毛竹林渗滤水养分的淋溶特征  

Leaching Characteristics of Nutrients of Percolating Water in Different Phyllostachys edulis Stands

作　　者：高志勤[1] 傅懋毅[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所

出　　处：《南京林业大学学报（自然科学版）》2005年第6期95-98,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：2001~2005年国际合作项目(200085401);国际林业研究中心(CIFOR)资助项目

摘　　要：对夏季采集的毛竹林下土壤渗滤水样进行分析,以揭示不同毛竹林养分淋溶特征.结果表明:渗滤水阳离子浓度分布模式因深度和林分而异,未垦复毛竹纯林与毛竹木荷混交林渗滤水离子浓度分布模式相似而与垦复毛竹纯林不同.未垦复毛竹纯林中,40 cm处土壤K+和Na+浓度较20 cm处的大,而垦复毛竹纯林中状况相反;垦复毛竹纯林Ca2+和Mg2+淋失显著增强.毛竹木荷混交林土壤40 cm深度处各阳离子浓度较20 cm处高.毛竹纯林土壤20 cm处NH4+-N浓度较40 cm处高,而毛竹木荷混交林与之相反.阳离子总淋失强度均以垦复毛竹纯林最大,未垦复毛竹纯林小于常绿阔叶林,毛竹木荷混交林最小.渗滤水养分在20～40 cm土层内留存量以毛竹木荷混交林最高,常绿阔叶林次之,毛竹纯林呈现养分输出大于输入.因此,毛竹木荷混交林养分淋失量低于未垦复毛竹纯林,垦复毛竹纯林养分淋失量最多.With a view to revealed leaching characteristics of nutrients in percolating water of different Moso （Phyllostachys edulis） stands, percolating water was collected and analysed during the period from May 31 to July 23 in 2003. It turned out that patterns of distribution of the cationic ions concentration in percolating water were varied with soil depth or expermental stands. It was similar to patterns of distribution of ions concentration in percolating water between non reclamation pure Moso stands and mixed Moso with Schirna superba stands but different from reclamation pure Moso stands. The concentration of K^＋ and Na^＋ in percolating water at the depth of 40 cm downwards was higher than that of 20 cm in non reclamation pure Moso stands. Nevertheless, the status was reversal in reclamative one. The losing intensity of Ca^2＋ and Mg^2＋ significantly increased in reclamation pure Moso stands. The concentration of various cationic ions in percolating at the depth of 40 cm was higher than that of 20 cm in mixed Moso with S. superba stands. The concentration of NH4^＋-N at the depth of 20 cm was higher than that of 40 cm in pure Moso stands whereas reversed to mixed Moso with S. superba stands. The total leaching intensity of cationic ions in percolating water at the depth of 20 cm or 40 cm downwards was the highest in reclamation pure Moso stands,which of non reclamation pure Moso stands was lower than that of aiphyllium stands whereas it was minimal for mixed Moso with S. superba stands. Amounts of nutrients were the highest remained in the soil layer of 20-40 cm after percolation of mixed Moso with S. superba stands,aiphyllium was inferior to mixed stands and it also indicated that the output exceeded the input of cationic nutrients in pure Moso bamboo stands. Therefore, amounts of lossing nutrients in mixed Moso with S. superba stands were lower than that in non reclamation pure Moso stands,while it was the most in the reclamation pure Moso stands. Thus the results would provide some basic principle

关 键 词：毛竹林 渗滤水 养分 淋溶 

分 类 号：S718[农业科学—林学] S795