| Quantitative characteristics and germination dynamic variation of soil seed bank during the course of restoration at Loess gully region |
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| DOI：10.7606/j.issn.1000-7601.2009.02.44 |
| Key Words: vegetation restoration years soil seed bank seed germination quantitative characteristics germination dynamic variation |
| Author Name | Affiliation | | GUO Man | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau Institute of Soil and Water Conservation CAS ＆ MWR,Yangling,Shaanxi 712100,China | | ZHENG Fenli | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau Institute of Soil and Water Conservation CAS ＆ MWR,Yangling,Shaanxi 712100,China | | AN Shaoshan | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau Institute of Soil and Water Conservation CAS ＆ MWR,Yangling,Shaanxi 712100,China | | LIU Yu | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau Institute of Soil and Water Conservation CAS ＆ MWR,Yangling,Shaanxi 712100,China | | BAI Wenjuan | State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau Institute of Soil and Water Conservation CAS ＆ MWR,Yangling,Shaanxi 712100,China |
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| Abstract: |
| Taking the pasture zone of Loess gully region (Guyuan Area of Ningxia Hui Municipality) as a case study, this paper selected eight research sites according to the different vegetation restoration years (2, 5, 12, 24, 35, 55, 75 a and cropland control) to study quantitative characteristics and dynamic change of soil seed bank germination through field survey and a laboratory experiment of seed germination.The research results showed at the different vegetation restoration years, average amount of seed sprout was 3 542.5 seeds/m2, and the amount of discotyledon vegetation accounted for 90% of the total.The seed sprout amount in 0～5 cm soil layer varied 166.7 to 9 100.0 seeds/m2 and in 5～10 cm soil layer changed 133.3 to 2 120.0 seeds/m2.At the different restoration years, an order of seed germination amount was increase before and decreases after;the temporal pattern of seed germination amount was approximate unimodal.Except cropland, the peak value of seed germination for dicotyledon appeared in 4 to 6 weeks;the peak value of seed germination for monocotyledon occurred in 5 to 6 weeks.This show that seed in the soil come into being a peak value of germination under the appropriate condition of environment, climate and so on in the pasture zone of Loess gully region. |
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