摘要
针对小兴安岭林区不同类型原始红松林对降雨水化学特性影响进行研究。结果表明:穿透雨中K+、Mg2+含量在红松人工林中最高,年均含量分别为6.803,1.352mg/L;Ca2+、Na+、Cl-含量在枫桦红松林中最高,分别为12.200,2.513,3.436mg/L;Fe、Mn、SO24-、NH4+含量在椴树红松林中最高,分别为0.036,0.011,3.598,0.483mg/L。树干茎流中K+、Na+、Mn、SO24-、Cl-和NH4+平均含量在枫桦红松林最高,分别达9.138,6.180,0.338,9.861,7.209,2.181mg/L;Ca2+、Mg2+、Fe含量在椴树红松林中最高,年均含量分别为17.860,3.320,0.131mg/L。各红松林型穿透雨中K+、SO24-、Cl-含量在秋季达最高值,Na+、Ca2+、NH4+含量在春季达最高值,Mn、Mg2+、NH4+含量在夏季达最低值。树干茎流中K+、Na+、Mg2+、Mn、SO24-、Cl-含量均表现出明显的春季含量高、夏秋季含量低的趋势,其中Na+、Mg2+、Mn、SO24-夏季含量与秋季含量差异较小(P>0.05)。不同元素大气降雨、穿透雨、树干茎流三者间关系不同。Mg2+、Fe、Mn、SO24-含量呈现树干茎流>穿透雨>大气降雨的趋势。各林冠对Ca2+春季产生淋溶作用,夏季产生吸附作用,秋季枫桦红松林和椴树红松林表现为吸附作用,云冷杉红松林和人工红松林为淋溶作用。各林型穿透雨中NH4+含量均低于大气降雨,树干茎流中NH4+含量均高于大气降雨,其中3种原始红松林树干茎流中NH4+含量明显高于红松人工林。春季除椴树红松林外,其他林型对Na+产生吸附作用。
The effects of different types of original Pinus korainensis forest on rainfall chemistry were studied in Xiaoxing＇an Mountains.The results showed that： K＋,Mg2＋ contents of the throughfall were highest in Pinus korainensis plantation at 6.803,1.352 mg/L;the average annual contents of Ca2＋,Na＋,Cl-were highest in Betula costata-koraiensis at 12.200,2.513,3.436 mg/L,respectively;Fe,Mn,SO2-4,NH＋4 contents were of the highest in Tilia amurensis-koraiensis forest at 0.036,0.011,3.598,0.483 mg/L.Average contents of K＋,Na＋,Mn,SO2＋4,Cl＋ and NH＋4 of stemflow were highest in Betula costata-koraiensis at 9.138,6.180,0.338,9.861,7.209,2.181 mg/L;Ca2＋,Mg2＋,Fe contents were highest in Tilia amurensis-koraiensis forest with the average annual concentration of 17.860,3.320,0.131 mg/L.K＋,SO2-4,Cl-contents of throughfall reached the highest value in autumn;Na＋,Ca2＋,NH＋4 contents reached the highest value in spring;Mn,Mg2＋,NH＋4 contents were lowest in summer.K＋,Na＋,Mg2＋,Mn,SO2-4,Cl-contents of stemflow were higher in spring and lower in summer and autumn,in which Na＋,Mg2＋,Mn,SO2-4 concentration exhibited small differences between summer and autumn（P0.05）.Rainfall,throughfall,stemflow ranked differently in various substance.Mg2＋,Fe,Mn and SO2-4 contents showed the trend of stemflow throughfall rainfall.All canopy generated a leaching effect on Ca2＋ in spring and adsorption effect in summer;Betula costata-koraiensis and Tilia amurensis-koraiensis forest absorbed,Picea sp.,Abies nephlolepis-koraiensis forest and Pinus koraiensis plantation leached Ca2＋ in autumn.For all forest types,NH＋4 contents of throughfall was lower than rainfall and that of the stemflow was higher than rainfall,in which NH＋4 contents of three original Pinus korainensis forest were significantly higher than Pinus korainensis plantations.All forest types absorbed Na＋ except from Tilia amurensis-koraiensis forest.
出处
《水土保持学报》
CSCD
北大核心
2012年第2期184-191,共8页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(30870420)
关键词
原始红松林
降雨水化学
穿透雨
树干茎流
original Pinus koraiensis
rainfall chemistry
throughfall
stemflow
