石羊河中游荒漠区天然柠条林种群特征研究  

Study on Population Characteristic of Natural Caragam korshinkii in Desert Area of Middle Reaches of Shiyang River

作　　者：赵倩云[1,2] 李学敏[3] 王辉[1] 张国中[3] 袁宏波[3] 张晓磊[1] 

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]民勤县林业局,甘肃民勤733300 [3]甘肃省治沙研究所,甘肃兰州730070

出　　处：《甘肃林业科技》2012年第4期13-16,共4页Journal of Gansu Forestry Science and Technology

基　　金：甘肃省自然科学基金项目096RJZH015资金资助

摘　　要：以地处典型荒漠地区的石羊河中游的2个天然柠条林种群为研究对象,调查柠条种群分布、密度、盖度等特征,分析2分布区柠条种群空间分布格局。结果表明:石羊河中游2分布区天然柠条种群空间分布均为聚集分布类型,但聚集度存在一定差异;红敖包和阿拉古山天然柠条林种群密度相差不明显;2地天然柠条林的平均地径也相差甚微。通过方差分析法分析差异都不是很明显;2个柠条种群分枝数和新梢长度差异显著,红敖包柠条林的新梢长度明显大于阿拉古山,而分枝数相反;种群结构大小的调查显示,2个天然林都处于增长阶段。Two natural Caragama korshinkii forests in typical desert area of middle reaches of Shiyang river were selected to investigate their population distribution, density and coverage etc. and analyze the spatial distribution patterns. The result showed that the spatial distribution of natural Caragama korshinkii populations in the two areas was congregating distribution types, but the aggregated degree was lation density and mean ground diameter of the two natural different. There was no significant difference in popukorshinkii forests in ttongaobao and Alagushan. There existed significant differences in branch number and new shoot length. The new shoots of Caragama korshinkii in Hongaobao were obviously longer than that of Alagushan, tigation of the population structures revealed that the two but the number of branches was the opposite. The invesnatural Caragama korshinkii forests were in growing stage.

关 键 词：柠条 分布格局 年龄结构 石羊河中游 

分 类 号：S718.542[农业科学—林学]