%0 Journal Article
%T Study on land use change and ecological effect in Tailan River watershed in recent 15 years<br>近15年台兰河流域土地利用变化及其生态效应研究
%A PENG Dong-mei
%A ZHAO Cheng-yi
%A SUN Dong-yuan
%A YAN Ying-yu
%A LI Ju-yan
%A WEI Heng
%A LI Zi-liang
%A <br>彭冬梅
%A 赵成义
%A 孙栋元
%A 闫映宇
%A 李菊艳
%A 魏 恒
%A 李子良
%J 土壤
%D 2010
%I 
%X TM remote data in 1990, 2000 and 2005 were used to explore land use type changes from 1990 to 2005 in Tailan River watershed using GIS. The results indicated that the areas of cropland and sandy land increased by 3.50×104 hm2 and 2.05×104 hm2 respectively while grassland area decreased by 1.43×104 hm2, suggesting the great reclamation over the past years. Five sites with similar natural conditions but different land uses were selected for comparing soil properties, soil organic matter (SOM) and total salt decreased sharply with soil depth, and the effects of land use type on SOM and total salt occurred mainly within 0 - 25 cm depth. The total salt of croped glycyrrhiza land and saline-alkali land were greatly higher than those of the other land use types. SOM contents in topsoils of land use types followed an order of economic forest > farmland > croped glycyrrhiza land > ameliorated sandy land > saline-alkali land. In addition, total salt decreased while SOM increased with the years of farming.
%K Land use change
%K Ecological effect
%K Soil quality
%K Tailan River watershed<br>土地利用变化
%K 生态效应
%K 土壤质量
%K 台兰河流域
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=56F69E970C6E5190CDB409D28DD0E3C6&aid=18FF5397A3201AEB10FE327AA01F0D51&yid=140ECF96957D60B2&vid=ECE8E54D6034F642&iid=CA4FD0336C81A37A&sid=58F693790F887B3B&eid=A8DE7703CC9E390F&journal_id=0253-9829&journal_name=土壤&referenced_num=1&reference_num=12