关键词: 采伐迹地, 土壤可溶性有机碳、氮, 微生物生物量, 树种, 杉木

Abstract: Investigations were made in the sampling plots COvering 243 km of the Shenyang urban area，and the results were used as the input for the Urban Forest Management Information System (UFMIS)，which was developed
based on the model of CITYgreen．W ith this system ，and using tree species ，tree density，tree height grade distribution，tree DBH (diameter at breast height)grade distribution，and tree health condition as parameters，the land
use and forest structure in Shenyang City were analyzed．It was found that there were 1 914 500 trees in Shenyang,belonging to 136 species． The 25 dom inant species accounted for 84．78％ of the total number of
trees．an d the forest coverage Was 9．765％ ．Trees with DBH < 0．25m and > 0．5m accounted for 82．8％ of the total。and the young，m iddle-aged and old trees occupied 27％ ，58％ and 15％ of the total，respectively． The
healthy status of 84％ of the trees Was above middle leve1．Therefore，the forest in．Shenyang urban is at fl stable stage．According tO the statistical results from UFM IS，the ecological value of forest in Shenyang urban is as high
as 26 526 955．1 USD in term s of economy．

Key words: Cunninghamia lanceolata, cut-over land, soil dissolved organic carbon and nitrogen, soil microbial biomass, tree species.