黄土高原丘陵沟壑区退耕还林生态效应评价_贾晓娟.pdfVIP

DOI :10.13961/j.cnki .stbctb.2008.03.042 28 3 Vol.28, No.3 2008 6 Bulletin of Soil and Water Conservation Jun., 2008 　 贾晓娟, 常庆瑞, 薛阿亮, 蔚 霖, 王德彩 ( , 712100) 　: 1986, 2003 , , 。(1)1986—2003 , 。、, , , 63. % 。(2) 0.07 0.747, 。, , 0.0 8 0.368, , 。 :;; :A 　　　　　:1000—288X(2008)03—0182—04 　　 :S1 7.2 Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region JIA Xiao-juan, CHANG Qing-rui, XUE A-liang, YU Lin, WANG De-cai (College of Resources and Environmental Science, Northetwest A F University, Yang ling, Shaanxi 71200, China) Abstract:Based on landuse change data obtained from TM images in 1986 and 2003 and the relative ecological values of corresponding landuse types, w e evaluated ecological effects of returning farmland to forest or grass land in Wuqi County .Results show that landuse types in the county w ere in a significant change during 1986 -2003.The total area of w oodland and grassland has increased greatly w hile the area of farmland and unused land has significantly reduced.There w as 63. %of farmland transferred into w oodland and grassland.Eco- logical environment has been significantly improved and overall environmental quality has been remarkably improved.Ecological contribution rate of returning farmland to forest is 40.96%.Projects of returning farm- land to forest land in Wuqi County have achieved success and brought w onderful ecological effects. Keywords:Wuqi County;returning farmland to forest land;ecological effect evaluation 　　 , , 、 , [1— ] [6] , 。 , ,。 , [1, 3—4] 、