Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (1): 241-251.doi: 10.13278/j.cnki.jjuese.20170049

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Spatial Variability of Soil Nitrate Nitrogen and Its Influencing Factors

Zhang Yuling, Si Chaoqun, Chen Zhiyu, Chu Wenlei, Chen Zaixing, Wang Huang   

  1. College of Environment and Resources/Institute of Water Resources and Environment, Jilin University, Changchun 130021, China
  • Received:2017-02-07 Online:2018-01-26 Published:2018-01-26
  • Supported by:
    Supported by Major Projects of Special Funds for Environmental Protection and Public Welfare Research(201009009)

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Abstract: In order to understand the spatial variability of nitrate nitrogen in soil and provide a basis for control and remediation of nitrate contaminated soil, taking one typical agricultural irrigation area in Northeast China as an example, we analyzed the spatial variability characteristics and influencing factors of nitrate nitrogen in soil by geo-statistical methods. The results show that the spatial variation of soil nitrate nitrogen is significant, and the coefficient of variation is above 82.88%. There is strict autocorrelation of soil nitrate in the north-south direction of the first layer soil,the structural component of spatial variation is high. The spatial variation of nitrate in the second and third layers of soil is in a similar way as a fractal Brown movement, and the nitrate content of the fourth layer of soil is changed randomly in all directions. The total content of soil nitrate nitrogen decreases from the west to the east, and the content of soil nitrate were both high in the lower reaches of Hunhe River and near the Xihe River. The effects of different factors on the spatial variation of nitrate nitrogen are different. The content of nitrate in soil is consistent with the spatial distribution of organic matter content. The soil nitrate nitrogen in paddy field decreases linearly with depth,while the content of nitrate nitrogen in other types of soil has a rebounce after a downward decline, which is associated with the soil environmental characteristics with surface loam and sandy soil rich in nitrate.

Key words: nitrate pollution, geo-statistical methods, spatial variation, influencing factor

CLC Number: 

  • X53
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