| Studies on characteristics of soil seed banks in natural vegetation restoration of the Loess hilly gully regions |
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| DOI：10.7606/j.issn.1000-7601.2009.06.41 |
| Key Words: soil seed bank vegetation restoration Loess hilly gully region |
| Author Name | Affiliation | | YUAN Baoni | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China | | LI Dengwu | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China | | LI Jingxia | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China | | WANG Dongmei | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China | | XUE Ling | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China | | LIU Jie | College of Forestry Northwest A＆F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Field survey and laboratory experiment were conducted to study the characteristics of soil seed bank,such as species composition,density,diversity and similarity in the natural vegetation restoration of loess hilly gully regions.The results showed that 2203 seedlings of 55 species,which belonged to 23 families and 48 genera,germinated in the 10 plots.The total seed density reached 5 505±625.537 grains/m2,approximately 4.6 times bigger in 0～5 cm than in 5～10 cm soil layer.The richness,diversity and evenness of soil seed bank did not achieve the remarkable related level with the restored age,but the ecological dominance increased while recovered years increased,and it took a more significant increasing trend in sunny slope than in shady slope.The similarity coefficients of soil seed bank composition ranged from 0.0952 to 0.7143,and the similarity coefficients got smaller with the increase of recovered years,which showed hat the vegetation succession of the abandoned cropland was basically an enlarging process of spatial heterogeneity. |
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