干旱区研究

Arid Zone Research ›› 2016, Vol. 33 ›› Issue (1): 166-171.doi: 10.13866/j.azr.2016.01.211

• Plant Ecology • Previous Articles     Next Articles

Relationship between Root Biomass Distribution and Soil Moisture, Nutrient for Two Desert Plant Species

GUO Jing-heng1,2,3,4,5, LI Chang-jun1,2,3,4,5,6, ZENG Fan-jiang1,2,3,4, ZHANG Bo1,2,3,4,5, LIU Bo1,2,3,4,5, GUO Zi-chun1,2,3,4,5   

  1. 1. Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;
    2. Cele National Field Science Observation and Research Station of Desert Grassland Ecosystem,Cele 848300,Xinjiang,China;
    3. Key Laboratory of Biogeography and Bioresource in Arid Land,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;
    4. State Key Laboratory of Desert and Oasis Ecology,Urumqi 830011,Xinjiang,China;
    5. University of Chinese Academy of Sciences,Beijing 100049,China;
    6. College of Resources and Environment Science,Xinjiang University,Urumqi 830046,Xinjiang,China
  • Received:2014-03-03 Revised:2014-03-28 Online:2016-01-15 Published:2016-01-29

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Abstract: With the field work of digging the root and the lab analysis of samples,we have tested the soil moisture and nutrients in the Tamarix ramosissima and Haloxylon ammodendron fields,analyzed the relationship between the vertical distribution of root biomass and the soil moisture and nutrient of two desert plant species. The results showed that: ① With the soil depth increased,the root biomass of two desert plant species gradually reduce,in line with the exponential decline model. The root biomass of Tamarix ramosissima was 2.36 times with the same age of Haloxylon ammodendron. ② The soil water content of two kind of desert plant fields is significant different while there is no significant difference of nutrient.③ The root biomass of two desert plant species had extremely significant relationship with the soil moisture,the correlation coefficient was 0.885 and 0.988,respectively showed that in arid areas,soil moisture conditions had an enormous influence upon the plant root growth and development. ④ There was not significance between the root biomass of two desert plant species and soil nutrient,indicated that in the southern margin of the Taklimakan desert,the soil nutrient is not restrictive factors of plant root growth.

Key words: Tamarix ramosissima, Haloxylon ammodendron, root biomass, soil moisture, soil nutrient