土壤2016，Vol.48Issue(6)：1215-1222,8.DOI:10.13758/j.cnki.tr.2016.06.022
泸州植烟土壤有效态微量元素含量空间变异及其影响因素
Spatial Variability of Soil Available Microelement Contents and Their Influencing Factors in Luzhou’s Tobacco Planting Area, Southwestern Sichuan
摘要
Abstract
Based on the 180 soil samples collected from Luzhou’s tobacco planting area, the spatial variability characteristics of soil available microelement contents (available Fe, Mn, Cu, Zn, B and Mo) as well as their influencing fators for instance fertility factors and topgraphic factors with correlation for ecological suitability zone planning of tobacco and microelement fertilizer apply were analyzed using by geostatistics and GIS technology. The results showed that the average contents of soil available Fe, Mn, Cu, Zn, B and Mo were 70.42, 46.72, 2.33, 1.75, 0.34 and 0.17 mg/kg, respectively, showing the spatial distribution pattern with high contents in south and east regions while low contents in north and west regions on the whole. Semi-variance analysis revealed available B and Mo fit for the spherical model while the other elements for the exponential model. The ratios of nugget to sill were between 25% and 75%, indicating the spatial varibilities of the six soil available microelements were affected by both the structural and random factors. For fertility factors, soil available microelement contents had no significant correlation with total potassium, but positively correlated with soil organic matter, nitrogen, phosphorus and available potassium and negatively correlated with pH on the whole. For topgraphic fators, slope and aspect had no significant correlation with soil available microelement contents while altitude had significant or extremely significant correlations with available Mn, Cu and Mo. In comparison, soil fertility factors played a more important role on the spatial variabilities of soil available microelement contents in the study area.关键词
微量元素/植烟土壤/空间变异/影响因素/泸州Key words
Microelement/Tobacco planting soil/Spatial variability/Influencing factors/Luzhou分类
农业科技引用本文复制引用
李珊,李启权,张浩,王昌全,谢云波,李冰,蒋欣烨..泸州植烟土壤有效态微量元素含量空间变异及其影响因素[J].土壤,2016,48(6):1215-1222,8.基金项目
四川省教育厅科研项目(16ZB0048)和中国烟草总公司四川省公司科技项目(SCYC201402006)资助。 （16ZB0048）
