%0 Journal Article
%T Soil nitrogen mineralization under different land use patterns in Xishuangbanna<br>西双版纳不同土地利用方式下土壤氮矿化作用研究
%A LI Mingrui
%A SHA Liqing
%A <br>李明锐
%A 沙丽清
%J 应用生态学报
%D 2005
%I 
%X Nitrogen (N) cycle is very important for forest ecosystem, and soil N mineralization rate is often used as the index of soil N availability and its losses. Using Close-Top incubation method, we measured the N mineralization rate in soils (0-15 cm) of monsoon evergreen broadleaf forest, seasonal rain forest, rubber plantation, heavily disturbed seasonal rain forest, Millettia laptobotrya secondary forest and upland rice field. The results showed that the net N mineralization rate and N nitrification rate were decreased in the sequence of heavily disturbed seasonal rain forest > Millettia laptobotrya secondary forest > seasonal rain forest > monsoon evergreen broadleaf forest > rubber plantation > upland rice field. Rubber plantation and upland rice field were the most seriously disturbed land use patterns. Their soil N storage and mineralization rate were very low and exhibited significant variations, compared with other land use patterns. Lower net N mineralization rate correlated with lower N storage, and also, with lower fungi numbers. The N mineralization rate in disturbed forest soil which had recovered for several years was similar to that in primary forest soil, but decreased significantly when the forests were converted to agricultural land.
%K Nitrogen mineralization
%K Land use pattern
%K Human disturbance<br>氮矿化
%K 土地利用方式
%K 人为干扰
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=58D13B5E97FF3A89&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=CA4FD0336C81A37A&sid=318E4CC20AED4940&eid=9FFCC7AF50CAEBF7&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=11&reference_num=25