城市森林土壤温度场的特征  

A Study on the Thermal Field of the Soil in Urban Forest

作　　者：吴力立[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2003年第1期21-26,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业局重点课题"江苏下蜀城市森林生态系统定位研究"(96-31)

摘　　要：以南京林业大学城市森林生态系统定位研究站3片林分和空旷地(1992.1～1998.12)的日土温观测资料为依据,采用多项土温指标研究城市森林中自地面往下20cm深处土壤温度场的特点,以各月土温的日垂直梯度分布范围及其百分率确定土壤中热流量主导流向,并从理论上计算出土温年恒温层的起始深度林中比空旷地降低2～5m。The soil temperature characteristics from soil surface to 20 cm depth are investigated using data measured daily at four climatological observations,three stands and an open field of the located station during the period of 1992～1998.This study considered the index terms in the monthly mean,annual range,monthtomonth difference,amplitude of the monthly variation etc.In addition,according to the distribution of the vertical temperature gradient of the soil in every month,which indicates the direction of the thermal current in the soil.The depth of the layer of the annual constant temperature of the soil was computed with the formula of the thermal wave of the soil,the results showed that the soil depths of the variable temperature inside the stands were deeper 2～5 m than those in the open field.

关 键 词：土壤温度场 城市森林 年变化 铅直梯度 恒温层 

分 类 号：S714.2[农业科学—林学]