【作者】 李钢铁； 姚云峰； 左合君；

【Author】 LI Gangtie1,2,YAO YUNfeng1,ZUO Hejun1 (1Inner Mongolia Agricultural University, Hohhot.010019;2Biejing Forestry University,Beijing,100083 )

【机构】 内蒙古农业大学；

【摘要】 本文以浑善达克沙地沙地榆(Ulmus pumila L.var.sabulosa J.H.Guo)为研究对象,把沙地榆生境划分六种立地类型,使用野外调查法,对沙地榆(Ulmus pumila L.var.sabulosa J.H.Guo)的生长与立地关系进行分析。结果表明:在调查样带六种立地类型上榆树的密度和盖度分别是丘间低地4.9株/hm2和2﹪;迎风坡中部7.6株/hm2和3﹪;迎风坡下部9株/hm2和4﹪;背风坡下部9.4株/hm2和4.8﹪;丘顶13株/hm2和5﹪;背风坡中部17株/hm2和5.8﹪。六种立地类型中以基径为指标,比较榆树生长状况为丘间地>迎风坡中部>迎风坡下部>丘顶>背风坡下部>背风坡中部;丘间地榆树平均基径最大,达到29.11㎝;背风坡下部榆树平均基径最小,只有21.7㎝。更多还原

【Abstract】 According to the research purpose and the actual situation, Ulmus pumila L.var.sabulosa J.H.Guo ,s living habitat were divided into 6 site types, using Transect Investigation method study the 6site types. Used SAS、Excel to study and Comparative analysis. The results showed that : the Middle Part of leeward, which occupies area is the smallest; the density and coverage of Ulmus pumila L.var.sabulosa J.H.Guo is the highest respective l7 shoots/hm2 and 5.8% low land coverage is the smallest; the density and coverage of Ulmus pumila L.var. sabulosa J.H. Guo is the lowest; only 4.9shoots/hm2 and 2%;the density and coverage of Ulmus pumila L.var.sabulosa J.H.Guo in lower part of upwind slope、Middle Part of upwind、slope up-dune and lower partof leeward are respectively 9 shoots/hm2、4﹪;7.6 shoots /hm2、3﹪;13 shoots /hm2、5﹪;9.4 shoots /hm2、4.8﹪.Ulmus pumila L.var.sabulosa J.H.Guo ,s growth status of lowland is the best and its basic diameter is the biggest. the basic diameter up to 29.11 .the lower part of leeward Growth Status is the poorest, the basic diameter is smallest ,it is 21.7 .更多还原