自然资源学报 ›› 2018, Vol. 33 ›› Issue (1): 149-160.doi: 10.11849/zrzyxb.20161265

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南方红壤区不同侵蚀程度下土壤有机质空间变异的影响因素研究

江叶枫a, 孙凯a, 郭熙a, *, 叶英聪b, 饶磊a, 李伟峰a, 李婕a, 王澜珂a   

  1. 江西农业大学 a. 江西省鄱阳湖流域农业资源与生态重点实验室/国土资源与环境学院,b. 林学院,南昌 330045
  • 收稿日期:2016-11-18 修回日期:2017-03-31 出版日期:2018-01-20 发布日期:2018-01-20
  • 通讯作者: 郭熙(1974- ),男,副教授,博士后,主要从事土壤遥感与信息技术及土地资源利用方面研究。E-mail: xig435@163.com
  • 作者简介:江叶枫(1994- ),男,江西余干人,硕士研究生,主要从事土壤侵蚀与土壤养分变异研究。E-mail: jiangyf0308@163.com
  • 基金资助:

    国家自然科学基金项目(41361049); 江西省自然科学基金项目(20122BAB204012); 江西省赣鄱英才“555”领军人才项目(201295)

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.

摘要:

研究不同侵蚀程度下土壤有机质空间变异的影响因素对指导耕地利用和水土保持工作的开展具有重要意义。论文以江西省兴国县耕地土壤有机质为研究对象,分析了不同侵蚀程度下土壤有机质的空间变异及其影响因素。结果表明:随着侵蚀程度的加深,兴国县土壤有机质含量呈下降趋势。不同侵蚀程度下土壤有机质含量差异显著(P<0.001),等级均为四级。变异系数由大到小依次为中度侵蚀(43.70%)>剧烈侵蚀(37.78%)>重度侵蚀(34.88%)>极强度侵蚀(34.44%)>无明显侵蚀(34.38%)>轻微侵蚀(28.91%)。在无明显侵蚀和轻微侵蚀时,高程和剖面构型是影响土壤有机质空间变异的主要因子。在中度侵蚀和重度侵蚀时,主要影响因素变为坡度。但在极强度侵蚀和剧烈侵蚀时,高程、坡度、坡向、成土母质和剖面构型对土壤有机质含量都影响显著(P<0.05)。因此,不同侵蚀程度下土壤有机质空间变异影响因素不尽相同。在不同侵蚀程度下合理开展耕地利用和水土保持工作有利于最大限度地节约资源。

关键词: 不同侵蚀程度, 红壤丘陵区, 土壤有机质

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

中图分类号: 

  • S157