›› 2018, Vol. 30 ›› Issue (6): 1035-1043.DOI: 10.3969/j.issn.1004-1524.2018.06.21

• Environmental Science • Previous Articles     Next Articles

Spatial characteristics and influencing factors of soil nutrients in hilly region of South China

ZHAO Yue1, 2, LUO Zhijun1, 2, *, ZHAO Jie1, 2, JIANG Chunyan1, 2, Cao Liping1, 2   

  1. 1. School of Environment and Land Resource Management, Jiangxi Agricultural University, Nanchang 330045, China;
    2. Jiangxi Provincial Key Laboratory of Agricultural Resources and Ecology in Poyang Lake Basin, Nanchang 330045, China
  • Received:2017-09-18 Online:2018-06-20 Published:2018-07-02

Abstract: The spatial characteristics of soil nutrients and their correlation with influencing factors were studied in hilly areas of southern China, to provide references for the efficient utilization of land resources and soil nutrient conservation. In the present study, Xiajiang County, Jiangxi Province was selected as the research object, soil samples were collected, and soil organic matter, available phosphorus, available potassium and alkali hydrolysable nitrogen contents were measured, and factors on soil nutrients were examined via spatial variability analysis and spatial autocorrelation analysis to explore the main influencing factors. It was shown that the distribution of soil nutrients in Xiajiang County was in accordance with the normal distribution, and the content of alkali hydrolyzable nitrogen was abundant. The contents of organic matter and available potassium were in the middle level, yet the available phosphorus content was low. The organic matter, available phosphorus showed moderate variation, yet available potassium showed strong spatial variability, alkaline hydrolyzable nitrogen showed weak spatial variability. Generally speaking, soil nutrients in the cultivated land in the west of the study area were generally lower than that in the east, and were higher in the area with higher elevation, or lower gradient, slope variability and topographic relief. Besides, soil nutrients were higher in the area with sandy rock weathering materials soil parent material, and were lower in the area with acid crystalline rock weathering substance as soil parent material.

Key words: farmland, soil fertility, spatial variability, hilly land

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