摘要
为探究水源涵养林在水质净化中的作用,以安徽合肥蜀山区张公塘水库水源涵养林为研究对象,利用人工模拟降水(酸性和正常),研究不同林分类型(阳坡刺槐林、阴坡柳树林、阳坡柳树林)的林下植被降水吸附量,及其对水样pH及总氮、总磷浓度和土壤pH的影响。结果表明,正常降水条件下,阳坡刺槐林、阴坡柳树林、阳坡柳树林的林下植被及枯枝落叶吸附水量分别为2.505、1.206和1.128 kg/m^(2);酸性降水条件下,阳坡刺槐林、阴坡柳树林、阳坡柳树林的地表水与30 cm土层渗透水pH大小依次为阳坡刺槐林>阴坡柳树林>阳坡柳树林。酸性和正常降水条件下,刺槐林渗透水中总氮浓度低于柳树林,阴坡柳树林的总氮浓度低于阳坡柳树林,总磷浓度相差不明显;表层和淋溶层土壤pH大小依次为阳坡刺槐林>阴坡柳树林>阳坡柳树林。综合表明,3种林分对水质的净化效果强弱依次为阳坡刺槐林>阴坡柳树林>阳坡柳树林,研究为水源涵养林的规划建设提供参考。
To explore the role of water conservation forests in water quality purification,the water conservation forest of Zhanggongtang Reservoir in Shushan District,Hefei City,Anhui Province was taken as the research object,artificial simulated precipitation(acidic and normal precipitation)was used to study the precipitation adsorption capacity of the undergrowth vegetation of different forest types(sunny slope Robinia pseudoacacia forest,shady slope Salix forest,and sunny slope Salix forest),and its influence on the pH of water,the concentrations of total nitrogen and total phosphorus,and soil pH.The results showed that under normal precipitation conditions,the water interception capacity of understory vegetation and litter in sunny slope R.pseudoacacia forest,shady slope Salix forest,and sunny slope Salix forest were 2.505,1.206,and 1.128 kg/m^(2),respectively.Under acidic precipitation conditions,the pH of surface water and 30 cm soil infiltration water followed the order:sunny slope R.pseudoacacia forest>shady slope Salix forest>sunny slope Salix forest.Under acidic and normal precipitation conditions,the total nitrogen concentration in infiltration water was lower in R.pseudoacacia forests than in Salix forests,with shady slope Salix forests exhibiting lower total nitrogen levels than sunny slope Salix forests,while total phosphorus concentrations showed no significant differences;the pH values of the surface and leached layers of the soil were in the following order:sunny slope R.pseudoacacia forest>shady slope Salix forest>sunny slope Salix forest.In conclusion,the water purification efficiency of the three forest types ranked as follows:sunny slope R.pseudoacacia forest>shady slope Salix forest>sunny slope Salix forest.These findings provide references for the planning and management of water conservation forests.
作者
刘玉凤
LIU Yufeng(Anhui Vocational and Technical College of Forestry,Hefei 230036,China)
出处
《安徽农学通报》
2025年第14期103-106,共4页
Anhui Agricultural Science Bulletin
基金
安徽省教育厅自然科学研究重点项目“合肥市湿地水源涵养林对水质净化的作用研究”(2022AH052727)。
关键词
水源涵养林
水质净化
刺槐林
柳树林
water conservation forest
water quality purification
Robinia pseudoacacia forest
Salix forest
