摘要
以滇中抚仙湖径流区4种典型森林(云南松林、混交林、桤木林、慈竹林)为对象,初步探究林地土壤容重和孔隙度等物理性质以及土壤水源涵养功能。结果表明:0-80cm土层内,桤木林、混交林和慈竹林平均土壤容重变幅为1.46-1.50g/cm^3,显著低于云南松林(1.60g/cm^3)。毛管孔隙度大小顺序为混交林>桤木林>云南松林>慈竹林。而土壤毛管孔隙度占总孔隙度的比例大小顺序为:云南松林>混交林>桤木林>慈竹林。慈竹林非毛管孔隙度及其占总孔隙度的比例最高,其次为桤木林和混交林,云南松林最低。慈竹林0-80cm土层土壤非毛管孔隙度是云南松林的2.1倍,而土壤非毛管孔隙度占总孔隙度的比例是云南松林的1.8倍。4种森林80cm土层内土壤最大持水量变幅为3103-3540t/hm^2,其大小顺序为慈竹林>混交林>桤木林>云南松林。慈竹林土壤有效蓄水量为1254t/hm^2,是其他3种森林的1.4-2.1倍。4种森林80cm土层内土壤有效水储量在2286-2586 t/hm^2之间。总体上,4种森林土壤均具有较强的水源涵养效益,云南松林稍差。
Based on four typical forests(Pinus yunnanensis forest:PF,mixed forest:MF,Alnus nepalensis forest:AF and Sinocalarnus affinis forest:SF)in the runoff area of Fuxianhu Lake,the water conservation functions of soil in forests,including soil bulk density and porosity,were explored.The results showed that:within the soil depth of 80 cm,the average soil bulk densities varied from 1.46g/cm^3 to 1.50g/cm^3 in the AF,MF and SF,which was significantly lower than that of the PF(1.60g/cm^3).The order of soil capillary porosity in the four forests was:MF>AF>PF>SF.However,the order of the ratio of soil capillary porosity to total porosity was:PF>MF>AF>SF.The SF had the highest non-capillary porosity and its ratio to total porosity,followed by AF and MF,and the PF was the lowest.The non-capillary porosity and its ratio to total porosity of the SF were 2.1 times and 1.8 times those of the PF,respectively.Within the soil depth of 80cm,the maximum soil water holding capacity of the four forests ranged from^3103t/hm^2 to 3540t/hm^2,and the order was:SF>MF>AF>PF.The effective water holding capacity of SF was 1254t/hm^2,which was 1.4 to 2.1 times that of the other forests.The effective soil water reserves of the four forests ranged from^2286t/hm^2 to 2586t/hm^2.In general,all the studied four forests has strong water conservation benefits,the PF is slightly worse.
作者
杨钟学
奎燕
鲍绍辉
王云瀚
李品荣
唐国勇
YANG Zhong-xue;KUI Yan;BAO Shao-hui;WANG Yun-han;LI Pin-rong;TANG Guo-yong(Forestry and Grassland Bureau of Chengjiang County,Chengjiang Yunnan,652500,P.R.China;Yunnan Academy of Forestry and Grassland,Kunming Yunnan,650204,P.R.China;Research Institute of Resource Insects Chinese Academy of Forestry,Kunming Yunnan,650233,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2020年第2期57-61,共5页
Journal of West China Forestry Science
基金
国家自然科学基金(31670613)。
关键词
湿地
植物群落
主要种
生态位
soil bulk density
soil porosity
water holding capacity
water conservation by soil
作者简介
第一作者:杨钟学(1970-),男,高级工程师,主要从事森林资源培育研究。E-mail:yzx579@sina.com;通讯作者:唐国勇(1980-),男,副研究员,硕士生导师,主要从事土壤与环境生态研究。E-mail:451533732@qq.com。
