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Bulletin of Botanical Research ›› 2008, Vol. 28 ›› Issue (1): 98-103.doi: 10.7525/j.issn.1673-5102.2008.01.021

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Study on Interspecific Associations of Natural Nitraria tangtorum Population and Its Main Companion Species in Ulanbuh Desert

LI Zhi-San;LI Feng-Ri   

  1. Forestry College, Northeast Forestry University, Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-20 Published:2008-01-20
  • Contact: LI Zhi-San
  • Supported by:

Abstract: A series of techniques including the variance analysis (VR), χ2-test, the association co-efficient(AC), the percentage of co-ocurrenc (PC) consulting the association indices(OIDJJI)were used together with a 2×2 contingency table to analyze the interspecific associations of natural Nitraria tangtorum population and its main companion species in Ulanbuh Desert Inner Mongolia. Result: In the natural Nitraria tangtorum population,the association of 8 dominant species showed no correlation. By the calculation results, in the all 28 species-pairs, there are 15 species-pairs which revealed positive association, and 13 species-pairs revealed negative association. Most of the species-pairs revealed little significant association except Nitraria tangtorumArtemisia ordosica. Nitraria tangtorumArtemisia ordosica revealed significant negative association.. Nitraria tangtorum-herbage and other herbaceous species-pairs distributions trend to be independent. The result is very important to construct steady desert plant community, reconstruct desert plant community and regulate ecological pattern in theory.

Key words: Natural Nitraria tangtorum, interspecific associations, population, Ulanbuh Desert

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