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Abstract
The concentration of total nitrogen (TN), total phosphorus (TP) and organic material (OM) at sixty grid division in Lake Chaohu basin around the lake was studied, in order to investigate their spatial distribution characteristics. The results showed that the average concentrations of TN, TP and OM were 1027 mg/kg, 483 mg/kg, 1.95%, and their concentrations ranged from 253 mg/kg to 2273 mg/kg, 223 mg/kg to 1173 mg/kg and 0.291% to 5.48%, respectively. The high concentration areas were located at the basins of Tuogao river and Zhao river while the low concentration areas were located at basins of Pai river, Nanfei river and Dianpu river. The concentrations of TN and OM were higher in East part than in West part. The spatial distribution of TN, TP and OM concentrations of the surface soil showed inconsistent with those of the water quality of the inflow rivers and the lake and the TN and TP of lake sediment studied.
Highlights
The nitrogen, phosphorus and other various nutrients were mainly stored in soil in terrestrial ecosystems
The results showed that the average concentrations of total nitrogen (TN), total phosphorus (TP) and organic material (OM) were 1027 mg/kg, 483 mg/kg, 1.95%, and their concentrations ranged from 253 mg/kg to 2273 mg/kg, 223 mg/kg to 1173 mg/kg and 0.291% to 5.48%, respectively
The high concentration areas were located at the basins of Tuogao river, Zhao river and the east of Yuxi river while the low concentration areas were located at basins of Hangpu river, Fengle river, Pai river, Nanfei river and Dianpu river
Summary
The nitrogen, phosphorus and other various nutrients were mainly stored in soil in terrestrial ecosystems. Because of the effect of unreasonable human activities for a long time, the basin of Lake Chaohu faced with severe environmental pollution and water eutrophication. It has affected the basin sustainable development of the social economy. The nitrogen (N), phosphorus (P) and organic material (OM) in the soil are the mainly effect factors of the watershed non-point source pollution. This survey of research is carried out in the Lake Chaohu surrounding area. The purpose of this research is to investigate the spatial distribution characteristics of the N, P and OM concentrations of the surface soil
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