观赏桃林地土壤物理特性及其水分生态效益

目的]研究桃花林下土壤水分物理特性和水分生态效益,为桃林的种植管理及发展提供理论依据。方法]以南宁青秀山风景区桃花岛林分土壤为对象,研究不同土层和不同土壤剖面的厚度、土壤容重、最大持水量、毛管持水量、最小持水量、毛管孔隙度、非毛管孔隙度和总孔隙度。结果]与一般土壤物理性质标准相比,桃林地整体表层土壤略紧实,土壤孔隙度在良好范围内,水–气关系协调。在0~1 m土层,土壤持水能力随土层深度的增加而降低。0~1 m土层桃花林地总持水量为4 601.3 m3/hm~2;桃花岛的土壤储水总量为62 117.6 m3,采用效益替代计算,桃花岛土壤水分生态效益总货币价值为74 541.12元。结论]林地土层深度对土壤孔隙度状况及持水性能有一定的影响,桃花林地具有一定的水分生态效益。

Soil Physical Properties and Water Ecological Benefits of Prunus persica L.Forest

Objective] To research the soil physical properties and water ecological benefits of Prunus persica forest,and to provide theoretical foundation for the planting management and development of P.persica forest. Method] With forest soil of peach island on Nanning Qingxiu Moun-tain Scenic Spot as the research object,we researched the thickness,soil bulk density,maximum water holding capacity,capillary water holding ca-pacity,minimum water holding capacity,capillary porosity,non capillary porosity,and total capillary porosity in each soil profile at each soil layer. Result] Compared with the standard of general soil physical properties,soil from P.persica forest had relatively compact surface soil,its soil po-rosity was within the range of good;and relationship between water and gas was harmonious.Within the soul layer of 0-1 m,soil water storage a-bility reduced as the soil depth increased;the total water holding capacity of P.persica forest land was 4 601.3 m3/hm2 .Soil water holding ca-pacity of P.persica island was 62 117.6 m3 .Calculated by the method of benefit alternation,the total monetary value of soil water ecological bene-fits of P.persica island was 74 541.12 Yuan.Conclusion] Soil depth of forest land has certain impacts on the soil porosity status and water hold-ing capacity;P.persica forest has certain water ecological benefits.