%0 Journal Article
%T Soil Organic Matter Changes of Turnover Ecosystems Traced by Stable Carbon Isotopes<br>稳定碳同位素示踪农林生态转换系统中土壤有机质的含量变化
%A Liu Qiming
%A Wang Shijie
%A Piao Hechun
%A Ouyang Ziyuan
%A <br>刘启明
%A 王世杰
%A 朴河春
%A 欧阳自远
%J 环境科学
%D 2002
%I 
%X On the basis of different photosynthetic pathway, there's obvious difference in delta 13C values between C3 plants and C4 plants. Use this characteristic, the organic carbon content (forest lands: 1.81%-16.00%; farms: 0.43%-2.22%) and delta 13C values (forest lands: -23.86@1000(-)-27.12@1000; farms: -19.66@1000(-)-23.26@1000) of three profile soil samples either in farms and forest lands near Maolan Karst virgin forest was analyzed, there plant C3 plants previously and plant C4 plants now. Results show that clearing forest have accelerated the decompose rate of soil organic matter and decreased the proportion of active-component in soil organic matter, reducing of soil fertility.
%K 生态系统
%K 土壤有机质
%K δ13C值
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=5DC4325004810E8E&yid=C3ACC247184A22C1&vid=EA389574707BDED3&iid=38B194292C032A66&sid=80A07035DF96B0C4&eid=46CB27789995047D&journal_id=0250-3301&journal_name=环境科学&referenced_num=16&reference_num=15