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| Soil seed bank of Robinia pseudoacacia and Quercus variabilis with different stand ages |
| Chen Zhen1, Zhao Yong1, Wu Mingzuo1, Wang Qian1, Tian Xiangyu1, Fan Wei2 |
| 1.Henan Agricultural University，450002；2.Henan Academy of Forestry Science，450003：Zhengzhou，China |
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Abstract In hilly area in Taihang Mountains, two arbor communities, Robinia pseudoacacia and Quercus variabilis, were taken as objects to reveal the role of soil seed bank in vegetation recovery. We studied the composition and diversity characteristics of soil seed bank with different stand ages. The relationships between soil seed bank and aboveground vegetation were also analyzed. Results showed that Asteraceae and Poaceae families largely distributed in herb layer; the maximum overground species, was Robinia pseudoacacia(30a) coummnity family and genera, and the minimum species was Quercus variabilis(20a), and increasing with growing year. Perennial herb was the major life form for Robinia pseudoacacia(10, 20, 30a) and Quercus variabilis(20, 30, 40a), and the similarity coefficient of community was 0-1.0. 2)Rutaceae and Gramineae occupied large proportion in each community soil seed bank, and their soil seed bank density raised over stand age. Robinia pseudoacacia soil seed bank diversity increased, but Quercus variabilis decreased over stand age. 3)In soil seed bank, the amount of family and genera were lower than those overground with different species. Soil seed bank had seldom contribution to overgroud vegetation restoration.
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Received: 02 September 2010
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