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Acta Prataculturae Sinica ›› 2010, Vol. 19 ›› Issue (3): 47-55.

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A study on the biomass of Oxytropis coerulea-Carex dispalata meadow and Bothriochloa ischaemum hassock in Wutai mountain

MA Ni1, SHANGGUAN Tie-liang1, ZHANG Qiu-hua1, ZHANG Zuo2   

  1. 1. College of Environment and Resource, Shanxi University, Taiyuan 030006, China;
    2. Institute of
    Animal Sciences, Academy of Agricultural Sciences, Taiyuan 030032, China
  • Received:2009-05-04 Online:2010-03-25 Published:2010-06-20

Abstract: A locating quadrat investigation and forage harvest methods were applied to study the phytocoenological characteristics, biomass and height dynamics in meadows dominated by Oxytropis coerulea and Carex dispalata, or by hassocks of Bothriochloa ischaemum in the Wutai mountains of Shanxi province. Both species composition and community structure differed greatly between the two communities. The total biomasses of the two communities were 7 282.98 and 4 184.68 g/m2 respectively, of which the aboveground biomass (stem, leaves, and spike) were 1 018.34 and 890.08 g/m2 while the underground biomasses were 6 264.64 and 3 294.60 g/m2. In addition, the height dynamics of the dominant species in the two communities including O. coerulea, C. dispalata, B. ischaemum and Themeda japonica were simulated using the Logistic model, starting from recovering to blooming stage. The F-test showed there were significant correlations. However, the heights of O. coerulea and C. dispalata decreased rapidly due to the abscission of seed and apex of dried-up and broken stems during the maturation and withering stages, which therefore did not fit the Logistic model.

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