不同人工林类型枯枝落叶层及土壤层水源涵养功能分析  

Analysis of water conservation function of different types of artificial forest litter layer and soil layer

作　　者：周允安 黄承标[2] 曾戍秀 陶大燕[2] 廖满秀 伍辉勇 

机构地区：[1]广西国有高峰林场,广西南宁530001 [2]广西大学林学院,广西南宁530005

出　　处：《广东农业科学》2013年第14期85-87,91,共4页Guangdong Agricultural Sciences

基　　金：广西科技攻关项目(桂科攻11194008)

摘　　要：在广西高峰林场林业示范基地内,选择代表性的3种人工林类型,每种类型各选择3种林龄段,每种林龄按不同立地(上坡、中坡、下坡)各设置3个样地,分别对其林地枯枝落叶层及土壤层进行调查取样测定,探讨其水源涵养功能规律。结果表明:(1)研究区3种人工林类型枯枝落叶现存量平均值为8.47 t/hm2,平均最大蓄水量为24.44 t/hm2,是自身干重的2.9倍;同一树种枯枝落叶现存量及其蓄水量均随林龄的增大而显著递增。(2)研究区3种人工林类型土壤(0～1 m土层)容重为0.92～1.41 g/cm3,总孔隙度为42.83%～66.31%,平均最大蓄水量、毛管蓄水量和最小蓄水量依次为4 318.30、3 702.59和3 465.98 m3/hm2;同一树种的土壤蓄水量均随林龄的增大而显著递增。(3)研究区3种人工林类型枯枝落叶层和土壤层的最大蓄水量显示出灰木莲林(4 670.57 m3/hm2)>厚荚相思林(4 167.62 m3/hm2)>尾巨桉林(4 116.72 m3/hm2);3种林分平均最大蓄水量为4 318.30 m3/hm2,折合人民币为5 181.96元/hm2,其水源涵养的经济价值显著。In the forestry demonstration base of Gaofeng forest farm, 3 representative types of artificial forest with each type of the 3 kinds of stand ages and each ages aecording to different sites （uphill, downhill, slope, ） each set of 3 samples were investigating by the litter layer and soil layer, to explore the function of water conservation laws. The results were as follows： （1） The 3 kinds of artificial forest litter biomass average was 8.47 t/hm2, the average maximum storage capacity was 24.44 t/hm2, which was 2.9 times its dry weight. The same tree biomass of litter and water content signifieantly increased with stand age increasing. （2） The 3 kinds of artifieial forest soil types in study area （0-1 m soil） density was 0.92-1.41 g/cm3, total porosity of 42.83%-66.31%, the average maximum moisture capacity, capillary water storage capacity and the minimum storage capacity was 4 318.30 m3/hm2, 3 702.59 m3/hm2 and 3 465.98 m3/hm2; Tile same tree storage capacity significantly increased with stand age increasing.（3） The maximum storage capacity of 3 kinds of artificial forest litter layer and soil layer showed of Manglietia glauca forest （4 670.57 m3/hm2） 〉 Acacia crassicarpa plantation （4 167.62 m3/hm2） 〉 Eucalypttts urophyllaxE, grandis forest （4 116.72 m3/hm2）. 3 kinds of stand average maximum storage capacity was 4 318.30 m3/hm2, equivalent to RMB 5 181.96 Yuan/hm2, the water conservation had a significant economic value.

关 键 词：人工林 枯枝落叶层 林地土壤层 水源涵养 

分 类 号：S718.56[农业科学—林学]