论文部分内容阅读
对南京市紫金山典型黄棕壤区麻栎纯林、麻栎马尾松混交林及灌木三种植被结构下土壤进行环刀法分层(0~20 cm、20~40 cm、40~60 cm、60~80 cm、80~100 cm)取样,采用传统土壤物理性质测定方法,研究了林分尺度下部分土壤物理性质的空间变异性及其与渗透规律的相互关系。结果表明:三种植被林下土壤在垂直方向上入渗速率由表及里均逐步递减,土壤初渗速率与土壤粉粒含量、土壤毛管孔隙度及土壤总孔隙度极显著相关,而土壤稳渗速率与土壤非毛管孔隙度极显著相关。同时,麻栎纯林的土壤渗透速率在三种植被类型中为最大;结合各植被结构下土壤持水能力分析,故而推断研究区麻栎纯林的土壤水文效应最为理想,可为该地区的人工造林植被结构搭配提供科学依据。
The soil under three vegetation types (0-20 cm, 20-40 cm, 40-60 cm) was planted in the pure brown oak forest of Quercus mongolica and mixed forest of Pinus massoniana Lamb. , 60 ~ 80 cm, 80 ~ 100 cm). The spatial variability of some soil physical properties at subsurface stand scale and its relationship with infiltration law were studied using traditional methods of soil physical properties determination. The results showed that the vertical infiltration rate of soils under three kinds of vegetation decreased gradually from the surface to the surface, and the initial infiltration rate of soil was significantly correlated with the content of soil silt, the capillary porosity of soil and the total porosity of soil, Penetration rate was significantly correlated with soil non-capillary porosity. At the same time, the soil infiltration rate of Pure Oak plantation was the largest among the three vegetation types. Combining the analysis of soil water holding capacity under each vegetation structure, it was concluded that the soil hydrological effect of Pure Oak plantation in the study area was the best, Artificial afforestation vegetation structure to provide a scientific basis.