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JOURNAL OF DESERT RESEARCH ›› 2018, Vol. 38 ›› Issue (2): 352-362.DOI: 10.7522/j.issn.1000-694X.2016.00153

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Carbon Density in Dominant Desert Shrub Species Ecosystem in West Ordos Region

Dang Xiaohong1,2, Gao Yong1, Meng Zhongju1, Gao Junliang3, Ding Yanlong1, Wang Zhenyi1   

  1. 1. Desert Science and Engineering College/Wind Erosion Key Laboratory of Central and Local Government, Inner Mongolia Agriculture University, Hohhot 010018, China;
    2. Hangjin Desert Ecological Position Research Station, Erdos 017400, Inner Mongolia, China;
    3. Experimental Center of Desert Forestry, Chinese Academy of Forestry, Bayannur 015200, Inner Mongolia, China
  • Received:2016-08-16 Revised:2016-11-18 Online:2018-03-20 Published:2018-03-20

Abstract: To estimate carbon storage of natural desert shrub ecosystem in west Ordos plateau and reveal the distribution rules in different layers (shrub, herb, litter and soil) and organs of each shrub species, we set 3-5 sample plots respectively according to typical sampling method in five dominant desert shrub species(Ammopiptanthus mogolicus, Zygophyllum xanthoxylum, Tetraena mongolica, Helianthemum songaricum and Reaumuria songarica) in Yikebulage steppe desert experimental area and measured the carbon storage of desert shrub ecosystem using biomass harvest method. The results showed that the carbon storage differences among five desert shrub ecosystems and its carbon storage was in the range of 40.28-55.51 t hm-2, in which the carbon storage of soil layer was the most(97.15%-98.51%) and the carbon storage was in the range of 40.28-55.51 t·hm-2. The soil carbon storage was increasing with the soil depth. The biomass carbon density in plant layer was shrub layer > herb layer > litter layer. The biomass carbon density of shrub layer was more with the distance increasing to Yellow River and the biomass carbon density of the nearest site of A. mogolicus and the farthest site of H.songaricum was respectively 92.16% and 62.42% of the plant layer. However, the herb layer showed the opposite rule as the shrub layer. The root biomass carbon was the main part of shrub ecosystem and its biomass carbon density was in the range of 8.41-38.29 g·m-2, which was 5.36%-45.18% of plant layer carbon density. Except P. songarica shrub ecosystem, the carbon storage of belowground part in other four desert shrubs was more than aboveground part (P<0.05). The carbon storage of single shrub showed that branches>roots>leaves. The thick root sand branches were the main contributors to carbon storage of single shrub and showed obvious differences among shrub species (P<0.05). The roots and leaves carbon storage was 20.00%-33.53% and 2.02%-24.54% of the total plant layer.

Key words: desert shrub, carbon storage, ecosystem, carbon sequestration, Ordos

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