苏北低山丘陵区森林次生演替过程中土壤养分的空间变异  

Spatial Variability of Soil Nutrition during the Process of Secondary Forest Succession in Low Mountainous and Hilly Area of Northern Jiangsu

作　　者：于法展[1] 齐芳燕[1] 单勇兵[1] 李淑芬[1] 

机构地区：[1]徐州师范大学城市与环境学院,江苏徐州221116

出　　处：《地域研究与开发》2009年第4期115-119,共5页Areal Research and Development

基　　金：国家自然科学基金资助项目(40671053);江苏省高校自然科学研究计划项目(05KJB420133);徐州师范大学科研基金重点项目(08XLA10)

摘　　要：为了探明苏北低山丘陵区森林次生演替过程中土壤养分状况以及空间变化规律,对该地区森林土壤养分特征以及空间变化进行系统研究。结果表明,该区森林演替过程中土壤养分在演替方向上表现出较强的规律,土壤有机质、全氮、碱解氮和速效钾随着植被从低级向高级演进逐渐积累,同时,土壤养分的空间变化趋势是与植物群落的演替进程相适应的,随着大量凋落物在表层聚集,土壤有机质积累,全氮、碱解氮、有效钾也有所提高,土壤肥力呈明显上升趋势。In order to find out the status of soil nutrition and spatial variability rule during the process of forest secondary succession in low mountainous and hilly area of northern Jiangsu, a systematic research has been done on the character of soil nutrition and spatial change in this area. The result shows that soil nutrition has a pretty obvious rule on the change direction during the process of secondary forest succession in this area. With the vegetation changing from lower level to higher level, the organic matter, total nitrogen, available nitrogen and available K gradually accumulate. At the same time the spatial variability trend of soil nutrition matches with the succession process of plant community. After a large amount of litter accumulate on the surface, the organic matter begins to accumulate, and total nitrogen, available nitrogen and available K also increase, which leads to obvious upward trend for soil fertility.

关 键 词：土壤养分 空间变异 森林次生演替 苏北低山丘陵区 

分 类 号：S714.925.3[农业科学—林学]