摘要
为定量评价北京山区森林水源涵养能力,对3种典型林分类型(栓皮栎林、油松林、灌木林)枯落物和土壤层水文效应进行了研究。结果表明:3种林分枯落物累积量范围为12.93~32.67 t/hm 2,其中油松林最大,灌木林最小;枯落物最大持水量和有效拦蓄量从大到小排序依次均为栓皮栎林、油松林、灌木林;土壤毛管孔隙度的变动范围为30.5%~38.1%,由大到小排序依次为栓皮栎林、油松林、灌木林,且随土壤深度的加深而逐渐减少;栓皮栎林地土壤最大持水量和非毛管持水量最大,分别为3621.0 t/hm 2和816.0 t/hm 2,其次为油松林和灌木林。不同林分枯落物持水量与浸泡时间符合方程Q=a ln﹙t﹚+b;枯落物层吸水速率与浸水时间符合方程V=kt n。从枯落物层和土壤层持水量来看,栓皮栎林持水能力最好。
In order to assess the water conservation ability of main forest in Beijing mountainous area,the hydrological effect of the litter layer and soil layer of 3 typical tree species(Quersus variabilis,Pinus tabulaeformis,shrub)were studied.The results showed that the total litter layer storage of 3 typical tree species was about 12.93~32.67 t/hm 2.The Pinus tabulaeformis forest was the largest and the shrub forest was the smallest.The litter maximum water-holding capacity and effective interception from large to small were Quersus variabilis forest,Pinus tabulaeformis forest,shrub forest.The soil capillary porosity of different forest types,decreased with the increase of the soil depth,ranged from 30.5%to 38.1%,which shows a large to small rank of Quersus variabilis forest,Pinus tabulaeformis forest,shrub forest.The maximum water-holding capacity of Quersus variabilis forest was 3621.0 t/hm 2 and noncapillary porosity water holding capacity was 816.0 t/hm 2,followed by Pinus tabulaeformis forest and the shrub forest.Moreover,water holding capacity of litter had a correlation with immersion time(Q=a ln t+b).Water absorption rates showed a power function with soaking time(V=kt n).Based on the analysis of litter and soil water retention characteristics of 3 typical tree species,it was found that the water holding capacity of Quersus variabilis forest was the best.
作者
马雯静
曾倩婷
郑江坤
侯贵荣
MA Wenjing;ZENG Qianting;ZHNEG Jiangkun;HOU Guirong(Sichuan Water Conservancy Vocational College,Chongzhou 611231,China;College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;College of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China)
出处
《人民长江》
北大核心
2020年第10期67-72,共6页
Yangtze River
基金
国家自然科学基金青年项目(41601028)
国家自然科学基金面上项目(41671277)
四川水利职业技术学院科研项目(KY2019-23)。
关键词
枯落物
土壤孔隙度
最大持水量
有效持水量
forest litter
soil porosity
maximum water capacity
available water capacity
