5种人工相思林凋落物现存量及其持水特性  

Water-Holding Capacity and Accumulation Amount of Litters of Five Kinds of Acacia Plantations

作　　者：赵文东 李凯 王俊 何宗明[1,2] HAO Wendong;LI Kai;WANG Jun;HE Zongming(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,China;Fir Engineering Technology Research Center,State Forestry Administration,Fuzhou 350002,China)

机构地区：[1]福建农林大学林学院,福州350002 [2]国家林业局和草原局杉木工程技术研究中心,福州350002

出　　处：《四川农业大学学报》2020年第6期677-684,共8页Journal of Sichuan Agricultural University

基　　金：国家自然科学基金项目(30972354)。

摘　　要：【目的】对福建省漳浦县5种相思树种人工林林下凋落物现存量及其持水特性进行研究,找出林下凋落物持水能力强的相思树种。【方法】通过野外调查与室内凋落物网袋浸泡法,研究5种相思树种人工林林下凋落物的现存量及其持水特性。【结果】林下凋落物现存量为马占相思(16.13 t/hm2)>厚荚相思(11.25 t/hm2)>卷荚相思(9.69 t/hm2)>直干大叶相思(9.66 t/hm2)>黑木相思(6.40 t/hm2);林下调落物最大持水量为马占相思(30.70 t/hm2)>卷荚相思(18.31 t/hm2)>厚荚相思(17.72 t/hm2)>直干大叶相思(16.00 t/hm2)>黑木相思(10.46 t/hm2);5种人工林林下凋落物最大持水率在157.48%~190.35%之间,表现为马占相思(190.35%)>卷荚相思(187.03%)>直干大叶相思(165.57%)>黑木相思(163.43%)>厚荚相思(157.48%);林下凋落物有效拦蓄量在7.29~23.65 t/hm2之间,其排序为马占相思(23.65 t/hm2)>卷荚相思(13.46 t/hm2)>厚荚相思(12.86 t/hm2)>直干大叶相思(12.27 t/hm2)>黑木相思(7.29 t/hm2)。【结论】马占相思人工林林下凋落物现存量和水文效应最大。【Objective】Accumulation and water holding characteristics of forest floor litter of five species Acacia plantations in Zhangpu County,Fujian Province were studied in order to find out the Acacia species with high water holding capacity of forest floor litter.【Method】Using field investigation and indoor litter bag soaking method,the accumulation and water holding characteristics of forest floor litter under five species Acacia plantations were studied.【Result】Forest floor litter accumulation was in the order:Acacia mangium Willd.(16.13 t/hm2)>Acacia crassicarpa Benth.(11.25 t/hm2)>Acacia cincinnata F.Muell.(9.69 t/hm2)>Acacia auriculiformis A.Cunn.ex Benth(9.66 t/hm2)>Acacia melanoxylon R.Br.(6.40 t/hm2).Maximum water holding capacity of forest floor litter is Acacia mangium Willd.(30.70 t/hm2)>Acacia cincinnata F.Muell.(18.31 t/hm2)>Acacia crassicarpa Benth.(17.72 t/hm2)>Acacia auriculiformis A.Cunn.ex Benth.(16.00 t/hm2)>Acacia melanoxylon R.Br.(10.46 t/hm2)Maximum water holding rate of forest floor litter under the five species Acacia plantations,varied between 157.48%and 190.35%,were as follows:Acacia mangium Willd.(190.35%)>Acacia cincinnata F.Muell.(187.03%)>Acacia auriculiformis A.Cunn.ex Benth.(165.57%)>Acacia melanoxylon R.Br.(163.43%)>Acacia crassicarpa Benth.(157.48%).Effective storage capacity of forest floor litter,varied between 7.92 and 23.65 t/hm2,were in the order:Acacia mangium Willd.(23.65 t/hm2)>Acacia cincinnata F.Muell.(13.46 t/hm2)>Acaica crassicarpa Benth.(12.86 t/hm2)>Acaia auriculiformis A.Cunn.ex Benth.(12.27 t/hm2)>Acacia melanoxylon R.Br(7.29 t/hm2).【Conclusion】Aca-cia mangium Willd.plantations had the highest accumulation of forest floor litter and hydrological effect.

关 键 词：人工相思林 凋落物 持水量 持水率 吸水速率 有效拦蓄量 

分 类 号：S715.7[农业科学—林学]