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Spatial Patterns of Organic Chlorine and Chloride in Farmland and Forest Soil in the Meicun Area, South East China
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Institute of Soil Science, Academica Sinica, Nanjing, P.R. China.
Institute of Soil Science, Academica Sinica, Nanjing, P.R. China.
Linköping University, The Tema Institute. Linköping University, Faculty of Arts and Sciences.
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

The concentration and storage of organic chlorine and chloride were determined in topsoil in a coniferous forest soil and a paddy soil at a sampling site in the Meicun area, Anhui Province, P.R. China. Also, the spatial distribution of the two forms of chlorine was determined and linear interpolation was used to construct contour maps of the concentrations. Soil samples were collected at 55 of the nodes in a grid with approximately 120 m between the nodes. In all, 27 samples from the forest and 28 from the paddy soil were collected and analyzed with respect to chloride, organic chlorine, organic carbon, pH, total nitrogen,ammonium and nitrate.

The concentration of organic chlorine was at both sites significantly lower than that of chloride. Furthermore, the concentration of organic chlorine was significantly lower in the paddy as compared to the forest soil whereas the concentration of chloride did not differ significantly.

The analysis of spatial variability suggested that no spatial correlation between the nearest sampling points and those further away were at hand. The contour maps indicated that the distribution pattern of organic chlorine in the forest soil was similar to the distribution of organic carbon, the highest and lowest concentrations of each occurring at about the same locations in the grid. The distribution of chloride showed a different pattern where the highest concentrations coincided with the most elevated parts of the hill. No clear patterns were observed for the three variables in the paddy field.

Keyword [en]
Organic chlorine, chloride, spatial distribution, soil
National Category
Social Sciences Interdisciplinary
URN: urn:nbn:se:liu:diva-79137OAI: diva2:538390
Available from: 2012-06-29 Created: 2012-06-29 Last updated: 2012-06-29Bibliographically approved
In thesis
1. Organic chlorine and chloride in soil
Open this publication in new window or tab >>Organic chlorine and chloride in soil
2000 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Chloride is generally believed to be conservative with respect to water and is often used as atracer of water movement in hydrological research and biogeochemical modeling. However,the last decade of research has shown that naturally fanned organically bound chlorine isubiquitous in the environment. The turnover of such compounds has previously not been putin relation to the geochemical cycle of chloride.

The aim of this thesis was to examine and compare the distribution of organically bound chlorine and chloride in soil. The influence of central soil-forming factors, such as climate, ecosystems and topography were studied and special attention was paid to spatial distribution patterns. Samples were collected in southern Sweden and in the Anhui province in China. The former is situated in the temperate region and the latter in the subtropical region.

The results show that the storage of organic chlorine in the Swedish soils was 2-4 times larger than the chloride storage. This suggest that the storage of organic chlorine in forest soils with a moderate chloride deposition in the temperate region is of such size that even small changes in this storage are likely to have a considerable impact on the transport of chloride. In contrast, the size of the storage of organic chlorine in the Chinese soils was 2 times smaller than the storage of chloride. The storage is still of such size that it cannot be excluded thatchanges in this storage influence the transport of chloride.

It was also found that the concentration of both forms of chlorine varied among different types of ecosystems such as coniferous and deciduous forest soils. In addition, both forms of chlorine appear to vary seasonally with higher concentrations in the winter and lower concentrations in the summer. The spatial distribution pattem of organic chlorine followed that for organic matter in the Chinese forest soil whereas it followed the pattern of chloride in the study of Swedish forest soils.

In conclusion, the occurrence of organically bound chlorine in soil is influenced by factors such as climate, type of ecosystem and the topography. It is suggested that net-changes in the storage of organic chlorine are of importance for the transport of chloride, which implies that the biogeochemical cycle of chlorine should be addressed.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2000. 55 p.
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 210
National Category
Social Sciences Interdisciplinary
urn:nbn:se:liu:diva-35039 (URN)24714 (Local ID)91-7219-724-2 (ISBN)24714 (Archive number)24714 (OAI)
Public defence
2000-09-15, Sal Elysion, Hus-T, Universitetsområdet Valla, Linköping, 10:15 (Swedish)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-09-12Bibliographically approved

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Johansson, EmmaSandén, PerÖberg, Gunilla
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Department of Water and Environmental StudiesFaculty of Arts and SciencesThe Tema Institute
Social Sciences Interdisciplinary

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