Terraces and landscape in Mixteca Alta, Oaxaca, Mexico: Micromorphological indicators

IF 2 Q3 SOIL SCIENCE

Spanish Journal of Soil Science Pub Date : 2018-07-13 DOI:10.3232/SJSS.2018.V8.N2.05

B. Castillo, G. Bocco

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引用次数: 3

Abstract

In the semi-arid Mixteca Alta, Mexico, complex societies developed sophisticated terrace systems to control erosion and improve rain-fed agriculture. Knowledge regarding the agricultural systems has been crucial in understanding landscape construction through cultivation and social complexity. In this study six sequences on terrace systems were investigated. The samples were analyzed for bulk chemical, textural and micromorphological observations. Soils developed on terraces of the Yanhuitlán river (sequences Y04 and Y05) were dated, respectively, 5,300, 2,700 and 1,100 cal BP, suggesting a possible anthropic use since the early Formative period. These soils are composed of microstratified fine sediments of local origin, reflecting low energy during their deposition; they are weakly structured and developed in anoxic conditions due to saturation during terrace flooding. However, in these soils, a mixture of silt particles and charcoal fragments suggests the influence of anthropic use. On the other hand, sequences Y01 and Y02 are Pleistocene soils developed in an anoxic environment of a swampy landscape; their vertic properties may be related to dry seasonal periods. Knowledge of landscape genesis contributes to the assessment of anthropic impact in the area.

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墨西哥瓦哈卡州Mixteca Alta的梯田和景观：微观形态指标

在墨西哥半干旱的Mixteca Alta，复杂的社会发展了复杂的梯田系统，以控制侵蚀并改善雨水灌溉的农业。关于农业系统的知识对于理解通过耕种和社会复杂性进行的景观建设至关重要。在本研究中，研究了阶地系统上的六个序列。对样品进行了整体化学、结构和微观形态观察分析。Yanhuitlán河阶地上发育的土壤（序列Y04和Y05）的年代分别为5300、2700和1100卡BP，表明自形成早期以来可能存在人为用途。这些土壤由当地来源的微地层细沉积物组成，在沉积过程中反映出低能量；它们结构较弱，在缺氧条件下发育，这是由于阶地洪水期间的饱和。然而，在这些土壤中，淤泥颗粒和木炭碎片的混合物表明了人类使用的影响。Y01和Y02序列是在沼泽地缺氧环境中发育的更新世土壤；它们的垂直特性可能与旱季有关。景观成因知识有助于评估该地区的人类影响。

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来源期刊

Spanish Journal of Soil Science SOIL SCIENCE-

CiteScore

2.20

自引率

0.00%

发文量

期刊介绍： The Spanish Journal of Soil Science (SJSS) is a peer-reviewed journal with open access for the publication of Soil Science research, which is published every four months. This publication welcomes works from all parts of the world and different geographic areas. It aims to publish original, innovative, and high-quality scientific papers related to field and laboratory research on all basic and applied aspects of Soil Science. The journal is also interested in interdisciplinary studies linked to soil research, short communications presenting new findings and applications, and invited state of art reviews. The journal focuses on all the different areas of Soil Science represented by the Spanish Society of Soil Science: soil genesis, morphology and micromorphology, physics, chemistry, biology, mineralogy, biochemistry and its functions, classification, survey, and soil information systems; soil fertility and plant nutrition, hydrology and geomorphology; soil evaluation and land use planning; soil protection and conservation; soil degradation and remediation; soil quality; soil-plant relationships; soils and land use change; sustainability of ecosystems; soils and environmental quality; methods of soil analysis; pedometrics; new techniques and soil education. Other fields with growing interest include: digital soil mapping, soil nanotechnology, the modelling of biological and biochemical processes, mechanisms and processes responsible for the mobilization and immobilization of nutrients, organic matter stabilization, biogeochemical nutrient cycles, the influence of climatic change on soil processes and soil-plant relationships, carbon sequestration, and the role of soils in climatic change and ecological and environmental processes.