燕山西部山地灌木群落凋落物积累量及其持水性能研究  

Water Holding Properties and Stocks of Litters in the Shrub Vegetations in West Region of YanShan Mountain

作　　者：李倩茹[1] 许中旗[1] 许晴[1] 黄选瑞[1] 纪晓林[2] 张兴锐[1] 习常新 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省木兰围场国有林场管理局,河北围场068400

出　　处：《水土保持学报》2009年第2期75-78,共4页Journal of Soil and Water Conservation

基　　金：国家“十一五”科技支撑项目(2006BAD03A11);河北农业大学博士基金;国家自然科学基金项目(30571489)

摘　　要：对燕山西部山地常见的榛子灌丛和绣线菊灌丛两种灌木群落凋落物的积累量及其持水性能进行了研究。结果表明,榛子灌丛和绣线菊灌丛凋落物的积累量明显低于两种乔木林-白桦林和落叶松林,榛子灌丛又明显高于绣线菊灌丛;封育有利于提高绣线菊灌丛凋落物的积累量。凋落物最大持水率由高到低的顺序依次为:榛子灌丛(311.91%)>落叶松林(288.54%)>白桦林(232.89%)>绣线菊灌丛(包括封育与未封育)(156.84%和155.44%)。不同群落类型凋落物吸水速率与吸水时间之间可以用幂函数关系进行描述。榛子灌丛凋落物初始吸水速率最大,其次为白桦林和落叶松林,绣线菊灌丛最低。两种灌木群落凋落物的持水量明显低于白桦林和落叶松林,榛子灌丛又明显高于绣线菊灌丛。两种绣线菊灌丛凋落物持水量极低,但封育可以明显提高凋落物的持水量。The existing amount and water holding properties of litters in two types of shrub vegetations（including Spiraea pubescens shrub and Corylus heterophylla shrub） in west region of Yanshan mountain were studied in the paper. The results show that the litters stock of two shrub vegetation was lower than two types of forests（including birch forest and larch forest） and that of Corylus heterophylla shrub was higher than Spiraea pubescens shrub. The closure could lead to the increase of litters stock. The order of most water holding rate in descending was Corylus heterophylla shrub（311.91%）〉 birch forest （288.54 %）〉 larch forest（232.89%）〉Spiraea pubescens shrub（156.84% and 155.44%, including closure part and non-closure part）. The relation between the water absorption rate of litter and the immersed time could be described by power function, and the initial water absorption rate of litter of Corylus heterophylla shrub is biggest, followed birch forest and larch forest, and the last is Spiraea pubescens shrub. For the water holding capacity of litters, two types of shrub vegetation were lower than the larch forest and birch forest and Corylus heterophylla shrub was higher than Spiraea pubescens shrub. The water capacity of litters in two kinds of Spiraea pubescens shrubs was very slow, and closure could increase it markedly.

关 键 词：灌木群落 凋落物累积量 持水率 持水量 

分 类 号：S714.7[农业科学—林学]