文章摘要
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 Patterns of Longji Terrace on Soil Water Holding Capacity
投稿时间:2021-12-01  修订日期:2022-03-04
DOI:
中文关键词: 土地利用  土壤持水力  土壤容重  龙脊梯田
英文关键词: land use  water holding capacity  soil bulk density  Longji terrace
基金项目:漓江流域喀斯特景观资源可持续利用关键技术研发与示范(2019YFC0507500);桂林市科学研究与技术开发计划重大专项(20180102-2)
作者单位邮编
朱学莲 桂林理工大学 541004
王凯杰 桂林理工大学 
徐德兰 桂林理工大学 541006
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中文摘要:
      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,通过对其林地、旱地、水田和抛荒地4种土地利用模式0~5cm表层土壤的物理性质进行研究,分析各类土地表层土壤的持水能力。结果表明,4种土地利用模式表层土壤的土壤容重范围为0.45~1.02g/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%。通过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)。土壤最大持水率依次表现为:林地>抛荒地>水田>旱地。
英文摘要:
      The study on soil water-holding capacity of Longji terraced fields can provide theoretical basis for ecological protection and environmental control in this area. Taking Jinkeng Hongyao Scenic Spot in Longji Terrace as an object, the physical properties of 0 ~ 5 cm surface soil under four land use patterns of woodland, dry land, paddy field and abandoned land were studied, and the water holding capacity of surface soil of various lands was analyzed. The results showed that the surface soil bulk density of the 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 correlation analysis showed that the maximum water holding capacity of surface soil of all kinds of land was negatively correlated with soil bulk density (r = -0.911, P < 0.01), positively correlated with soil non-capillary porosity (r = 0.839, P < 0.01) and positively correlated with vegetation coverage (r= 0.583, P < 0.01). The maximum water-holding rate of soil is as follows: forest land > abandoned land > paddy field > dry land.
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