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Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China
Yidong Wang;  Zhong-Liang Wang;  Xiaoping Feng;  Changcheng Guo;  Qing Chen
2014
Source PublicationPLOS ONE
Volume9Issue:4Pages:1-7
Abstract

Over the past six decades, coastal wetlands in China have experienced rapid and extensive agricultural reclamation. In the context of saline conditions, long-term effect of cultivation after reclamation on soil chemical properties has not been well understood. We studied this issue using a case of approximately 60-years cultivation of a coastal saline marsh in Bohai Rim, northern China. The results showed that long-term reclamation significantly decreased soil organic carbon (SOC) (242.2%) and total nitrogen (TN) (225.8%) at surface layer (0–30 cm) as well as their stratification ratios (SRs) (0–5 cm:50–70 cm and 5–10 cm:50–70 cm). However, there was no significant change in total phosphorus (TP) as well as its SRs under cultivation. Cultivation markedly reduced ratios of SOC to TN, SOC to TP and TN to TP at surface layer (0–30 cm) and their SRs (0– 5 cm:50–70 cm). After cultivation, electrical conductivity and salinity significantly decreased by 60.1% and 55.3% at 0– 100 cm layer, respectively, suggesting a great desalinization. In contrast, soil pH at 20–70 cm horizons notably increased as an effect of reclamation. Cultivation also changed compositions of cations at 0–10 cm layer and anions at 5–100 cm layer, mainly decreasing the proportion of Na+ , Cl2 and SO4 22. Furthermore, cultivation significantly reduced the sodium adsorption ratio and exchangeable sodium percentage in plow-layer (0–20 cm) but not residual sodium carbonate, suggesting a reduction in sodium harm.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/9298
Collection环境地球化学国家重点实验室
Affiliation1.Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
3.College of Urban and Environmental Sciences, Tianjin Normal University, Tianjin, China
Recommended Citation
GB/T 7714
Yidong Wang;Zhong-Liang Wang;Xiaoping Feng;Changcheng Guo;Qing Chen. Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China[J]. PLOS ONE,2014,9(4):1-7.
APA Yidong Wang;Zhong-Liang Wang;Xiaoping Feng;Changcheng Guo;Qing Chen.(2014).Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China.PLOS ONE,9(4),1-7.
MLA Yidong Wang;Zhong-Liang Wang;Xiaoping Feng;Changcheng Guo;Qing Chen."Long-Term Effect of Agricultural Reclamation on Soil Chemical Properties of a Coastal Saline Marsh in Bohai Rim, Northern China".PLOS ONE 9.4(2014):1-7.
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