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Studies on Characteristics of Soil Seed Bank of Pedicularis verticilata Community

  • 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. Xinjiang Branch of Chinese Academy of Sciences, Urumqi 830011, China;
    3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2010-05-18

  Revised date: 2010-08-24

  Online published: 2011-01-30


Pedicularis verticilata has already become an intrusion species on Bayanbulak grassland with the biological characteristics of small and excessive seed. In order to control its expansion effectively, the distribution characteristics and the relation with habitats of P. verticilata were studied by field vegetable investigation and laboratory testing analysis. We studied the characteristics of horizontal distribution on soil moisture gradient and the characteristics of vertical distribution under the conditions of different soil types by counting method. Constant temperature and varying temperature treatment methods were used from laboratory germination, P.verticilata’s seed germination response to temperature was analyzed. Correlation analysis was used to analyze the relationship between P. verticilata’s seed bank and plant diversity and other soil factors. The result shows that: 1) Soil water content is the main influencing factor for P. verticilata seed’s horizontal distribution. The order of vertical distribution of the seed is litter layer>humus layer>subsoil layer, the amount of seed difference was remarkable between each layer. 2) The amount of seed has a significant positive correlation with P. verticilata’s density and coverage, but has little correlation with other plants. 3) Regarding reproduction and growth, soil water content is the limiting factor. The number of inflorescence and the amount of seed reached maximum when soil water content is 0.25, and no seed will be reproduced seed when soil water content exceeded P. verticilata’s tolerance limitation. Varying temperature is propitious to seed germination, the last ten-day of May and the first ten-day of June were the optimum period of germination, the germination rate reached to 76.9% and 72.4%. 4) Soil organic matter is another main influencing factor for the growth and reproduction of P. verticilata, the correlation coefficient is 0.970 (p<0.01).

Cite this article

LIU Yan-yan, HU Yu-kun, WANG Xin, GONG Yan-ming, LI Kai-hui . Studies on Characteristics of Soil Seed Bank of Pedicularis verticilata Community[J]. JOURNAL OF NATURAL RESOURCES, 2011 , 26(1) : 48 -57 . DOI: 10.11849/zrzyxb.2011.01.005


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