摘要
目的]探究昆嵛山国家级自然保护区内4种不同林分类型(日本落叶松林、蒙古栎-日本落叶松混交林、赤松林、杉木林下土壤质量状况。[方法]采用野外调查结合室内分析的方法,对不同林分下土壤剖面各层次土壤理化及生物学性质进行测定分析,运用土壤质量综合指数法结合主成分分析对不同林分土壤质量进行综合分析与评价。[结果]随土层深度的加深,不同林分土壤密度随之增加,总孔隙度随之显著降低(P<0.05);日本落叶松林、赤松林土壤毛管孔隙度均随土层深度增加而显著减小,蒙古栎-日本落叶松混交林、杉木林反之;不同林分土壤p H值均介于4.135.07之间,为酸性土壤;有机质、全氮、碱解氮、全磷、速效钾含量总体上均呈随土层深度增加而降低的趋势,呈现出土壤养分的表聚性特征;4种林分各土层全钾含量总体上无显著差异(P<0.05),日本落叶松林2040 cm、4060 cm层土壤全钾含量(2.22 g·kg^(-1)和2.34 g·kg^(-1))显著高于其他林分;除杉木林外,其他林分各土层有效磷含量均随土层深度增加而增加;除土壤蔗糖酶外,其余3种土壤酶活性在不同林分中均随土层深度的增加而减小;4种林分土壤质量综合指数大小排序为:日本落叶松林(0.792)>蒙古栎-日本落叶松混交林(0.639)>杉木林(0.353)>赤松林(0.267)。[结论]不同林分对土壤剖面各层次理化性质影响显著,不同林分类型土壤质量状况各异,其中日本落叶松林土壤质量最好,赤松林土壤质量最次。
[Objective]To explore the soil quality under the four forest types(Larix kaempferi,Quercus mongolica+Larix kaempferi,Pinus densiflora,and Cunninghamia lanceolata)in Kunyushan National Nature Reserve.[Method]Using the method of soil sampling combined with laboratory analysis,the physical and chemical properties and enzyme activities in different soil profiles under these forests were analyzed.The comprehensive analysis and evaluation of soil quality under different forest types were conducted by integrated soil quality index and principal component analysis.[Result]The soil density of different forests increased with the increase of soil depth,and the total porosity decreased significantly(P<0.05).The capillary porosity of L.kaempferi and P.densiflora were significantly reduced with the increase of soil depth,while the Q.mongolica+L.kaempferi and C.lanceolata were the opposite.The soil pH ranged from 4.13 to 5.07.The contents of soil organic matter,total nitrogen,total phosphorus,available nitrogen,and available potassium generally decreased with the increasing of soil depth,reflecting the surface aggregation characteristic of soil nutrient.On the whole,the soil total potassium content had no significant differences in different soil layers under four forest types(P<0.05),the soil total potassium content in 20-40 cm and 40~60 cm layers of L.kaempferi were significantly higher than that of other forests.In addition to C.lanceolata,the soil available phosphorus content increased as soil depth increased.Except for soil invertase,the activity of other three soil enzyme decreased with the increase of soil depth.The soil quality index of these forests showed an order of L.kaempferi(0.792)>Q.mongolica+L.kaempferi(0.639)>C.lanceolata(0.353)>P.densiflora(0.267).[Conclusion]Forest type has a significant impact on the physical and chemical properties at different levels of the soil layers.The soil quality status of different forest types is different,among them,the soil quality of L.kaempferi forest is the best,and the soil
作者
邵国栋
艾娟娟
孙启武
董玉峰
李建伟
SHAO Guo-dong;AI Juan-juan;SUN Qi-wu;DONG Yu-feng;LI Jian-wei(Research Institute of Forestry,Chinese Academy of Forestry,State Key Laboratory of Forestry Genetics and Tree Breeding,Beijing 100091,China;Shandong Forestry Academy,Jinan 250014,Shandong,China;Kunyushan Forest Farm,Yantai 264100,Shandong,China)
出处
《林业科学研究》
CSCD
北大核心
2018年第6期175-184,共10页
Forest Research
基金
国家科技基础性工作专项--中国森林土壤调查
标准规范及数据库构建(2014FY120700)
关键词
昆嵛山
森林土壤
土壤剖面
林分类型
土壤质量
Kunyushan Mountains
forest soil
soil profile
forest type
soil quality
