人工落叶松林降雨截留再分配及其水化学特征  

Rainfall Redistribution and Hydrochemical Characteristics in the Larch Plantation

作　　者：盛后财[1] 蔡体久[1] 朱道光[2] 石福臣[3] 

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040 [2]黑龙江省科学院自然资源研究所,黑龙江哈尔滨150040 [3]南开大学生命科学学院,天津300071

出　　处：《水土保持学报》2009年第2期79-83,89,共6页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(30771713,30870420);中日合作项目“黑龙江支流域生物地球化学过程研究”

摘　　要：以凉水国家级自然保护区内的人工落叶松林为研究对象,对其林冠截留再分配和水化学特征变化进行了系统研究,结果表明:(1)一个生长季内(4-9月),人工落叶松林林冠总截留量为109.19 mm,占同期降雨量21.71%,穿透雨量为393.39 mm,占同期降雨量的78.20%;树干茎流量为0.47 mm,占同期降雨量的0.093%;(2)按照各养分元素月平均浓度排序,林外雨为:Ca>K>Mg>Si>Mn>Na>Fe,穿透雨为:Ca>K>Si>Na>Mg>Fe>Mn,树干茎流为:Ca>Na>Mg>Si>K>Mn>Fe,且不同样品按照养分元素浓度稳定度排序为:树干茎流>穿透雨>林外雨;(3)人工落叶松林养分元素净输入排序为:K>Mg>Mn>Na>Fe>Ca>Si,净输入量依次为22.339,2.920,0.856,-0.216,-0.260,-1.280,-2.478 kg/hm2,其中,穿透雨占人工落叶松林(穿透雨+树干茎流)元素输入量的98.23%,树干茎流占1.77%。The redistribution and hydrochemical characteristics of precipitation through forest canopy in the Larch plantation were studied, the results showed that： （1） the amounts of interception, throughfaU and stemflow were 109.19 mm, 393.39 ram, and 0.47 mm, respectively, accounting for 21.71%, 78.20% and 0. 093% of the total rainfall during the growing season i.e. from April to September; （2） the monthly mean concentration of nutrient elements were arranged as Ca〉K〉Mg〉Si〉Mn〉Na〉Fe for rainfall, Ca〉K〉Si〉Na〉Mg〉Fe〉Mn for throughfall, Ca〉Na〉Mg〉Si〉K〉Mn〉Fe for stemflow. The samples orders were stemflow〉thoughfall〉rainfall, according to the stability of their nutrient concentration; （3）net nutrient inputs were arranged as K〉Mg〉Mn〉Na〉Fe〉Ca〉Si, their amounts were 22. 339, 2. 920,0. 856, -0. 216, -0.260, - 1. 280, -2. 478 kg/hm^2, respectively, and the proportion of nutrient inputs of through- fall against stemflow was 98.23% vs. 1.77%.

关 键 词：人工落叶松林 林冠截留 穿透雨 树干茎流 养分输入 

分 类 号：S715.2[农业科学—林学]