Excessive application of chemical fertilizer and organophosphorus pesticides induced total phosphorus loss from planting causing surface water eutrophication

Total phosphorus (TP) loss from planting was one of the resources causing agricultural non-point source pollution. It is significant to clarify the factors influencing TP loss, as well as explore the relationship between TP loss from planting and surface water eutrophication for making recommendatio...

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Bibliographic Details
Published in:Scientific reports 2021-11, Vol.11 (1), p.23015-8, Article 23015
Main Authors: Liu, Liyuan, Zheng, Xiangqun, Wei, Xiaocheng, Kai, Zhang, Xu, Yan
Format: Article
Language:English
Subjects:
704/172/169
704/172/4081
Agricultural runoff
Agrochemicals
Anthropogenic factors
Eutrophication
Fertilization
Fertilizers
Humanities and Social Sciences
Irrigation water
Leaching
multidisciplinary
Nonpoint source pollution
Organophosphorus pesticides
Pesticides
Phosphorus
Planting
Point source pollution
Relative humidity
Science
Science (multidisciplinary)
Surface runoff
Surface water
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Summary:Total phosphorus (TP) loss from planting was one of the resources causing agricultural non-point source pollution. It is significant to clarify the factors influencing TP loss, as well as explore the relationship between TP loss from planting and surface water eutrophication for making recommendations on the reduction of environmental pollution. In this study, the minimum and maximum of average TP loss was appeared in Qinghai and Shandong province with the TP loss of 7.7 × 10 2  t and 7.5 × 10 3  t from 2012 to 2014, respectively. The results of structural equation model (SEM) indicating that the effect of anthropogenic drivers on TP loss was more important than natural conditions due to the higher path coefficient of anthropogenic drivers (0.814) than that of natural conditions (0.130). For anthropogenic drivers, the path coefficients of usage of fertilizer and pesticides, which was often excessively applied in China, were 0.921 and 0.909, respectively causing they the two dominant factors affecting TP loss. Annual precipitation and relative humidity, which were belongs to natural conditions, increased TP loss by enhancing leaching and surface runoff. However, light duration could reduce TP loss by promoting crop growth and increasing TP absorption of crops, with a path coefficient of − 0.920. TP loss of each province in per unit area from planting was significantly correlated with TP concentration of its surface water ( p  
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-02521-7