摘要
以雄安新区上游的油松林作为研究对象,对其土壤层的水源涵养能力进行研究,结果表明:(1)次生油松林随着土层深度的增加,土壤容重越来越大,说明浅层土壤的渗水透气性较好,深层土壤保水性好,雨季降雨能很好地供给根部;人工油松林随着土层深度的增加,土壤容重呈先降后增趋势。(2)次生油松林随着土层深度的增加,毛管孔隙度、非毛管孔隙度和总孔隙度逐渐降低;人工油松林毛管孔隙度和总孔隙度随土层深度增加而增加,非毛管孔隙度随土层深度增加而降低,说明深层土壤导水、导气性高。(3)次生油松林初始入渗速率均比较大,稳定入渗速率值较小,说明该林分的土壤渗水性能良好,可以起到良好的水分存储效果;人工油松林初渗速率比较大,而稳渗速率处于较高水平,说明该林分土壤存储水分效果差,该样地为未成林,群落结构尚不完善,土壤储水效果有待提高。
The water conservation capacity of Pinus tabulaeformis soil layer in the upper reaches of Xiong’an new area was studied.The results show that:(1)soil bulk density of P.tabulaeformis secondary forest was gradually bigger and bigger with the soil depth increasing,indicating that water permeability of shallow soil was better,and water retention of deep soil was good.The rainfall in rainy season supplied to the root well.The soil bulk density of artificial P.tabulaeformis forest decreased first and then increased with the increase of soil depth.(2)The capillary porosity,non-capillary porosity and total porosity of secondary P.tabulaeformis forest decreased gradually with the increase of soil depth;the capillary porosity and total porosity of artificial P.tabulaeformis forest increased with the increase of soil depth,and the non-capillary porosity decreased with the increase of soil depth,indicating that the water and gas conductivity of deep soil was high.(3)The initial infiltration rate of secondary P.tabulaeformis forest was relatively large,and the stable infiltration rate was small,indicating that the stand had good soil water permeability and can play a good water storage effect.The initial infiltration rate of artificial P.tabulaeformis forest was relatively large,while the steady infiltration rate was at a high level,indicating that the soil water storage effect of the forest was poor,the sample plot had not formed a forest,the community structure was not perfect,and the effect of soil water storage needed to be improved.
作者
郭宾良
Guo Binliang(HebeiAgricultural University of,Baoding 071000,Hebei;Baoding Forest Seedling Management Station,Baoding 071000,Hebei)
出处
《防护林科技》
2022年第4期49-51,共3页
Protection Forest Science and Technology
基金
2020年河北省中央财政林业科技推广示范项目“雄安新区上游油松林健康经营技术示范区建设”(冀SFQ〔2020〕004号)。
关键词
雄安新区
油松林
土壤层
物理性质
Xiong’an new area
Pinus tabulaeformis forest
soil layer
physical property
