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  • ISSN 1000-694X
  • Bimonthly 1981
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Dynamics of Aboveground Biomass and Litters in Different Types of Dunes under Vegetation Restoration Processes in the Horqin Sandy Land

  • Luo Yongqing ,
  • Zhao Xueyong ,
  • Ding Jieping ,
  • Feng Jing ,
  • Su Na ,
  • Zhou Xin ,
  • Yue Xiangfei
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  • 1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Gansu Academy of Environmental Sciences, Lanzhou 730020, China;
    3. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China

Received date: 2014-11-27

  Revised date: 2015-02-06

  Online published: 2016-01-20

Abstract

Plant growth, death and decomposition is an important process for matter exchange between plant and soil in sandy land ecosystems. In this study, we focused on 3 different habitats in the Houqin Sandy Land restoration in terms on mobile dune, fixed dune and grassland. Vegetation character, aboveground biomass and litter mass were investigated monthly during the growing season (April to September) from 2009 to 2011. Meanwhile seasonal variation and dynamics of abovrground biomasses and litters were analyzed among sandy land restoration. The results showed: 1) Vegetation character in 3 habitants differed significantly, vegetation coverage, aboveground biomass and plant density were all followed the order grassland > fixed dune > mobile dune. (2) Aboveground biomass in 3 biotopes all showed a seasonal variation of unimodal curve during the 3 growing seasons. Top biomass in grassland occurred in July of 2009 and August of 2010 and 2011, which ranged from 163.71 g·m-2 to 247.64 g·m-2. Top biomass in fixed dune occurred all in July during 3 growing seasons and which was 96.13 g·m-2, 96.02 g·m-2 and 102.74 g·m-2 in 2009, 2010 and 2011 respectively. In mobile dune, top biomass ranged from 17.48 g·m-2 to 20.10 g·m-2 and which occurred in September of 2011 and July of 2009 and 2010. (3) Highest monthly mass of litter was 21.0 g·m-2, 267.6 g·m-2 and 370.1 g·m-2 in mobile dune, fixed dune and grassland, respectively. Ratio of shoot in litter was higher than leaf and necromass in grassland and fixed dune, however, which is low in mobile dune. Meanwhile seasonal dynamics for litters in all biotopes were inverse with aboveground biomass.

Cite this article

Luo Yongqing , Zhao Xueyong , Ding Jieping , Feng Jing , Su Na , Zhou Xin , Yue Xiangfei . Dynamics of Aboveground Biomass and Litters in Different Types of Dunes under Vegetation Restoration Processes in the Horqin Sandy Land[J]. Journal of Desert Research, 2016 , 36(1) : 78 -84 . DOI: 10.7522/j.issn.1000-694X.2015.00027

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