杉木等几种人工林凋落物持水特性研究  

Water Holding Characteristics of Litters of Seven Typical Plantations

作　　者：陈水莲 叶金盛 曾曙才[3] 梁远楠 廖国春 

机构地区：[1]肇庆市林业科学研究所,广东肇庆526020 [2]广东省林业调查规划院 [3]华南农业大学林学院

出　　处：《广东林业科技》2010年第5期56-61,共6页Forestry Science and Technology of Guangdong Province

基　　金：广东省自然科学基金项目(06025810);国家森林资源和生态状况综合监测试点项目(枯落物分析研究)(4400-H07089)

摘　　要：对粤西、粤北杉木、马尾松、湿地松、马占相思、尾叶桉、黎蒴和毛竹等7种主要人工林凋落物的持水量、持水率和吸水速率进行测定。结果表明,马占相思、尾叶桉、黎蒴、湿地松、毛竹、马尾松和杉木的凋落物最大持水率分别为284.74%、253.36%、236.47%、226.06%、212.06%、187.68%和181.16%,树种间差异较大。凋落物持水量和持水率均随浸泡时间增加呈对数方程W=a＋blnt增加。7种林分凋落物的吸水速率在浸泡0.5-1.5 h时均为马占相思〉尾叶桉〉湿地松〉毛竹〉黎蒴〉马尾松〉杉木,各林分凋落物吸水速率WA随浸泡时间t的延长呈方程WA=a.t^-b下降。马占相思凋落物水源涵养能力最强,杉木最弱,阔叶树大于针叶树。Litter amounts,water holding capacity and absorption rates were studied in plantations of Cunninghamia lanceolata,Pinus massoniana,P.elliottii,Acacia mangium,Eucalyptus urophylla,Castanopsis fissa and Phyllostachys edulis in Guangdong province.The proportional water holding capacity as a percentage of the litter dry weight in A.mangium,E.urophylla,C.fissa,P.elliottii,P.edulis,P.massoniana,C.lanceolata plantations were 284.74%,253.36%,236.47%,226.06%,212.06%,187.68%and 181.16%,respectively.The total water holding capacity and proportional water holding capacity of litter increased logarithmically according to the equation W = a ＋ b ln t with increasing time immersed in water.The water absorption rate of litter was A.mangium E.urophylla P.elliottii P.edulis C.fissa P.massoniana C.lanceolata between 0.5 and 1.5 hours.Water absorption rates of litter in all plantations decreased according to equation W A=a·t-b with increasing time immersed in water.

关 键 词：人工林 凋落物持水量 凋落物持水率 凋落物吸水速率 

分 类 号：S714.8[农业科学—林学] Q948[生物学—植物学]