Spatial and seasonal variation of salt ions under the influence of halophytes,in a coastal flat in eastern China |
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| Authors: | Yanyou Wu Rongcheng Liu Yuguo Zhao Pingping Li Congqiang Liu |
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| Institution: | (1) Jiangsu Provincial Key Laboratory of Modern Agricultural Equipment and Technology, Institute of Agricultural Engineering, Jiangsu University, Zhenjiang, 212013, China;(2) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China |
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| Abstract: | The high salinity of coastal saline field is a key factor limiting the reclamation. Halophytes have been utilized in the reclamation
of saline land. The study area is in Yancheng, China. An analysis of the concentrations of Rb, Cs, Sr, and Ba, the ratio of
Rb/Cs, and Sr/Ba in soils in autumn shows that the soil of this study area has great homogeneity. Artemisia halodendron, Gossypium hirsutum, and Sesbania cannabina were selected as the reclamation plants in the present study. In order to know the spatial-temporal distribution of soil
salinity, the influence of plant-specific vegetation, and the difference of desalination among these halophytes in coastal
flat, the authors analyze the soil-layers and seasonal variation in salt ions. Sodium chloride was accumulated in 0–5 cm topsoil
with no vegetation during the winter and spring. The effect of desalinization of halophytes is significant. Of the three plant
species, Sesbania cannabina has the greatest desalinization. The difference of ions composition of soils covered with various plant species is significant.
It can be concluded that halophytes have better amelioration of coastal soil salinity. Special attention should be paid to
the selection of plant species and measures to plant and cultivate crops in the reclamation of saline land. |
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| Keywords: | Artemisia halodendron Coastal flat Gossypium hirsutum Ions composition Sesbania cannabina Salinity |
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