摘要
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。
Soil under three vegetation types- pure forest of Quercus acutissima, mixed forest of Pinus massoniana and Quercus acutissima, and shrub- of typical yellow brown areas in Nanjing Purple Mountain were collected by stratified sampling(0 ~ 20 cm, 20 ~ 40 cm, 40 ~ 60 cm, 60 ~ 80 cm, and 80 ~ 100 cm). Soil physical properties were determined by traditional methods, spatial variability of some soil physical properties and their relationships with the infiltration law. The results showed that, soil infiltration rates decreased by degrees from the surface to the bottom in the vertical direction under all these types of vegetation. Soil initial infiltration rates and soil silt contents, soil capillary porosities, and soil total porosities were significantly correlated; besides that, soil steady infiltration rates were significantly correlated with soil non-capillary porosities. Meanwhile, the infiltration rates of soil under pure forest of Quercus acutissima were the maximum among all these three vegetation types, combined with the comprehensive analysis of soil water holding capacity under these three vegetation types; therefore, the Quercus acutissima pure forests were inferred to provide the most ideal soil hydrological effects in the study area, and could provide a scientific basis for vegetation structure collocations of the plantation in those surrounding areas.
出处
《土壤通报》
CAS
CSCD
北大核心
2014年第2期345-351,共7页
Chinese Journal of Soil Science
基金
"十二五"农村领域国家科技计划课题"三峡库区典型区段长防林建设及质量调控技术"(2011BAD38B0403)资助
关键词
土壤机械组成
土壤容重
土壤持水能力
土壤入渗速率
Soil mechanical composition
Soil bulk density
Soil water holding capacity
Soil infiltration rate
