作　　者： ; ; ; ; (李爱英）;

机构地区： 广东省林业调查规划院广东广州510500

出　　处： 《土壤通报》 2010年第2期270-274,共5页

摘　　要： 研究了95个桉树林的土壤肥力。按母岩将95个林分土壤合并为花岗岩、石灰岩、紫色砂岩、砂页岩、玄武岩发育的土壤类型,分析各类土壤的理化性质与桉树生长的关系。结果表明:花岗岩发育成的土壤的容重较小,非毛管孔隙较多,通气好,持水量一般;各种养分都处于中等或偏低水平,但在5种母岩形成的土壤中多处于较高水平,整体土壤肥力较高;石灰岩发育成的土壤容重最小,毛管孔隙和最大持水量大,非毛管孔隙较小,故保水能力强,通气差,全N含量在5种土壤中稍低,其它养分含量均较高,整体土壤肥力高;紫色砂岩发育成的土壤容重大,非毛管孔隙极少,通气差,持水量小,全K和速效K含量位于5种土壤之首,其它养分含量低,整体的土壤肥力低;砂页岩发育成的土壤毛管孔隙度小,非毛管孔隙度大,通气好,在5种土壤中全N含量较高,其它养分含量处于中等或较低水平,土壤肥力较差;玄武岩发育成的土壤容重中等、毛管孔隙少、非毛管孔隙中等,全P和有效P含量在5种土壤中较高,其余养分含量较低,土壤肥力较低。将桉树林地与其它林地的土壤理化性质比较可知,桉树林地的土壤容重大,通气不良,持水能力差,有机质、全N、全K、速效N、速效K含量低。 Mechanical sampling was used to set 95 plots in eucalypt plantations in Guangdong Province.Ring knife method was used to study soil physical characteristics,such as soil bulk density,soil capillary porosity,non-capillary porosity and soil maximum water.Soil chemical analysis methods were used to determine the contents of soil organic matter,total N,total P,total K,alkalized N,available P and available K.According to the parent rocks developing the soils,95 soils were classified into five soil types developed from granite,limestone,purple sandstone,sandshale and basalt.The results indicated that the soils developed from granite had small soil density,great non-capillary porosity,good aeration ability and median water preserving ability;their nutrients kept a median or slight low level,which was a relatively high level among the soils developed from the five parent rocks,so that their soil fertility was generally high.The soils developed from limestone showed the smallest soil density and the greatest capillary porosity and water preserving ability,whereas their non-capillary porosity was small,so that their water preserving ability was strong and aeration ability was weak.Their total N was slight low among the soils developed from the five parent rocks,whereas other nutrients were high,as a result,their soil fertility was generally high.The soils developed from purple sandstone had great soil density,little non-capillary porosity,weak aeration ability and water preserving ability.Their total K and available K were greatest among the soils developed from five parent rocks,whereas other nutrient contents were low,resulting in their low soil fertility.The soils developed from sandshale owned small capillary porosity,great non-capillary porosity and good aeration ability.Their total N content was relatively high,whereas other nutrient contents kept a median or relatively low level,causing their relatively low soil fertility.The soil density of the soils developed from basalt was median with a small capillary porosity

关 键 词： 广东 桉树人工林 母岩 土壤肥力

领　　域： [农业科学]