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Journal of Desert Research ›› 2019, Vol. 39 ›› Issue (3): 66-76.DOI: 10.7522/j.issn.1000-694X.2018.00047

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Variation of Soil Respiration Rate and the Influencing Factors in Artemisia halodendron Habitats and Bare Land

Ma Liqun1, Liu Tingxi1,2, Wang Guanli1,2, Duan Limin1,2, Han Chunxue1, He Tao1   

  1. 1. Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University Hohhot 010018, China;
    2. Key Laboratory of Water Resource Protection and Utilization, Inner Mongolia Agricultural University Hohhot 010018, China
  • Received:2018-03-03 Revised:2018-05-02 Published:2019-06-10

Abstract: Soil respiration of Artemisia halodendron habitats and bare land is an important process of the carbon cycle in desert ecosystems. In this article, the soil respiration in Horqin semi-mobile dune was determined by using li-6400 soil respiratory system, the diurnal (24 h), seasonal variation, influencing factors and their differences were analyzed. The results showed that: (1) the diurnal variation of soil respiration rate in dune was multimoda, the respiration rate of the night soil was higher than that of the daytime soil, the diurnal variation of soil respiration in dune was positively correlated with the obvious power function of air humidity. (2) except on the July 7 and 19, the seasonal changes of the soil respiration rate was higher in A. halodendron habitat than bare land. (3) A. halodendron and bare land soil respiration were significantly correlated to soil temperature (P<0.05), the correlation coefficient is 0.602 and 0.562, respectively. A. halodendron and bare land soil respiration were also significantly correlated to soil moisture content (P<0.05), the correlation coefficient is 0.804 and 0.624, respectively. The quantitative analysis showed that the number of bacteria in soil surface (in the depth of 10 cm) was significantly related to soil respiration (P<0.01), it could explain 80.8% and 65.4% of soil respiration in A. halodendron and bare land, respectively.

Key words: Artemisia halodendron, bare land in dune, soil respiration rate, influencing factors

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