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[1]KANG Bo-wen,LIU Jian-jun,SUN Jian-hua,et al.Study on Root Distribution of Artemisa Ordosica in Mu Us Sandy Land[J].Research of Soil and Water Conservation,2010,17(04):119-123.

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Study on Root Distribution of Artemisa Ordosica in Mu Us Sandy Land

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 04 Page number: 119-123 Column: Public date: 2010-08-20

Title:: Study on Root Distribution of Artemisa Ordosica in Mu Us Sandy Land

Author(s):: KANG Bo-wen¹, LIU Jian-jun¹, SUN Jian-hua¹, LI Yan-feng²; 1. College of Forestry, Northwest A&F University, Yangling Shaanxi 712100, China;
2. Inner Mongolian Bayannor Conservation of Water and Soil Station, Bayannaoer, Inner Mongolia 015000, China

Keywords:: Mu Us Desert; Arternisia ordosica; root system; distribution characteristic

CLC:: Q945.3

DOI:: -

Abstract:: Study on root distribution plays an important role in the vegetation recovery and regeneration,the choice of suitable species,improving afforestation survival,preserving rate,and benefit to master sandy plant root growth and its vertical distribution.This paper studied the spatial-temporal root distribution of the Arternisia ordosica in moving dune,semi-fixed dune,and fixed dune of Mu Us sandy land by embedding reticular bag soil core,layered excavating,and analysis system of root.The range of Arternisia root biomass was varied by the ages and the distributions in the soil layers were different.The root biomass was increased with the ages,and come to the maximum in a certain period of growth,then gradually decreased and kept stable.The roots extended to the deeper soil layers along with the increase of age,and the root biomass exponentially declined with the depth of soil.The root biomasses of Arternisia at the age of one to five years were mainly in 0-60cm soil layer,whose percentage were 99.06%,97.71%,94.31%,93.82%,84.35%.In 0-20cm,the percentage of the root biomass of total root (PBT) reduced with the ages.In 20-60cm,the PBT increased at first and then decreased.The variation and the distribution of the root length were similar as the pattern of the biomass,and the root length difference in different soil layers increased with the ages,but the root length exponentially declined with the depth of soil.Specific root length (SRL) can reflect the characteristics of habitat flexibility of plants.The variation of SRL of Arternisia showed that the means of SRL decreased with the ages in 0-200cm soil layer and the one year was the largest in five age stages.The five-year plant input the most carbon but has the least SRL.The efficiency of inputting carbon for root length construction decreased with the increase of age.The SRL was different in different soil layers at the same age.It was indicated that the plants had a high plasticity to their living environment and reflected the difference among the soil conditions.

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