Analysis of factors controlling soil phosphorus loss with surface runoff in Huihe National Nature Reserve by principal component and path analysis methods

Phosphorus (P) loss with surface runoff accounts for the P input to and acceleration of eutrophication of the freshwater. Many studies have focused on factors affecting P loss with surface runoff from soils, but rarely on the relationship among these factors. In the present study, rainfall simulatio...

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Bibliographic Details
Published in:Environmental science and pollution research international 2018, Vol.25 (3), p.2320-2330
Main Authors: He, Jing, Su, Derong, Lv, Shihai, Diao, Zhaoyan, Bu, He, Wo, Qiang
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Chemical properties
Earth and Environmental Science
Ecotoxicology
Electrical conductivity
Electrical resistivity
Environment
Environmental Chemistry
Environmental Health
Environmental science
Eutrophication
Grasslands
Moisture content
Organic carbon
Organic chemistry
Organic phosphorus
Organic soils
pH effects
Phosphorus
Principal components analysis
Rainfall
Regression analysis
Research Article
Runoff
Soil analysis
Soil chemistry
Soil conditions
Soil conductivity
Soil erosion
Soil pH
Soil properties
Soil water
Surface runoff
Waste Water Technology
Water content
Water Management
Water Pollution Control
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Summary:Phosphorus (P) loss with surface runoff accounts for the P input to and acceleration of eutrophication of the freshwater. Many studies have focused on factors affecting P loss with surface runoff from soils, but rarely on the relationship among these factors. In the present study, rainfall simulation on P loss with surface runoff was conducted in Huihe National Nature Reserve, in Hulunbeier grassland, China, and the relationships between P loss with surface runoff, soil properties, and rainfall conditions were examined. Principal component analysis and path analysis were used to analyze the direct and indirect effects on P loss with surface runoff. The results showed that P loss with surface runoff was closely correlated with soil electrical conductivity, soil pH, soil Olsen P, soil total nitrogen (TN), soil total phosphorus (TP), and soil organic carbon (SOC). The main driving factors which influenced P loss with surface runoff were soil TN, soil pH, soil Olsen P, and soil water content. Path analysis and determination coefficient analysis indicated that the standard multiple regression equation for P loss with surface runoff and each main factor was Y  = 7.429 – 0.439 soil TN − 6.834 soil pH + 1.721 soil Olsen-P + 0.183 soil water content ( r  = 0.487, p  
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-017-0570-5