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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (35): 289-292.doi: 10.11924/j.issn.1000-6850.2013-1167

所属专题： 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

衡阳紫色土丘陵坡地土地退化/恢复过程中土壤水稳性团聚体的动态变化

朱红球 谢振华 李红   

  • 收稿日期:2013-04-23 修回日期:2013-05-14 出版日期:2013-12-15 发布日期:2013-12-15

Dynamic Change of Water Stable Aggregate in Land Degradation/Restoration Process on Sloping-land with Purple Soils in Hengyang

  • Received:2013-04-23 Revised:2013-05-14 Online:2013-12-15 Published:2013-12-15

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摘要： 为了揭示衡阳紫色土丘陵坡地土地退化/恢复过程中土壤质量的演变及其与土壤侵蚀的关系，采用“时空互代法”的方法，对典型区域的土地退化/恢复过程中，土壤水稳团聚体与SOC的规律进行研究。结果表明：（1）土地退化过程中，＞0.25 mm水稳团聚体的含量减少；土地恢复过程中，＞0.25 mm水稳团聚体的含量增多；（2）SOC含量随土壤开垦/恢复年限的增加而减小/增大；（3）＞0.25 mm水稳团聚体含量与SOC的关系符合方程：y=22.321x+3.541，R2=0.932；（4）土壤团聚体平均质量直径与退耕年限符合方程：y=1.984e-0.126x，R2=0.875，与＞0.25 mm水稳团聚体含量符合方程：y=0.098x+0.123，R2=0.981。

关键词: 分子鉴别, 分子鉴别

Abstract: The study is to study the changes of soil quality and the relationship with soil erosion during degradation/restoration in sloping-land with purple soils in Hengyang. By the method of spatiotemporal substitution, dynamics of soil water stable aggregation and soil organic carbon (SOC) in land degradation/restoration process in typical area was studied. The results showed that: (1) the number of ＞0.25 mm water stable aggregation tended to decrease in the process of soil degradation, while during restoration, the number of ＞0.25 mm water stable aggregation tended to increase; (2) SOC was decreasing/increasing in the process of land degradation/restoration; (3) The relationship between ＞0.25 mm water stable aggregation and SOC match the equality: y=22.321x+3.541 (R2=0.932); (4) The relationship between mean weight diameter (MWD) of soil water stable aggregate with restoration years and ＞0.25 mm water stable aggregation matched the equality: y=1.984e-0.126x (R2=0.875) and y=0.098x+0.123 (R2=0.981) respectively.