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当前位置: 首页 > 文章 > 喀斯特地区碳酸盐岩发育土壤团聚体稳定性研究 农业现代化研究 2010,31 (4) 114-118
Position: Home > Articles > Soil Aggregate Stability Derived from Different Carbonate Parent Materials in Karst Area Research of Agricultural Modernization 2010,31 (4) 114-118

喀斯特地区碳酸盐岩发育土壤团聚体稳定性研究

作  者：
罗明;周运超
单  位：
贵州大学林学院
关键词：
碳酸盐;团聚体稳定性;团聚体组成;Le Bissonnais法
摘  要：
土壤团聚体的数量及稳定性是衡量土壤抗蚀性和土壤质量的重要标志,本文应用Yoder湿筛法和Le Bissonnais法研究喀斯特地区3种主要母质发育的土壤团聚体稳定性和物理机制。结果表明:湿筛法测定的团聚体稳定性表现为:石灰岩>白云岩>灰质白云岩;Le Bissonnais法测定的团聚体稳定性表现为慢速(SW)>机械(WS)>快速(FW),通过相对糊化指数(RSI)和相对机械破坏指数(RMI)两个指标进一步说明喀斯特地区碳酸盐岩发育土壤团聚体崩解的主要机制是团聚体中封闭空气引起的消散作用;对不同粒径的团聚体研究得出:5-2mm及2-1mm团聚体稳定性表现为:石灰岩>灰质白云岩>白云岩,而1-0.5mm及0.5-0.25mm团聚体稳定性则表现为:石灰岩>白云岩>灰质白云岩。
译  名：
Soil Aggregate Stability Derived from Different Carbonate Parent Materials in Karst Area
作  者：
LUO Ming,ZHOU Yun-chao (College of Forestry,Guizhou University,Guiyang,Guizhou 550025,China)
关键词：
carbonate;aggregate stability;aggregate size distribution;Le Bissonnais method
摘  要：
The measurement of aggregate stability is often used as indices of charactering soil anti-erodibility and soil quality.This article used Yoder's wet-sieving and Le Bissonnais method to assess aggregate stability and its breakdown mechanisms of three soils derived from carbonate rocks in Karst area.The results of the study indicated that: the aggregate stability indices as determinded by Yoder's wet-sieving,changed in the following order Limestone>Dolomite>Limy dolomite.The measurement of aggregate stability by Le Bissonnais method was SW>WS>FW,which suggested that the mechanisms of aggregate breakdown of carbonate soil were mainly caused by the entrapped air pressure in the soil porosity and clay different swelling when fast wetting get by RSI and RMI indices further explain.The aggregate stability of 5-2 mm and 2-1 mm was Limestone>Gray dolomite>Dolomite,but it was different for 1-0.5 mm and 0.5-0.25 mm: Limestone>Dolomite>Gray dolomite.

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