Spatial variability and affecting factors of soil nutrients in croplands of Northeast China: a case study in Dehui County

Z.M. Wang, K.S. Song, B. Zhang, D.W. Liu, X.Y. Li, C.Y. Ren, S.M. Zhang, L. Luo and C.H. Zhang
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Z.M. Wang: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
K.S. Song: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
B. Zhang: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
D.W. Liu: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
X.Y. Li: School of Earth Sciences, Jilin University, Changchun, Jilin Province, P.R. China
C.Y. Ren: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
S.M. Zhang: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
L. Luo: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China
C.H. Zhang: Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin Province, P.R. China

Plant, Soil and Environment, 2009, vol. 55, issue 3, 110-120

Abstract: This paper addressed the spatial distribution characteristics of organic matter, total nitrogen, extractable phosphorus and extractable potassium in agricultural soils of Northeast China. The related factors were explored using geostatistics and geographic information systems. The results showed that the log-transformed data of the four soil nutrients followed a normal distribution. Soil extractable phosphorus had a higher coefficient of variation. The experimental variogram of the log-transformed data of soil organic matter, total nitrogen and extractable phosphorus was fitted with an exponential model, while soil extractable potassium was fitted to a spherical model. Soil samples from smaller slope gradients had higher organic matter and total nitrogen. Soil type affected the four soil nutrients significantly. Soil samples from dry farming land had significantly higher total nitrogen and extractable potassium than soil from paddy fields, while the contrary was found for extractable phosphorus. Along the Yinma River, soil samples from the western part have statistically higher values for organic matter, total nitrogen and extractable potassium than those collected from the eastern part.

Keywords: soil nutrients; landscape attributes; geostatistics; GIS; Dehui County; Northeast China (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:55:y:2009:i:3:id:323-pse

DOI: 10.17221/323-PSE

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