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淳化县不同立地上刺槐根系的分布参数(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2002年05期
Page:
32-36
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
Research on Root Distribution Parameters of Robinia pseudoacacia on Different Sites in Chunhua County
Article ID:
1000-2006(2002)05-0032-05
Author(s):
LI Peng 1ZHAO Zhong 2LI Zhan bin 1WANG Nai jiang 2
1.Institute of Soil and Water Conservation,Chinese Academy of Sciences,Ministry of Water Resources,Yangling 712100,China;2.Northwest Sci technological University of Agriculture and Forestry,Yangling 712100,China
Keywords:
Root system of Robinia pseudoacacia Root extinction coefficientVertical distribution charactersSite conditions
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2002.05.008
Document Code:
A
Abstract:
Root extinction coefficient β ,is one of the most important parameters in determining the vertical distribution depth of tree species.In this study,the root vertical distribution characters of Robinia pseudoacacia ,one of the main tree species for afforestation in Chunhua County in Weibei Loess Plateau,was investigated and its root extinction coefficient on different sites was determined.And the results showed 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 of Robinia pseudoacacia on southern exposition was deeper than that on southren exposition.And the distribution depth of fine roots( Φ <1 mm)was deeper than that of thicker roots( Φ <3 mm),which was in favor of the uptake of water and nutrients from deeper layers,helped the trees to adapt to the arid environment,and promoted the growth of the upper parts of the tree.

References

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Last Update: 1900-01-01