地理研究 ›› 1992, Vol. 11 ›› Issue (4): 75-85.doi: 10.11821/yj1992040009

• 研究报告 • 上一篇    下一篇

华南赤红壤坡地退化特征及其整治开发——以“五华县国土试验区”为例

谢明, 何江华, 林美莹, 邹国础   

  1. 广东省土壤研究所
  • 出版日期:1992-12-15 发布日期:1992-12-15

DEGRADED SLOPE ON LATERITIC RED EARTH:ITS PROPERTIES, MANAGEMENT AND DEVELOPMENT IN SOUTH CHINA——WITH AN EXAMPLE OF WUHUA COUNTY

Xie Ming, He Jianghua, Lin Meiying, Zou Guochu   

  1. Institute of Soil Science, Guangdong Province
  • Online:1992-12-15 Published:1992-12-15

摘要: 华南赤红壤坡地退化具有以下特扯:1)土壤发生层次遭到剥蚀,2)土壤质地砂化,3)土壤化学性质衰退。本文介绍广东省五华县坡地立体开发,防治其继续退化以及整治严重退化坡地的试验情况,为华南的坡地利用提供了值得借鉴的经验。

关键词: 水土流失, 坡地退化, 坡地整治, 立体开发, 华南

Abstract: According to the samples from Wuhua County,Guangdong province,degraded slope on lateritic red earth in South China has the following properties.1.Pedogenic horizons are denuded.Litter horizon(A0) has disappeared; organic horizon(A)is non-clear,replaced by the transitional horizon of (AB),even (A) horizon is fully eroded,illuvial horizon (B) is revealed on the ground.2.Soil becomes sandy.Slope on arenaceous shale sandifies slightly,soil texture is still nainly "non-stony heavy loam" (> 3 mm stony content is less than 0.5%,<0.01mm physical clay 45-60%),slope on weathered granite sandifies seriously,soil texture has generally degraded to "heavy-stony medium loam" (stony> 10%,physical clay 30-45%).3.Soil chemical characteristic deteriorates.In our view,slope on lateri-tic red earth in South China starts to degrade once the content of soil organic matter falls below 3%.Soil and water loss from inappropriate land use system including farming,on steep slope,plowing up and down hills,monouculture farming,and over felling forests is the major cause of degraded slope in mountains of South China.The degraded slope in Wuhua County has been managed and developed according to different degraded degrees.