Exploring the Soil Structure Analysis of a Subtropical Watershed by Introducing a Blanket Physico‐Hydraulic Health Index

IF 3.6 2区 农林科学 Q2 ENVIRONMENTAL SCIENCES Land Degradation & Development Pub Date : 2024-10-29 DOI:10.1002/ldr.5326
Angelo Garcia Costa, Mauricio Fornalski Soares, Marília Alves Brito Pinto, Miguel David Fuentes‐Guevara, Rômulo Félix Nunes, Douglas Rodrigo Kaiser, Robson André Armindo, Luis Carlos Timm
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Abstract

Multiple disturbed and undisturbed soil samples were collected to assess the soil structure health in support of water use and management in a subtropical watershed, which is composed of shallow Entisols, near to Canguçu, RS state—Brazil. Various physico‐hydraulic properties related to soil structure, such as bulk density, total, micro and macroporosity, saturated hydraulic conductivity, organic carbon, soil water retention curve (SWRC), and the ranges of plant available water (PAWC) and drainable porosity (DP) were measured to be analyzed. The hydraulic‐energy indices of soil aeration and water retention were determined by integrating the areas under SWRC. Combining these properties with the contents of sand and clay, a unique blanket soil physico‐hydraulic health index (BSPHI) was formulated and applied to investigate the impact of land use and management on the soils of the Ellert Creek Watershed (ECW), thereby supporting soil physical health analysis and, consequently, the analysis of water and human health. The favorable outcomes found in the ECW soils under annual crops indicated good root aeration in the surface layer due to the balance between DP and PAWC. The BSPHI results showed that only about 19% of the areas exhibited unhealthy physical health. The soil structure in pasture areas of ECW was not significantly impacted by the extensive cattle grazing, whereas lands under native forest served as a control for the natural soil quality status. The BSPHI successfully captured small changes in soil structure, regardless of land use and management, highlighting its potential as a promising tool for evaluating soil health by assessing the soil physical quality.
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通过引入毯状物理-水力健康指数探索亚热带流域的土壤结构分析
我们采集了多个受干扰和未受干扰的土壤样本,以评估亚热带流域的土壤结构健康状况,该流域由浅层 Entisols 组成,靠近巴西 RS 州的 Canguçu。测量分析了与土壤结构相关的各种物理-水力特性,如容重、总孔隙度、微孔和大孔隙度、饱和导水率、有机碳、土壤保水曲线(SWRC)、植物可用水量(PAWC)和可排水孔隙度(DP)的范围。通过整合 SWRC 下的面积,确定了土壤通气和保水的水能指数。结合这些特性以及砂和粘土的含量,制定并应用了独特的一揽子土壤物理-水力健康指数(BSPHI),以研究土地利用和管理对埃勒特溪流域(ECW)土壤的影响,从而支持土壤物理健康分析,进而支持水和人类健康分析。在种植一年生作物的 ECW 土壤中发现的有利结果表明,由于 DP 和 PAWC 之间的平衡,表层根系通气性良好。BSPHI 结果表明,只有约 19% 的地区表现出不健康的物理健康状况。ECW牧场地区的土壤结构没有受到大面积放牧的明显影响,而原生林地则是自然土壤质量状况的对照。BSPHI 成功地捕捉到了土壤结构的微小变化,而与土地使用和管理无关,这凸显了它作为一种通过评估土壤物理质量来评价土壤健康状况的工具的潜力。
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来源期刊
Land Degradation & Development
Land Degradation & Development 农林科学-环境科学
CiteScore
7.70
自引率
8.50%
发文量
379
审稿时长
5.5 months
期刊介绍: Land Degradation & Development is an international journal which seeks to promote rational study of the recognition, monitoring, control and rehabilitation of degradation in terrestrial environments. The journal focuses on: - what land degradation is; - what causes land degradation; - the impacts of land degradation - the scale of land degradation; - the history, current status or future trends of land degradation; - avoidance, mitigation and control of land degradation; - remedial actions to rehabilitate or restore degraded land; - sustainable land management.
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