林型差异对土壤理化性状及其持水能力的影响  

Impact of forest types on soil physical and chemical properties and waterholding capacities

作　　者：彭玉华[1,2,3] 黄小荣 申文辉[1,2,3] 庞世龙 何琴飞[1,2,3] 欧芷阳 

机构地区：[1]广西林业科学研究院,广西南宁530002 [2]广西优良材林资源培育重点实验室,广西南宁530002 [3]国家林业局中南速生材繁育实验室,广西南宁530002

出　　处：《中南林业科技大学学报》2017年第8期1-5,17,共6页Journal of Central South University of Forestry & Technology

基　　金：广西林业科技项目"珠江流域中上游水源涵养林结构及功能研究"(桂林科字[2012]第7号);国家林业公益性行业科研专项"南方几种森林类型公益林经营技术研究"(201204512)

摘　　要：为了探明林型差异对土壤理化特征及其持水能力的影响,采集老虎岭水源涵养林区域4种最典型的林型(马尾松林、马尾松-红锥林、马尾松-红锥-椆木林、红锥-大叶栎林)土壤进行理化特征及其持水能力测定分析。结果表明:土壤毛管孔隙度、持水能力和化学性质在4种林型中存在明显的差异,其中马尾松-红锥林土壤容重最小,总孔隙度和毛管孔隙度最大,最大持水量、毛管持水量、有机质、速效氮和速效磷最多;马尾松-红锥-椆木林非毛管孔隙度最大,全氮、全磷、速效钾和代换性镁最多;红锥-大叶栎林全钾最多;马尾松林土壤容重、非毛管持水量和代换性钙最大,总孔隙度、毛管孔隙度、自然含水率、最大持水量、毛管持水量、全量和速效养分均最低。总体表现,混交林型的土壤理化特征及持蓄能力均优于马尾松纯林,尤以马尾松-红锥林型为最佳。To investigate the impact of forest types on soil physical and chemical properties and water-holding capacities, soil samples from 4 typical forest types in Laohuling watershed were tested, including Pinus massoniana, P. massoniana/Castanopsis hystrix, P. massoniana/C. hystrix/Lithocarpus thalassica and C. hystrix/Castanopsis fissa forests. The results showed that soil capillary porosity, water-holding capacity and chemical property presented significant differences among 4 forest types, and P. massoniana/Castanopsis hystrix forest had lowest bulk density; highest total porosity, capillary porosity, maximum water holding capacity, capillary moisture capacity, organic matter, available nitrogen, and available phosphorus. P. massoniana/C. hystrix/Lithocarpus thalassica forest had largest noncapillary porosity and highest total nitrogen, total phosphorus, available potassium and exchangeable magnesium. C. hystrix/Castanopsis fissa forest soil harbored highest total potassium. P. massoniana forest had highest bulk density, noncapillary water holding capacity and exchangeable magnesium; and lowest total porosity, capillary porosity, water content, maximum water holding capacity, capillary water holding capacity, total nutrients and available nutrients. In overall, mixed forests surpassed pure P. massoniana forest in soil physical and chemical properties and water-holding capacities, especially the mixed P. massoniana/Castanopsis hystrix forest.

关 键 词：林型 土壤物理特性 土壤化学特性 水源涵养 

分 类 号：S718.45[农业科学—林学]