摘要
通过对贵州喀斯特生态脆弱区土壤的调查研究,结果表明,成土母质、海拔高度和利用方式对土壤的理化性质有较大影响,其中影响最大的是土地利用方式,即林地、灌木丛地、荒草地等自然植被下的土壤理化性状较好,养分含量高,而经开垦耕作后,土壤理化性质变化较大,土层变浅,腐殖质层变薄,颗粒变细,水稳性困粒减少,土壤易于流失,有机质及养分含量明显减少,pH值升高,土壤贫瘠化,土壤总体质量表现出明显的退化。
This paper studies the soil quality deterioration in Guizhou Karst region.The results showed that parent material,altitude and cultivation affected the soil's physics and chemistry characters.Among them,the tillage was the most important factor.The soil's physics and chemistry characters under the vegetation,such as the stand,bushes and wasteland were better,and the nutrition was higher.After cultivation,the soil layer and the humus horizon became thin,the particle of soil changed small.Then the soil was eroded easily.The organic and nutrient components were decreased,and the value of pH was rising.The soil's quality was deteriorated obviously.
出处
《山地农业生物学报》
2004年第3期230-233,共4页
Journal of Mountain Agriculture and Biology
