不同林分类型及土层对土壤养分的影响  

Effects of Different Forest Types and Soil Layers on Soil Nutrients

作　　者：王家彬 徐明锋[2] 蒋谦才 苏志尧[2] 张毅[2] 王永强[2] Wang Jiabing Xu Mingfeng Jiang Qiancai Su Zhiyao ZhangYi Wang Yongqiang(Zhangshan State-owned Center for Forest Resource Conservation Zhongshan 528403 College of Forestry and Landscape Architecture, South China Agricultural University Guangzhou 510642)

机构地区：[1]中山市国有森林资源保护中心,中山528403 [2]华南农业大学林学院,广州510642

出　　处：《湖北林业科技》2017年第1期20-25,共6页Hubei Forestry Science and Technology

基　　金：广东省科技计划项目(2013B020305008);中山市林业局项目(ZSYXCGTP2014143)

摘　　要：在中山五桂山保护区选择4个不同的林分类型,分别进行土壤采样,测定土壤养分指标,分析不同林分类型及土层对土壤养分的影响,为林分改造、土壤养分改良提供理论和数据支撑。结果表明:(1)四种土壤养分指标在四种林分类型间均有显著性差异,四种林分类型的土壤养分指标含量大小排序大致为:沟谷季雨林>阔叶混>针阔混>针叶林,只有有效磷含量是阔叶混大于沟谷季雨林。(2)四种土壤养分指标在针叶林、针阔混交林、沟谷季雨林这3种林型中的5个土层间变化均有显著性差异,而在常绿阔叶林中仅速效钾在5个土层间有显著性差异。(3)四种林分类型中,沟谷季雨林各指标含量相对较高,处于"中下"等级,而针叶林各指标含量低,处于"很低"等级。总的来说,四种林分类型的土壤养分含量偏低,特别是针叶林,各项土壤指标含量均为"很低",可以参考群落演替方向对针叶林进行林分改造来提高土壤养分。Four different forest types were chosen in Wuguishan reserve, Zhongshan, Guangdong and the soil samples which were taken back to the laboratory for determining the soil nutrient index were collected. Through the analysis of the influence of different forest types and different soil layers on soil nutrients, this study provided the theoretical and da- ta support for stand conversion and soil nutrient improvement. The results show that： （1） Four kinds of soil nutrient in- dex between the four forest types all had significarotly different, and the sequence of the soil nutrient index content be- tween four forest types was： ravine monsoon rain forest^broadleaf mixed forest^coniferous and broadleaf mixed forest coniferous forest, except available phosphorus which content in broadleaf mixed forest was higher than ravine monsoon rain that of forest. （2） The changes of four kinds of soil nutrient index between five soil layers were significarotly differ- ent in coniferous forest, coniferous and broadleaf mixed forest and ravine monsoon forest but not in broadleaf mixed for- est which only available kalium was significarotly different, （3） All kinds of soil nutrient index content in the ravine mon- soon rain forest which its soil nutrient index content was in the middle and low level were higher than other forest types, and the soil nutrient index content in the coniferous forest which soil nutrient index content was in the very low level was lowest. In general, the soil nutrient of four forest types was low, especially the coniferous forest, which all kinds of soil nutrient index content were low, so this study suggests that the soil nutrient in the coniferous forest can be improved through the stand transformation by reference to the community succession direction.

关 键 词：林分类型 土层 土壤养分 土壤有机质 碱解氮 

分 类 号：S718.51[农业科学—林学]