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Zhang H.-Z.,Hangzhou Park and Cultural Relic Administration | Tang Y.-L.,Hangzhou Park and Cultural Relic Administration | Lu J.,Hangzhou Botanical Garden | Zhou H.,Hangzhou Park and Cultural Relic Administration | And 4 more authors.
Huanjing Kexue/Environmental Science | Year: 2014

Due to the importance as a famous scenic area in China and its special geographical position, heavy metal pollution in soils in Xihu Scenic Area has attracted great concerns. Typical heavy metals in surface soils (0-20 cm) in Xihu Scenic Area was investigated using the grid sampling method and statistical analysis and Arcgis approaches. It was suggested that there were anthropogenic accumulations of Cu, Zn and Pb in soils, and they were the main heavy metal pollutants in Xihu Scenic Area. The contents of Cu, Zn, Pb in soils are in the ranges of 4.6-197 mg·kg-1, 11.1-885 mg·kg-1 and 11.7-346 mg·kg-1, respectively. The area with the highest 25% of Cu, Pb and Zn content located in the north-east part of the scenic area, which had lower ratios of green land, dense traffic roads and was characterized with high urbanization. Results of multiple comparison among different land uses and spatial cluster and outlier analysis revealed that those three main heavy metal pollutants Cu, Pb and Zn in Xihu Scenic Area were from traffic emissions. The purpose of this study was to provide basic data and theoretical bases for the ecological risk assessment of heavy metals in urban soils and environmental management of urban soils.

An K.,Qufu Normal University | Xie X.-P.,Qufu Normal University | Zhang H.-Z.,Hangzhou Park and Cultural Relic Administration | Zhou H.,Hangzhou Park and Cultural Relic Administration
Chinese Journal of Ecology | Year: 2015

Soil fertility comprehensively reflects soil properties and is the most sensitive dynamic indicator for integrated soil conditions. The spatial pattern of soil fertility may be impacted by different factors at different spatial scales. The spatial pattern and its impacting factors of soil fertility in West Lake Scenic Area were studied by grid sampling and the modified Nemerow formula was applied to quantitatively calculate soil fertility. The results showed that acidic soils (pH<6.5) dominated in West Lake Scenic Area. The average contents of soil organic matter and available P were at the 1st level of the soil nutrient classification standard in the second national general survey of China, while the average soil total N reached the 2nd level. Spatially, the integrated soil fertility in the north and south parts of West Lake Scenic Area was higher than in the northwest and southwest parts. Land use types, vegetation types and ecosystem types had significant effects on the spatial distribution of soil fertility. The soil integrated fertility index ranked in terms of land use types, vegetation types and ecosystem types, respectively as follows: residential area > traffic area > agricultural land > scenic greening space > mountain forest land, Quercus serrata var. brevipetiolata > Osmanthus fragrans > Cinnamomum camphora > Camellia sinensis > Phyllostachys edulis > Cyclobalanopsis glauca > Staphylea forrestii > Schima superba, and lawn > evergreen broad-leaved forest > evergreen mixed forest. As a whole, greening landscape had higher soil fertility than agricultural soil and natural soil. © 2015, Editorial Board of Chinese Journal of Ecology. All rights reserved.

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