摘要
对山西某自燃煤矸石山人工林地50 m×50 m样地土壤(0~100 cm层)水分进行测定。应用地统计学方法对煤矸石山人工重建植被区0~100 cm的各层土壤水分的空间异质性进行研究。结果表明:1)7月0~30 cm层土壤平均含水量的变异系数小于4月0~30 cm层变异系数,土壤表层水分变异系数高于其它各层,4月表层(0~10 cm)的变异系数为66%,7月为41%,均大于10%,达到中等变异程度;2)半方差函数分析结果表明,各层土壤水分均具有空间异质性,4月各层土壤水分结构比范围81%~99.9%,系统结构比>75%,系统具有强烈的空间相关性,而7月除40~50 cm层具有强烈空间自相关性,结构比为83%,其余各层结构比范围50%~59%,属中等程度的相关性。4月和7月50 m×50 m的网格取样的土壤水分变异函数变程,不同取样时间所得的变程差距较大。4月各层变程范围为4.5~54.4 m,7月各层变程范围为32.8~146.6 m;3)土壤水分插值图反映出,表层与近矸石层的土壤含水量斑块形状的复杂性程度较大,中间层反之。
The moisture of spontaneous combustion gangue pile soil sampling plots sized 50 m ×50 m from 0 to 100 cm in depth in an Artificial vegetation in Yangquan of Shanxi Proviance were measured. The spatial heterogeneity of soil moisture of each layer from 0 to 100 cm in the artificial vegetation were studied using geo-statistics. The results showed that, 1）The coefficient of variation of the average water content of soil at 0 ~30 cm layer in July is smaller than that in April, The coefficient of variation of the surface soil moisture was bigger than others,the variation coefficient of 0~10 cm layer is 66% in April and 41% in July. They are moderate variation as is all bigger than 10%. 2） Semi-variance analysis showed that, soil moisture in different layers all has spatial heterogeneity. The range of structural ratio of each layer is from 81% to 99.9% in April, structural ratio is bigger than 75%, the System has a strong spatial correlation, so does in July except for the layers from 40 to 50 cm, and its structural ratio is 83%. The remaining layers have medium correlation their ratio range is from 50%to 59%. From the scale of semivariogram of the soil moisture of 50 m × 50 m grid soil sampling in April and July, there is a relatively large disparity in scale in different sampling time. The scale range of each layer in April and July are（4.5 ~ 54.4m） and（32.8 ~ 146.6 m） respectively. 3） Kriging interpolation of soil moisture indicates that the complexity of plaque in Surface and near spontaneous combustion gangue piles layer was greater, while the rest layers are not.
作者
王丽艳
郭东明
刘光正
吕立纯
Wang Liyan Guo Dongming Liu Guangzheng Lu Lichun(, Jiangxi Academy of Forestry, Nanehang Jiangxi 330013, China Xinfeng Forestry Bureau, Xinfeng Jiangxi 341600, China)
出处
《南方林业科学》
2017年第3期5-12,共8页
South China Forestry Science
关键词
自燃煤矸石山
土壤水分
空间异质性
spontaneous combustion gangue piles
soil moisture
spatial heterogeneity
作者简介
王丽艳，女，副研究员，博士，主要从事生态恢复研究。E—mail：wangliyan052@163．com
