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Bulletin of Botanical Research ›› 2017, Vol. 37 ›› Issue (1): 109-117.doi: 10.7525/j.issn.1673-5102.2017.01.015

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Basic Characteristics of Soil Seed Bank of Haloxylon ammodendron in Junggar Basin

LÜ Chao-Yan1,2, ZHANG Xi-Ming2, GAO Zhi-Xi1, XIONG Bai-Lian3, HAN Chang1, WANG Jia-Zhen1   

  1. 1. Department of Biological and Agricultural Technology, Zunyi Normal College, Zunyi 563006;
    2. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011;
    3. Department of Resources and Environment, Zunyi Normal College, Zunyi 563006
  • Received:2016-08-30 Online:2017-01-15 Published:2017-03-06
  • Supported by:
    Natural Science Fund Project of Guizhou Provincial Department of Education(Qianjiaohe KY Zi[2015]409);Zunyi Normal Colledge Ph.D. Fund Project(Zunshi BS[2014]17);National Nature Science Fund Project(30870472);High-level Innovative Talents Training Project of Guizhou Province(Zunshikeherencai[2016]3)

Abstract: Soil seed bank is the refuge of seed and the basis of vegetation regeneration and recovery in arid desert region. Haloxylon ammodendron-based desert vegetation is the important ecological barrier of Junggar Basin's oasis area, however, the researches of soil seed bank characteristics which are closely related to population regeneration of H.ammodendron are relatively lacking. Basic characteristics of the soil seed bank of H.ammodendron in Junggar Basin were researched by field sampling,physical screening and laboratory experimenting. The results showed that:(1)The soil seed bank densities of H.ammodendron populations varied from 71 to 696 seed·m-2, especially in some local environments it reached 7 534 seed·m-2. (2)The coefficient of variation analysis identified that the coefficients of variation of the soil seed bank density were more than 1. It meant that the quantitative distribution of soil seed bank was very uneven. (3)The seed germination rates in the soil seed banks varied from 2.08% to 47.62% and the average was approximately 18%. (4)The analysis of variogram indicated that there were obvious differences in the spatial distribution of seeds in the soil seed bank of H.ammodendron populations. In summary, the characteristics of high density, germination ability and spatial variability would effect on the distribution pattern and regeneration of H.ammodendron populations.

Key words: Haloxylon ammodendron, population, soil seed bank density, seed germination, spatial distribution, Junggar Basin

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