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Vegetation in Karst Terrain of Southwestern China Allocates More Biomass to Roots : Volume 6, Issue 3 (02/07/2015)

By Ni, J.

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Book Id: WPLBN0004021354
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Vegetation in Karst Terrain of Southwestern China Allocates More Biomass to Roots : Volume 6, Issue 3 (02/07/2015)  
Author: Ni, J.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Solid, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Zhang, Z. H., Xia, J., Hu, G., Luo, D. H., & Ni, J. (2015). Vegetation in Karst Terrain of Southwestern China Allocates More Biomass to Roots : Volume 6, Issue 3 (02/07/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China. In mountainous areas of southwestern China, especially Guizhou province, continuous, broadly distributed karst landscapes with harsh and fragile habitats often lead to land degradation. Research indicates that vegetation located in karst terrains has low aboveground biomass and land degradation that reduces vegetation biomass, but belowground biomass measurements are rarely reported. Using the soil pit method, we investigated the root biomass of karst vegetation in five land cover types: grassland, grass–scrub tussock, thorn–scrub shrubland, scrub–tree forest, and mixed evergreen and deciduous forest in Maolan, southern Guizhou province, growing in two different soil-rich and rock-dominated habitats. The results show that roots in karst vegetation, especially the coarse roots, and roots in rocky habitats are mostly distributed in the topsoil layers (89 % on the surface up to 20 cm depth). The total root biomass in all habitats of all vegetation degradation periods is 18.77 Mg ha−1, in which roots in rocky habitat have higher biomass than in earthy habitat, and coarse root biomass is larger than medium and fine root biomass. The root biomass of mixed evergreen and deciduous forest in karst habitat (35.83 Mg ha−1) is not greater than that of most typical, non-karst evergreen broad-leaved forests in subtropical regions of China, but the ratio of root to aboveground biomass in karst forest (0.37) is significantly greater than the mean ratio (0.26 ± 0.07) of subtropical evergreen forests. Vegetation restoration in degraded karst terrain will significantly increase the belowground carbon stock, forming a potential regional carbon sink.

Summary
Vegetation in karst terrain of southwestern China allocates more biomass to roots

Excerpt
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