冀西北坡位对油松林枯落物持水性能的影响  

Effect of Slope Position on Water-holding Characteristics of Litter in Pinus tabulaeformis Forest in Northwest Hebei

作　　者：梁世兴 孟祥嵩 刘海翔 杨新兵[2] 郭建军 Liang Shixing;Meng Xiangsong;Liu Haixiang;Yang Xinbing;Guo Jianjun(Zhuolu Forest Farm of Zhangjiakou,Zhangjiakou 075600,Hebei;College of Forestry,Hebei Agricultural University,Baoding 071000,Hebei;Saibei Forest Farm of Zhangjiakou City(State-owned Forest Farm Administration Office of Zhangjiakou City),Zhangjiakou 075000,Hebei)

机构地区：[1]张家口市涿鹿林场,河北张家口075600 [2]河北农业大学林学院,河北保定071000 [3]张家口市塞北林场(市国有林场管理处),河北张家口075000

出　　处：《防护林科技》2022年第4期30-32,共3页Protection Forest Science and Technology

基　　金：中央财政林业科技推广示范资金项目“标准化水源保护林营造及经营示范区建设”(冀sfq〔2020〕003号)。

摘　　要：为了解坡位对枯落物持水特征的影响,采用样地调查和室内浸泡法对油松林不同坡位枯落物持水特性进行研究。结果表明:枯落物蓄积量和自然含水率坡下>坡上,枯落物持水量随时间呈对数关系,枯落物吸水速率随时间增加而减小,呈指数关系;枯落物最大持水量、有效拦蓄量和有效拦蓄率均为坡上>坡下。综合对比得出油松林坡下枯落物持水性能优于坡上。Slope position is an important factor affecting the characteristics of water holding capacity of litter.In this paper,the characteristics of water holding capacity of litter in different slope positions of Pinus tabulaeformis were studied by sampling investigation and indoor soaking method.The results showed that the volume and natural water content of litter under slope were higher than those of litter on slope.The water capacity of litter showed a logarithmic relationship with time.The water absorption rate of litter decreased exponentially with the increase of time.The maximum water holding capacity,effective storage capacity and effective storage rate of litter were up-slope>down-slope.The results showed that the water holding capacity of litter under slope was better than that on slope in P.tabuliformis forest.

关 键 词：冀西北 枯落物 坡位 枯落物水文 

分 类 号：S791.254[农业科学—林木遗传育种]