits to increase soil resource acquisition for tree growth. We examined how mixed forests alter fine root traits compared to pure forests.A pseudo-experimental tree cluster design was used to select small-area plots of single and mixed species in a Pinus massoniana–Lithocarpus glaber (PM–LG) forest and a L. glaber–Cyclobalanopsis glauca (LG–CG) forest. In each plot, soil cores were sampled down to 30 cm at a 0.5 m interval between target and neighbouring trees. Fine roots in soil cores were then divided by species to determine biomass and morphological traits.The mixed PM–LG plots exhibited significantly higher fine root biomass while the mixed LG–CG plots had no significant differences in fine root biomass compared to their respective pure plots. In pure plots, P. massoniana had higher fine root biomass and lower specific root length (SRL) and specific root area (SRA) than L. glaber, whereas fine root traits were similar for L. glaber and C. glauca. Compared with pure plots for a given species, fine root biomass in the entire soil profile decreased for P. massoniana but increased for L. glaber in mixed PM–LG plots. In mixed LG–CG plots, fine root biomass decreased for each species at all soil depths.Whether positive interactions of fine roots occur is dependent on tree species composition. Fine root biomass was greater in mixed forests where tree species showed contrasting growth strategies and root traits, such as PM-LG forests, thus suggesting positive interactions.
Starting Page	335
Ending Page	349
Page Count	15
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	395
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-06-27
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Competition ability index Fine root biomass Fine root morphology Subtropical secondary forest Tree species composition Vertical distribution Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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