%0 Journal Article
%T The Research on Soil Germplasm Resource Distribution in Different Periods of Water Degeneration in the North Temperate Zone Wetland<br>北温带湿地不同退水时间土壤种质资源结构及分布格局
%A DANG Lixia
%A HONG Jianming
%A <br>党丽霞
%A 洪剑明
%J 资源科学
%D 2009
%I 
%X Wetland is the unique ecosystem formed by water and land. However, the exploitation of wetland for human activities such as tourism largely reduced the area of wetland in China. Therefore, more researchers nowadays focus on the topic of wetland protection, due to its various ecological functions, for example, improving the climate and cleansing contaminated rivers. The distribution of soil germplasm resource in different periods of water degeneration is studied in this paper, and the research results may play an active role in the protection and management of the Yayahu wetland. Germination tests of three stages are used to evaluate the traits in different periods of water degeneration, mainly community structure, of the soil Germplasm Resource of Yeyahu wetland during the past ten years. The construction indicates that during different periods of water degeneration, the soil germplasm resource changes obviously. The density of germplasm resource reached the maximum of 2.389×104 ind./m2 after 5 to 7 years of degeneration, while the minimum density of 1.352×104 ind. /m2 is reached after 7 to10 years of degeneration. The same result is found about the number of the vegetation species in the different periods. But different kinds of vegetation species vary in results, and compared with other periods: 1) the amount of hygrophyte reaches the peak after 1 to 3 years of degeneration; 2) The amount of vegetation in extensive distribution reaches the record high after 5 to 7 years of degeneration. There are no significant differences in the number of species between soil depth ranges of 0-5 cm and 5-10 cm, but the differences in germination amount of different species are obvious. According to the research results of Yeyahu wetland soil germplasm resource distribution pattern, we reached below conclusions. First, the reason for the difference in soil germplasm is multifold, including the life-span of the seeds and the activity of the seeds in different period of water degenerations. However, the most important factor is the composition of the water. Second, the soil germplasm resource plays a significant role in the process of wetland restoration and protection.
%K North Temperate Zone
%K Soil
%K Germplasm resource
%K Yeyahu wetland
%K Wetland restoration<br>北温带
%K 土壤
%K 种质资源
%K 分布格局
%K 野鸭湖
%K 湿地
%K 湿地恢复
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=9F44D8DC687E121A7C133F13574BB1CC&yid=DE12191FBD62783C&vid=4AD960B5AD2D111A&iid=DF92D298D3FF1E6E&sid=3559FBE006544B4B&eid=0522AC581E488FBF&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=0