摘要
对贵州省中部喀斯特地区4种典型成土母岩(灰质白云岩,石灰岩,长石石英砂岩,白云岩)发育的土壤的抗蚀抗冲性进行研究。结果表明:可将衡量土壤抗蚀性的12个指标压缩为3个最佳指标。抗蚀性指标主成分分析综合指数表明,4种岩性土壤抗蚀性为:灰质白云岩(43.42)>石灰岩(5.49)>白云岩(2.72)>长石石英砂岩(-34.49);15°、20°、30°3个坡度下的抗冲性显著不同,随着坡度的增加,4种岩性土壤抗冲性显著差异也逐渐增加;4种岩性土壤抗冲性变化规律与抗蚀性吻合,土壤抗冲性强弱与抗蚀性强弱趋于一致。土壤的抗蚀性与抗冲性与成土母岩的性质关系密切。
Anti-erodibility and anti-scourability of 4 typical soil-forming rocks （calcific dolomite stone, limestone, feldspathic quartzose gritstone and dolomite stone） in Karst area in central Guizhou were studied. Principal component analysis （PCA） was used in the soil anti -erodibility indexes. Experiments of soil scourability were conducted with different gradients under water dipping and scouring. The result showed that the 12 anti-erodibility indexes could be scaled down to the 3 optimal indexes. PCA comprehensive exponent of anti-erodibility indexes showed the order of anti-erodibility, which were calcific dolomite stone （43.42） 〉 limestone （5.49） 〉 dolomite stone （2.72） 〉 feldspathic quartzose gritstone （-34.49）. Soil anti-scourability was distinct in each gradient between 15°, 20°and 30°. The distinctness increased by the augment of gradient. Change of soil anti-scourability was in agreement with soil anti-erodibility. There was close relationship between the characters of soil-forming rocks and the soil anti-erodibility and anti-scourability.
出处
《安徽农业科学》
CAS
北大核心
2007年第29期9311-9313,9317,共4页
Journal of Anhui Agricultural Sciences
基金
贵州省省长基金(2004)
贵州省科学研究基金"喀斯特人工林下土壤生态学属性与土壤环境评价"([2006]2034号)
关键词
喀斯特
岩性
土壤
土壤抗蚀性
土壤抗冲性
Karst
Lithologic
Soil, Soil anti-erodibility
Soil anti-scourability
