摘要
采取野外调查与室内分析相结合方法对丘陵紫色土区林地、撂荒地、水田、旱地土壤剖面（0-40cm）理化性质进行了研究，结果表明，不同土地利用方式对土壤剖面理化性质影响很大。有机质、全氮、碱解氮、全磷、有效磷、有效钾含量和孔隙度均随土层深度增加而减小，而土壤体积质量表现出相反趋势，全钾则受土层深度影响较小。水田、林地有机质、全氮、碱解氮含量均明显高于撂荒地、旱地，但林地有机质、全氮、碱解氮含量仅在表层（0-10cm）高于水田，而撂荒地相比于旱地虽然有提高有机质、全氮、碱解氮含量的作用，但也仅限于土壤表层。旱地全磷含量显著高于水田、撂荒地和林地全磷含量，有效磷、全钾、有效钾含量则以水田最大，而撂荒地、林地全磷、有效磷、全钾和有效钾含量均小于旱地和水田，特别是林地表现出极小值。土壤体积质量表现出林地〉旱地〉撂荒地〉水田规律，而孔隙度则表现出相反规律。
Soil physico-chemical properties under woodland, wasteland, cropland and dryland in purple hill- y areas were studied by means of field survey and laboratory analysis. The results showed a significant influence of land-use patterns on soil properties. Soil organic matter, total N, alkali-hydrolyzable N, total P, available P, available K and porosity tended to decrease with increasing soil depth; on the contrary, bulk density showed an opposite trend, but total K was little affected by soil depth. Soil organic matter, total N and alkali-hydrolyzable N in cropland and woodland were significantly higher than in wasteland and dryland, and the difference between woodland and cropland and between wasteland and dryland in their or-ganic matter, total N and alkali-hydrolyzable N was limited to the surface layer of the soil （0-10cm）. Total P in dryland was significantly higher than that in woodland, wasteland and cropland, and available P, total K and available K was the highest in cropland. On the contrary, total P, available P, total K and a-Vailable K in wasteland and woodland were lower, and the minimum was found in woodland. Woodland had the greatest bulk density, followed in sequence by dryland, wasteland and cropland, and pol：osity showed an opposite trend to bulk density.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第3期101-106,共6页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科委自然科学基金“稻田保护性耕作对有机碳截存作用机理研究”资助项目(9066)
