LIU Qixia,LIU Xiaofang,TIAN Xin,et al.Effects of Soil Properties on Preferential Flow Development Under Different Land Use Types in the Lower Reaches of Fenhe River Basin[J].Research of Soil and Water Conservation,2023,30(05):146-153,161.[doi:10.13869/j.cnki.rswc.2023.05.019.]
汾河流域下游不同土地利用方式下土壤性质对优先流发育的影响
- Title:
- Effects of Soil Properties on Preferential Flow Development Under Different Land Use Types in the Lower Reaches of Fenhe River Basin
- 文章编号:
- 1005-3409(2023)05-0146-08
- Keywords:
- preferential flow; dye tracer; multi-index evaluation; soil physical and chemical properties
- 分类号:
- S152; S153; S157.1
- 文献标志码:
- A
- 摘要:
- [目的]揭示汾河流域下游不同土地利用方式下土壤理化性质的异质性,阐明其对优先流发育的影响。[方法]以汾河流域下游3种土地利用方式为研究对象进行野外染色示踪试验,评价优先流发育程度,分析了土壤染色区分下优先流区与非优先流区土壤性质的差异及其对优先流特征的影响。[结果]不同土地利用方式下优先流评价指数表示的优先流发育程度高低依次为草地(1.18)、农地(1.12)和果园(0.88)。土地利用方式、土层和优先流区域对除pH外的土壤性质有显著(p<0.05)的影响。土壤有机质、总孔隙度、毛管孔隙度和饱和导水率的提高和容重的降低有助于优先流的发育。多元逐步回归分析表明,优先流区的有机质和总孔隙度是影响染色面积比的主要影响因子,非优先流区的有机质、容重、砂粒是影响非染色面积比的主要影响因子。[结论]相比农地和果园,草地土壤理化性质在土层以及优先流路径间的异质性更高,对优先流发育程度影响较大。
- Abstract:
- [Objective] This paper reveals the heterogeneity of physical and chemical properties in soils under different land use patterns in the lower reaches of Fenhe River basin, and expounds its influence on the development of preferential flow. [Methods] Three land use types in the lower reaches of the Fenhe River basin were selected in the field staining and tracing experiments to evaluate the development degree of preferential flow and analyze the differences of soil properties between preferential flow areas and non-preferential flow areas and their effects on preferential flow characteristics. [Results] The development degrees of preferential flow indicated by the index of preferential flow under different land use types were grassland(1.18), cropland(1.12)and orchard(0.88), respectively. Soil properties other than pH were significantly affected by land use types, soil layers, and preferential flow areas(p<0.05). The increase of soil organic matter, total porosity, capillary porosity and saturated hydraulic conductivity, and the decrease of bulk density contributed to the development of preferential flow. The multiple stepwise regression analysis showed that the organic matter and total porosity in preferential flow areas were the main factors affecting the dyeing area ratio, while the organic matter, bulk density and sand particles in non-preferential flow areas were the main factors affecting the non-dyeing area ratio. [Conclusion] Compared with farmland and orchard, the soil physical and chemical properties of grassland have higher heterogeneity in soil layers and preferential flow areas, which has a greater impact on the development of preferential flow.
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备注/Memo
收稿日期:2022-08-27 修回日期:2022-09-14
资助项目:国家自然科学基金项目(42007064); 山西省研究生教育创新项目(2021Y482)
第一作者:刘啟霞(1996—),女,山西怀仁人,硕士研究生,主要从事植被恢复效应研究。E-mail:1635319312@qq.com
通信作者:刘小芳(1981—),女,山西榆次人,博士,副教授,主要从事植物生理生态研究。E-mail:liuxiaofang04@163.com