%0 Journal Article
%T PATTERN AND CHANGE OF BLACK SOIL RESOURCES IN CHINA<br>中国黑土资源分布格局与动态分析
%A CUI Hai-shan
%A ZHANG Bai
%A YU Lei
%A ZHU Jin-hua
%A HE Yan-fen
%A <br>崔海山、张柏、于磊、朱金花、何艳芬
%J 资源科学
%D 2003
%I 
%X Black soil is famous for its high fertility of soil, which is especially important for agricultural development. It is significant to understand pattern and change of black soil for sustainable use of black soil resources. This paper analyses the distribution pattern of black soil resources according to viewpoint of geo-pedology and the distribute of seasonal frozen soil layer in the Songnen plain. Firstly, the close relation between the special forming course and the properties of black soil and frozen layer is analyzed, furthermore, according to the relation formula of annual average temperature at seasonal frozen layer bottom and upper earth, the necessary temperature making black soil develop is obtained. The results indicate that black soil is sure to develop on long-term steady or steady seasonal frozen layer, which is a proof that seasonal frozen layer distribution dominates black soil distribution along latitude. Secondly, the landforms characteristics of black soil at geological historical period is researched, which are vital factors for black soil distribution along longitude. The paper also discusses the change of black soil resources' quantity and quality: It indicates that occupying cultivated land and soil erosion are the leading factors of quantity change for black soil resources; the quality change of black soil resources is an integrated result brought about by natural and human activities factors, the former includes seasonal frozen layer moving northward, rainfall eroding soil, and special topography, landforms, etc., and the latter involves irrational land use and abusing chemical fertilizer and pesticide. Research results show that physical and chemical properties of black soil have been getting deterioration, moreover, severe soil degradation have occurred.
%K Black soil
%K Pattern
%K Seasonal-frozen layer
%K Geopedology
%K Dynamic change<br>黑土资源、分布格局、季节冻层、土壤地质学、动态变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=F1ED79FB76BF767A&yid=D43C4A19B2EE3C0A&vid=C5154311167311FE&iid=38B194292C032A66&sid=0401E2DB1F51F8DE&eid=68D88C2FCF9C3098&journal_id=1007-7588&journal_name=资源科学&referenced_num=15&reference_num=12