阔叶红松林林隙地面温度微环境变异特征

 以小兴安岭阔叶红松林林隙为研究对象,采用地统计学方法对林隙地面温度的微环境变异特征进行分析。结果表明:1)各月份林隙平均地面温度呈单峰变化趋势,6月份林隙平均地面温度和最高温度较高,树木生长季初期和末期地面平均日温差较大,而树木生长旺季却相对较小;5月份林隙地面温度变异程度强,属于中等变异,其他月份均属于弱性变异。2)各月份林隙地面温度空间变异程度不同,且自相关部分的空间异质性在总空间异质性中占主要部分,并表现出较强变异趋势。3)各月份林隙地面温度空间分布复杂程度及斑块等级不同;地面温度高值区出现在林隙东侧和西北侧,呈不对称分布。

Micro-environmental variation feature of soil surface temperature in a broad-leaved Pinus koraiensis forest gap

Based on broad-leaved Pinus koraiensis forest gap in Xiao Xing'an Mountains,micro-environmental variation feature of soil surface temperature in the gap was studied by geographical statistics' method.Results showed that soil surface temperature demonstrated by a single peak changing tendency in the months.The mean and maximum soil surface temperature was higher at June,and mean daily range of that was higher at initial and final stage of the forest growth.The greater variation of soil surface temperature that belongs to medium variation was found in May,and these of other months were weaker.The differences of spatial heterogeneity of soil surface temperature were presented between different months.The spatial heterogeneity of autocorrelation was the main part of the total,and showed greater variation.The complexities and patch grades of distribution of soil surface temperature were different between experimental months,and higher value areas that located at east and north-west of the gap were asymmetric.