浑善达克沙地桑根达来古榆树调查研究

THE ANCIENT ELM INVESTIGATION OF SANGGENDALAI OF HUNSHANDAKE SANDY LAND

榆树疏林草原是浑善达克沙地上的1种原始自然景观,被认为是最稳定的植被类型。我们把胸径大于50cm的榆树定义为古榆树,古榆树是榆树疏林草原发挥生态效益的典型代表,2009年5月～8月在浑善达克沙地正蓝旗桑根达来镇境内用样方法对宝绍代苏木安夏日嘎查、额木格德苏木白音胡舒嘎查等8个区域对胸径大于50cm的榆树进行实地调查,用Excel对数据进行统计分析。通过分析可知:(1)该区共有古榆树308株,分布最多地区为100株,最少为1株。(2)该区古榆树的胸径分布于50cm～130cm,集中分布于50cm～55cm,株数与胸径关系呈反"J"型分布。(3)株高分布于6m～18m,集中分布于10m～12m,株数与株高关系呈正态分布。(4)长势中等偏上,死亡植株与患病植株较少。

Elm woodland grassland is a primitive natural landscape in the Hunshadake sandy land,which is considered the most stable vegetation type.Ancient elm is the typical of ecological benefits in the Ulmus woodland grassland.We have selected eight regional field which includes BaoShaodai and GaoGesitai and so on within the sampling method used on behalf and chose the ancient elm such as greater than 50cm diameter,then using Excel for statistical analysis.The analysis showed：（1）The number of ancient elm in this area is 308,the most one is 100 and the least one is 1.（2） the diameter of ancient elms distributed in the 50cm～130cm and centrally located in the 50cm～55cm,the relationship between number of trees with diameter was anti＂J＂ type distribution.（3） the height of ancient elms distributed in the 6m～18m and mainly distributed in 10m～12m,the relationship between the number of plant and plant height were normal relations.（4）Most plants are in the middle life force.The ancient elm resources overall are doing well and will continue to play strong effects of wind prevention in the longer period.