JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (1): 149-160.doi: 10.11849/zrzyxb.20161265

Previous Articles     Next Articles

Spatial Variability of Organic Matter and Its Influencing Factors in Red Soil with Different Erosion Degrees in South China

JIANG Ye-fenga, SUN Kaia, GUO Xia, YE Ying-congb, RAO Leia, LI Wei-fenga, LI Jiea, WANG Lan-kea   

  1. a. Key laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province / Academy of Land Resource and Environment, b. College of forestry, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2016-11-18 Revised:2017-03-31 Online:2018-01-20 Published:2018-01-20
  • Supported by:

    National Natural Science Foundation of China, No. 41361049; Natural Science Foundation of Jiangxi Province, No. 20122BAB204012; GanPo “555” Talent Research Funds of Jiangxi Province, No. 201295.

Abstract:

SPSS and GIS were applied to analyze the spatial variability of soil organic matter (SOM) and its influencing factors in red soil with different erosion degrees in Xingguo County in Jiangxi Province. The results showed that the SOM content tends to decline with the increase of soil erosion degree. Significant differences of SOM content were found in soil with different erosion degrees (P<0.001), and the soil of each erosion degree can be divided into four grades of SOM content, with the coefficient of variation decreasing in the order of moderate erosion (43.70%), fierce erosion (37.78%), serious erosion (34.88%), extremely intensive erosion (34.44%), no significant erosion (34.38%) and slight erosion (28.91%). In the cases of no significant erosion and slight erosion, the elevation and profile pattern are the main controlling factors affecting spatial variability of SOM. When the erosion is moderate or serious, slope becomes the main factor. The elevation, profile configuration, slope and parent material all have significant effects on the SOM content in soil with extremely intensive erosion or fierce erosion. The research indicated that there are various controlling factors in soil with different erosion degrees. It can maximize saving resources when reasonably using of cultivated land, soil and water according to the erosion level of soil. The study is of great significance for cultivated land use and soil and water conservation.

Key words: erosion degree, hilly region of red soil, soil organic matter

CLC Number: 

  • S157