不同经营类型红松林下土壤腐殖质的空间异质性

运用野外调查与室内实验分析相结合的方法,利用SPSS 13.0软件和ArcGis 9.3软件对原始红松林、白桦红松混交林Ⅰ(红松天然更新)、白桦红松混交林Ⅱ(红松人工造林)和红松人工纯林4种经营类型红松林下土壤腐殖质进行经典的统计描述和地统计学的空间异质性分析。结果表明:经营类型不同导致土壤腐殖质含量的差异,白桦红松混交林下土壤腐殖质含量高于红松人工纯林。不同经营方式红松林下土壤腐殖质的空间异质性特征显著不同,4种经营类型红松林下土壤腐殖质空间异质性多受随机因素的影响,但2种白桦红松混交林下土壤腐殖质空间异质性的空间自相关部分大于红松人工纯林,而且2种白桦红松混交林下土壤腐殖质空间异质性的尺度也较红松人工纯林下土壤腐殖质空间异质性的尺度大。2种白桦红松混交林林下土壤腐殖质空间分布格局要明显优于红松人工纯林下的土壤腐殖质空间分布格局。研究结果可为红松林的恢复与持续经营提供理论基础。

Spatial Heterogeneity of Soil Humus Under Different Management Type of Pinus koraiensis Forests

Through the manner of field investigation and room experiments,by using software of SPSS 13.0 and ArcGis 9.3,geostatistical analysis tool,the spatial heterogeneity of the soil humus under virgin Pinus koraiensis forest,Betula platyphylla and Pinus koraiensis mixed forestⅠ(Pinus koraiensis natural regeneration),Betula platyphylla and Pinus koraiensis mixed forestⅡ(Pinus koraiensis planted) and pure Pinus koraiensis plantation were studied.The soil humus content under different forest was different,the soil humus content under Betula platyphylla and Pinus koraiensis mixed forest was higher than that under pure Pinus koraiensis plantation.The characteristics of the spatial heterogeneity of the soil humus under different forest types were different,the spatial heterogeneity of the soil humus under four forest types were influenced by random factors,but the auto relationship part of the soil humus spatial heterogeneity and the scale of the soil humus spatial heterogeneity under Betula platyphylla and Pinus koraiensis mixed forests were bigger than that under pure Pinus koraiensis plantation.The spatial distribution pattern of the soil humus under Betula platyphylla and Pinus koraiensis mixed forests was superior to that under pure Pinus koraiensis plantation.The results would provide a theory basis for the recovery and the sustainable management of the Pinus koraiensis forest.