Effect of reclamation time and land use on soil properties in Changjiang River Estuary, China

Sun, Yani; Li, Xiuzhen; Mander, Ülo; He, Yongtao; Jia, Yangwen; Ma, Zhen; Guo, Wen‐Yong; Xin, Zaijun

doi:10.1007/s11769-011-0482-0

Cited by 57 publications

(32 citation statements)

References 20 publications

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“…For nitrate nitrogen and available P, the contents showed an initial increase, followed by a decrease over time, with 55 years being the turning point. Similar results were also reported in coastal reclaimed soils of Eastern China [8]. Overall, fertilizer application may also cause the soil nutrient contents to increase obviously, especially in the first 25 years of reclamation, while the tendency is to remain unchanged or even decrease after the 85 years in our study.…”

Section: Variance Analysis For Soil Properties In Different Zonessupporting

confidence: 90%

“…Numerous studies of reclamation-induced changes in soil function have therefore been conducted. Portnoy and Giblin [7] and Sun et al [8] found that soil bulk density tended to increase, while soil moisture, electrical conductivity, and particle size tended to decrease during reclamation. Li et al [9] have suggested that soil nutrient distribution was significantly affected by land-use intensity after land had been reclaimed, with relatively high soil salinity in aquaculture ponds and high soil organic matter (SOM), available phosphorous (AP), and nitrate nitrogen (NO 3 − -N) contents in agricultural fields.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Land Reclamation on Distribution of Soil Properties and Heavy Metal Concentrations, and the Associated Environmental Pollution Assessment

Yan¹,

Hu²,

Chang³

et al. 2017

Pol. J. Environ. Stud.

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We used the "space for time substitution" method to test the effects of reclamation history on evolution processes of soil properties and heavy metal concentrations. A total of 129 surface soil samples were collected in a reclamation zone of the Liaohe River Delta, which was divided into three reclaimed zones (1930s, 1960s, and 1990s), marsh, and intertidal flats. Soil metals (Fe, Mn, Cd, Cr, Cu, Ni, Pb, and Zn), soil particle size, pH, salinity, soil organic carbon (SOC), nitrate nitrogen (NO 3 --N), and available phosphorus (AP) were analyzed. Results obtained from correlation analysis and factor analysis showed that there were significant positive correlations (p<0.01) between the fine particle fractions (clay and silt) and metal concentrations. Using ANOVA, we found that soil erosion and leaching desalination had significant effects on the distributions of soil properties and heavy metal contents in short-term reclamation (1990s zone), and that sustained human activities have played an important role in long-term reclamation (1960s zone). Results of the enrichment factor (EF) and inverse distance weighting (IDW) indicated that Cd pollution had reached high pollution levels, followed by Cr pollution. Taking necessary measures is significant for sustainable utilization and management of coastal resources.

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Section: Variance Analysis For Soil Properties In Different Zonessupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Effects of Land Reclamation on Distribution of Soil Properties and Heavy Metal Concentrations, and the Associated Environmental Pollution Assessment

Yan¹,

Hu²,

Chang³

et al. 2017

Pol. J. Environ. Stud.

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“…Land use change is always accompanied by changes in soil physical–chemical properties (Sun et al, 2011). It is widely argued that the SOC increases as soil BD decreases, because of the increase in soil porosity and soil aggregate stability (Whalen et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Effect of Cultivation on Dynamics of Organic and Inorganic Carbon Stocks in Songnen Plain

et al. 2014

Agronomy Journal

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e accurate estimation of soil C stock is important for understanding the global C cycles. Particularly in arid regions, quanti cation of soil inorganic carbon (SIC) is required in addition to the more frequently reported soil organic carbon (SOC). We analyzed SOC, SIC, soil bulk density (BD), electrical conductivity (EC) and pH of alkali-saline soils at a 0-to 100-cm depth in a cultivation chronosequence that consisted of a meadow steppe site and four cropped sites with maize (Zea mays L.) for 1, 7, 17, and 24 yr in Songnen Plain, Northeast China to quantify SOC and SIC dynamics. Results showed that SOC stock in 0 to 100 cm soil was 92.3, 83.7, 80.9, 78.2, and 76.9 Mg C ha -1 for Steppe, Crop-1Y, Crop-7Y, Crop-17Y, and Crop-24Y, respectively, decreased at a rate of 3.63 Mg C ha -1 yr -1 . In contrast, SIC stock, ranging from 159.0 to 179.4 Mg C ha -1 increased at a rate of 0.53 Mg C ha -1 yr -1 in 0-to 100-cm depth. e soil total carbon (STC) stock increased at a rate of 0.46 Mg C ha -1 yr -1 following land use conversion, peaked in the seventh year of cultivation and then declined at a rate of 0.89 Mg C ha -1 yr -1 . e SOC concentrations were negatively correlated with BD, EC, and pH, but SIC concentrations were positively correlated with soil BD, EC, and pH. e ndings underline the importance of including SIC in the soil C estimates while considering deep soil pro le and longer cultivation period.

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“…Ninety percent of the entire coastline along the Jiangsu coast is tidal flat [54]. Research shows that the coastal tidal flat is currently expanding seaward at a rate of ±20 cm per year [55][56][57]. The study area, which is about 0.38 million ha, including part of the Yellow Sea and South Yellow Sea Radial Sand Ridges, is located in the central part of the coastal zone of Jiangsu Province (Figure 2).…”

Section: Study Areamentioning

confidence: 99%

Ecological Security and Ecosystem Services in Response to Land Use Change in the Coastal Area of Jiangsu, China

Liu

Zhu

et al. 2016

Sustainability

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Urbanization, and the resulting land use/cover change, is a primary cause of the degradation of coastal wetland ecosystems. Reclamation projects are seen as a way to strike a balance between socioeconomic development and maintenance of coastal ecosystems. Our aim was to understand the ecological changes to Jiangsu's coastal wetland resulting from land use change since 1977 by using remote sensing and spatial analyses. The results indicate that: (1) The area of artificial land use expanded while natural land use was reduced, which emphasized an increase in production-orientated land uses at the expense of ecologically important wetlands; (2) It took 34 years for landscape ecological security and 39 years for ecosystem services to regain equilibrium. The coastal reclamation area would recover ecological equilibrium only after a minimum of 30 years; (3) The total ecosystem service value decreased significantly from $2.98 billion per year to $2.31 billion per year from 1977 to 2014. Food production was the only one ecosystem service function that consistently increased, mainly because of government policy; (4) The relationship between landscape ecological security and ecosystem services is complicated, mainly because of the scale effect of landscape ecology. Spatial analysis of changing gravity centers showed that landscape ecological security and ecosystem service quality became better in the north than the south over the study period.

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Effect of reclamation time and land use on soil properties in Changjiang River Estuary, China

Abstract: The objective of this study is to analyze soil physical and chemical properties, soil comprehensive functions and impact factors after different years of reclamation.

Cited by 57 publications

References 20 publications

Effects of Land Reclamation on Distribution of Soil Properties and Heavy Metal Concentrations, and the Associated Environmental Pollution Assessment

Effects of Land Reclamation on Distribution of Soil Properties and Heavy Metal Concentrations, and the Associated Environmental Pollution Assessment

Effect of Cultivation on Dynamics of Organic and Inorganic Carbon Stocks in Songnen Plain

Ecological Security and Ecosystem Services in Response to Land Use Change in the Coastal Area of Jiangsu, China

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