龙脊梯田土地利用模式对土壤持水力影响研究  

Study on the Influence of Land Use Pattern on Soil Water Holding Capacity in Longji Terrace

作　　者：徐德兰 朱学莲 王凯杰 XU Delan;ZHU Xuelian;WANG Kaijie(Collage of Tourism and Landscape Architecture,Guilin University of Technology,Guilin 541004,China;Institute of Guangxi Tourism Industry,Guilin 541004,China)

机构地区：[1]桂林理工大学旅游与风景园林学院,广西桂林541004 [2]广西旅游产业研究院,广西桂林541004

出　　处：《安徽建筑大学学报》2023年第2期40-44,50,共6页Journal of Anhui Jianzhu University

基　　金：国家重点研发计划项目(2019YFC0507500);桂林市科学研究与技术开发计划重大专项项目(20180102-2)。

摘　　要：土壤水分是土壤生态系统中养分循环与流动的重要载体,是植物生长及生态环境建设的关键影响因子。以龙脊梯田金坑红瑶景区为对象,研究其林地、旱地、水田和抛荒地4种土地利用模式0~5 cm表层土壤的物理性质,分析各类土地表层土壤的持水能力。结果表明,4种土地利用模式下,表层土壤的土壤容重范围为0.45~1.02 g/cm3,最大持水率范围为42.12%~90.92%,土壤非毛管孔隙度范围为18.93%~43.62%。Spearman相关性分析表明,各类土地表层土壤的最大持水率与土壤容重呈极显著负相关(r=-0.911,P <0.01),与土壤非毛管孔隙度呈极显著正相关(r=0.839,P <0.01),与植被覆盖度呈一般显著正相关(r=0.583,P <0.05)。土壤最大持水率排序依次为:林地>抛荒地>水田>旱地。Soil moisture is an important carrier of nutrient cycling in the soil ecosystem,and is a key influencing factor for plant growth and ecosystem construction.Taking Jinkeng Hongyao Scenic Spot in Longji Terrace as an object,the physical properties of surface soil(0~5 cm depth)under four land use patterns:woodland,dry land,paddy field and abandoned farm field were studied to analyze their water holding capacity.The results show that the bulk density of surface soil under four land use patterns ranged from 0.45 to 1.02 g/cm3;the maximum water holding capacity ranged from 42.12%to 90.92%;the soil non-capillary porosity ranged from 18.93%to 43.62%.Spearman’s correlation analysis shows that for the surface soil of four land use patterns,the maximum water holding capacity has an highly negative correlation with bulk density(r=-0.911,P<0.01),an highly positive correlation with soil air-filled porosity(r=0.839,P<0.01)and an positive correlation with vegetation coverage(r=0.583,P<0.01).The maximum water-holding rate of soil is as follows:forest land>abandoned farm field>paddy field>dry land.

关 键 词：土地利用 土壤持水力 最大持水率 龙脊梯田 

分 类 号：S152.7[农业科学—土壤学]