Fractions and spatial distributions of agricultural riparian soil phosphorus in a small river basin of Taihu area, China

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2017-01-01 DOI:10.1080/09542299.2017.1286951

J. Qian, M. Shen, Peifang Wang, Chao Wang, Kun Li, Jingjing Liu, X. Tian, Bianhe Lu

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引用次数: 5

Abstract

Abstract Soil samples were collected from three different ranks riparian soil profiles in a small river basin of Taihu area in China. The method of modified Hedley phosphorus sequential fraction was employed to characterize soil phosphorus fractions. The results showed that the riparian soil total phosphorus (TP) contents, organic phosphorus (OP) and inorganic phosphorus (IP) of the basin ranged from 234.98 to 542.29, 49.76 to 73.81, 161.17 to 492.54 mg kg−1, respectively. HCl-Pi, NaOH-Pi and residual Pi were the major part of IP, accounting for 28, 28 and 26% of IP respectively, but NaHCO3-Pi was accounted for 18% of IP. Overall, the various forms of phosphorus, except for Residual P, had a decreasing trend with soils depth. The vertical distributions of TP and IP had same rank order (Riparian Hejiabang > Riparian wuxidang > Riparian Yincungang), while the opposite trend was observed for OP. Surface soils in Riparian Yincungang had lower SOM (soil organic matters):OP ratios than Riparian Wuxidang and Riparian Hejiabang, reflecting the higher probability of OP mineralization in uncultivated soils. Besides, there was significant correlation between phosphorus fractions and SOM, bulk density and capillary porosity.

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太湖地区小流域农业河岸土壤磷含量及空间分布

摘要在中国太湖地区的一个小流域，从三个不同等级的河岸土壤剖面上采集了土壤样品。采用改良的赫德利磷序列分数法对土壤磷组分进行了表征。结果表明，该流域河岸土壤总磷（TP）、有机磷（OP）和无机磷（IP）含量分别为234.98～542.29、49.76～73.81、161.17～492.54 mg kg−1。HCl Pi、NaOH Pi和残留Pi是IP的主要组成部分，分别占IP的28%、28%和26%，而NaHCO3 Pi占IP的18%。总的来说，除残留磷外，各种形态的磷都随着土壤深度的增加而呈下降趋势。TP和IP的垂直分布具有相同的等级顺序（河家浜河岸边>吴溪荡河岸边>银村岗河岸边），而OP则相反。银村岗海岸边表层土壤的SOM:OP比吴溪荡和河家浜海岸边低，反映出OP在未开垦土壤中矿化的可能性更高。此外，磷组分与SOM、堆积密度和毛细管孔隙度之间存在显著相关性。

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

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.