干旱半干旱地区城市单位附属绿地绿化结构——以神东矿区为例

调查了神府东胜矿区23个绿地42种8464株树木,并对其绿化结构作了分析。结果表明:(1)神东矿区单位附属绿地42种树木中落叶阔叶乔木树种20种,常绿针叶树6种,花灌木16种,树种以新疆杨、垂柳、国槐、圆柏和玫瑰、紫丁香为主,种类和株数最多的样地是上湾煤矿;(2)神东矿区绿地以小树为主,树高小于10m的树占67．92％,胸径小于10cm的占52．86％;(3)绿化覆盖率和密度均较低,平均值分别为16．54m~2、9．09株/100m~2,绿化覆盖率最高的样地是大柳塔煤矿居住区,上湾小学绿地密度最大,为36．27株/100m~2,神东公司等单位的生活小区绿地密度普遍不高(4)树种整体生长良好,平均健康等级为0．82,神东公司等单位的生活小区绿地树木生长较机关单位绿地差;(5)单位面积绿地绿量较小,平均值只有10．91m~2/m~2,且机关单位绿量较职工生活区大,其中上湾小学最大,为206．84m~2/m~2。

Structure of Campus Greening for Institutions in Arid and Semi-Arid Cities——An Eexample of Shendong Mining Area

A total number of 8464 trees belonging to 42 species growing at 23 green-land sites were investigated to analyze the structures of the green-lands. The results showed that:(1)In campuses of institutions in Shendong Mining Area,a total number of 42 tree species were found, 20 species of which were deciduous broad- leaved arbor trees,6 species were evergreen coniferous trees and 16 species were shrubs,the dominant species were Populus alba var.pyramidalis,Salix babylonica, Sophora japonica,Sabina chinensis,Rosa rugosa and Syringa oblata.The largest number of species and the largest number of trees were found in Shangwan Coal Mine;(2)Small trees were dominant in campus green-lands in Shendong Mining Area,and trees with a height below 10m accounted for 67.92%,and a DBH below 10cm accounted for 52.86% of the total number;(3)Both vegetation coverage and stocking density were low,the average values were 16.54m~2 and 9.09/100m~2 respectively.Residential area of Daliuta Coal Mine was the greatest in vegetation coverage.Shangwan Elementary School was the greatest in stocking density,with a value of 36.27/100m~2,and the residence areas of Shendong Company were the lowest;(4)All trees generally had good growth,the average health grade of all trees was 0.82.The growth of trees was poorer in the residence area of Shendong Company than in the green-land of the office areas; (5)Average proportion of green land was low,only 10.91m~2 green land per unit construction area.The proportion was larger in office area than in residence area. Shangwan Elementary School had the largest proportion of green land,about 206.84 m~2 per unit construction area.