2种水土保持灌木的根系数量特征研究  

Quantity Characteristics of Root System of Two Shrubs for Soil and Water Conservation in Waste Dump

作　　者：马红燕[1] 格日乐[1] 赵杏花[1] 斯琴[1] 刘俊宇[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《水土保持通报》2013年第2期165-168,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"准格尔露天煤矿排土场水土保持功能植被固土抗蚀生物力学响应机制"(41161046);内蒙古农业大学科技创新团队资助计划(NDTD2010-11)

摘　　要：以内蒙古自治区准格尔煤田黑岱沟露天矿排土场2种人工栽植的4龄水土保持灌木柠条和沙棘的根系为对象,通过研究根系数量特征,确定其代表根,为2种灌木根系的生物力学性质和抗蚀研究提供了基础数据和相关参数。代表根的确定将根系以0.5mm为1个径级进行分级,计算每个径级组的累计根数量、累计根长、累计根表面积和累计根干重等4个方面,取这4个值百分比相对较大的径级组作为各自的代表根。结果表明:柠条代表根径级为0～0.5mm,0.5～1mm,1～1.5mm;沙棘代表根径级是0.5～1mm和1～1.5mm。在根系固土抗蚀生物力学性质的研究中,建议在内蒙古准格尔露天矿排土场及相似地区柠条和沙棘2种水土保持灌木主要研究的根茎范围以其代表根径级为主要研究范围。The roots of two kinds of 4 years old shrubs （Caragana microphylla Lam. and Hippophae rhamnoides Linn. ）, which was artificially planted for soil and water conservation, were studied in the waste dump of Strip Mine in Heidaigou. The roots quantity characteristics were examined. In addition, the biomechanical properties and corrosion studies were conducted on their representative roots to provide basic data and related parameters. The representative roots were selected according to the following procedures.. （1） The root systems were divided into groups by an interval of 0.5 ram; （2） The total root number, root length, surface area and dry weight were recorded and calculated for each group; （3） The representative roots were then se- lected as the group that had relatively high values in terms of the four parameters. The result showed that the representative roots levels were 0-0.5 mm, 0.5-1 mm, 1-1.5 mm for Caragana rnicrophylla Lain; and 0.5-1 mm and 1-1.5 mm for Hippophae rhamnoides Linn, respectively. It is suggested that the representative roots should be considered only if these two kinds of shrubs were studied in waste dump of Strip Mine in Heidaigou and other similar areas.

关 键 词：排土场 灌木 代表根 径级 

分 类 号：Q944.54[生物学—植物学]