Spatial distribution of total phosphorus and organic carbon in the salt-affected soils in the Meyghan Playa, Iran

IF 2 Q3 SOIL SCIENCE

Spanish Journal of Soil Science Pub Date : 2017-11-15 DOI:10.3232/SJSS.2017.V7.N3.01

M. S. Sinegani, A. Sinegani, M. Hadipour

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引用次数: 4

Abstract

Due to widespread and fast-growing urban developments, large amounts of industrial, agricultural, and municipal wastewaters are produced which can change ecosystem functions after being released into rivers and lakes. The distributions of organic carbon (OC) and total phosphorus (TP) of soil were studied in the salt affected soils in the Meyghan Playa, Iran, to show the impacts of human activities on these soils and sediment properties in this arid region of the world. Samples were taken from 250 points and were analyzed geostatistically for electrical conductivity (EC), pH, TP, and OC. Although EC had the highest coefficient of variation (CV = 2.4) compared to CVs of the other soil properties, the sill/nugget ratio for EC in the geostatistical analysis was the highest one. Therefore, EC had the strongest spatial dependence compared to OC, TP, and pH with lower sill/nugget ratios and moderate spatial dependence. The maximum amount of OC was more than 2% which was observed near the entrance of municipal wastewater to the Meyghan Lake, and the highest soil TP was more than 400 kg mg-1 near the entrance of municipal wastewater and also at river mouths, which can be attributed to leaching and runoff fertilizers from farmlands. Enrichment of OC in the entrance of municipal wastewater toward the lake is related to eutrophication and higher plant production.

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伊朗梅甘滩盐渍化土壤中总磷和有机碳的空间分布

由于城市的广泛和快速发展，产生了大量的工业、农业和城市废水，这些废水在排入河流和湖泊后会改变生态系统功能。研究了伊朗Meyghan Playa受盐影响土壤中有机碳（OC）和总磷（TP）的分布，以揭示人类活动对该干旱地区土壤和沉积物性质的影响。从250个点取样，并对电导率（EC）、pH、TP和OC进行地质统计学分析。尽管与其他土壤性质的变异系数相比，EC的变异系数最高（CV=2.4），但地质统计学分析中EC的底坎/块率最高。因此，与OC、TP和pH相比，EC具有最强的空间依赖性，具有较低的门槛/块比率和中等的空间依赖。在Meyghan湖城市污水入口附近观测到的OC最高含量超过2%，在城市污水入口和河口附近的土壤TP最高含量超过400kg mg-1，这可归因于农田的浸出和径流肥料。城市污水入湖口OC的富集与富营养化和较高的植物产量有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.