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Vertical root distribution characters ofRobinia pseudoacacia on the Loess Plateau in China

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Abstracts

On the Loess Plateau, water is the main limiting factors for vegetation growth. Root distribution characters have special ecological meaning as it reflected the utilizations of trees to the environments. Even-aged stands ofRobinia pseudoacacia on slope lands facing south and north were selected as sampling plots for root distribution investigation. Investigatiing results showed that indicated that on all sites, root biomass decreased with depth, and the distribution depth of fine root was deeper than that of coarser root. The results of variance analysis indicated that there were great differences in root biomass among different diameter classes, and coarser root was the main sources of variance, and the root biomass, especially fine root (ϕ<3mm) biomass on northern exposition sites was bigger than that on southern exposition sites. Analysis of the vertical root distribution parameters, root extinction coefficient, β indicated that the value of β on northern exposition was more than 0.982, while the value of β on southern exposition was less than 0.982, which indicated that the vertical root distribution depth ofRobinia pseudoacacia on southern exposition was deeper than that on southern exposition. And the distribution depth of fine roots (Φ<1mm) was deeper than that of thicker roots(Φ<3mm), which was in favor of the uptake of water and nutrients from deeper layers, helped the trees to adapt the arid environment, and promoted the growth of the upper parts of the tree.

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Authors and Affiliations

  1. Northwest Scientific & Technological University of Agriculture and Forestry, 712100, Yangling, Shaanxi Province, P. R. China

    Li Peng & Zhao Zhong

  2. Forest College, Xi'an University of Technology, 710048, Xi'an Shaanxi

    Li Peng & Li Zhan-bin

Authors
  1. Li Peng
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  2. Zhao Zhong
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  3. Li Zhan-bin
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Correspondence to Li Peng.

Additional information

Foundation Item: This research was supported by National Natural Science Foundation of China (30371150 and 40371075).

Biography: LI Peng (1974-) male, post: Ph. D. in Northwest Scientific & Technological University of Agriculture and Forestry, Yangling 712100, Shaanxi Province, P. R. China. Tel: 029-82312651.

Responsible editor: Chai Ruihal

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Peng, L., Zhong, Z. & Zhan-bin, L. Vertical root distribution characters ofRobinia pseudoacacia on the Loess Plateau in China. Journal of Forestry Research 15, 87–92 (2004). https://doi.org/10.1007/BF02856740

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  • DOI: https://doi.org/10.1007/BF02856740

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