冀北山区华北落叶松人工林对土壤化学性质的影响  

Impact of Larch Plantation on Soil Chemical Property in North Mountain of Hebei

作　　者：马云波[1] 许中旗[1] 张岩 程顺 黄选瑞[1] 崔博文[1] 底凯 

机构地区：[1]河北农业大学林学院,河北省林木种质资源与森林保护重点实验室,河北保定071000 [2]塞罕坝机械林场,河北围场068466

出　　处：《水土保持学报》2015年第4期165-170,共6页Journal of Soil and Water Conservation

基　　金：国家林业公益性行业科研专项(20100400205,201404206-02)

摘　　要：为了研究冀北山区华北落叶松人工林土壤化学性质的变化,采用空间替代时间的研究方法,分析比较了不同林龄华北落叶松人工林林下土壤的酸碱度、阳离子交换量、盐基饱和度、土壤有机质及速效养分含量。结果表明,随着林龄的增长,土壤pH值、速效钾含量有逐渐下降的趋势,土壤速效磷含量有所增加,一代林碱解氮含量呈上升趋势,而土壤盐基饱和度没有明显的变化。同时,与华北落叶松一代人工林相比,二代林土壤pH值下降0.23个单位,土壤阳离子交换量、盐基饱和度、有机质含量、碱解氮含量与速效钾含量分别下降44.43%,9.59%,24.01%,20.27%和28.88%,土壤速效磷含量上升8.09%。该地区华北落叶松人工林土壤有轻微酸化的趋势,二代林土壤肥力有下降的趋势,因此在森林经营管理过程中应采取相应措施加以防范。In order to understand the change of soil chemical property in north mountain of Hebei,the method of spatial sequence instead of time successional sequence was adopted.The soil pH value,cation exchange capacity,base saturation,soil organic matter content and available soil nutrient content were carried out in larch plantations of different stand ages.The results showed that：with the increasing of stand age,there is agradually declining trend on the soil pH value and available K content,the content of soil available P increased gradually,soil available N content of first rotation increased gradually,soil base saturation had no obvious change.Compared with first rotation,the soil pH value of second rotation decreased by 0.23,the soil cation exchange capacity,base saturation,organic matter content,available N content and available K content of second rotation had respectively reduced by 44.43%,9.59%,24.14%,20.27% and 28.88%,soil available P content of second rotation increased by 8.09%.It was concluded that there is a trend of soil acidification in larch plantation in this area,and the soil fertility of second rotation showed a downward trend.Therefore,we should take some appropriate measures to prevent in the process of forest management.

关 键 词：落叶松人工林 林龄 土壤酸化 土壤养分含量 

分 类 号：S714[农业科学—林学] S791.22