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

作　　者：李珊[1] 李启权[1] 张浩[1] 王昌全[1] 谢云波[2] 李冰[1] 蒋欣烨 LI Shan LI Qlquan ZHANG Hao WANG Changquan XIE Yunbo LI Bing JIANG Xinye(College of Resources, Sichuan Agricultural University, Chengdu Province, Luzhou, Sichuan 611130, China Luzhou Tobacco Company of Sichuan 646000, China)

机构地区：[1]四川农业大学资源学院,成都611130 [2]四川省烟草公司泸州市公司,四川泸州646000

出　　处：《土壤》2016年第6期1215-1222,共8页Soils

基　　金：四川省教育厅科研项目(16ZB0048);中国烟草总公司四川省公司科技项目(SCYC201402006)资助

摘　　要：基于泸州180份植烟土壤样品6种微量元素有效态含量数据,采用地统计方法分析了其空间变异特征,并利用相关分析探讨了其与土壤肥力因子和地形因子之间的关系,旨在为泸州烤烟生态适宜区规划和微肥施用提供参考依据。结果表明,研究区土壤有效Fe、Mn、Cu、Zn、B及Mo平均含量分别为70.42、46.72、2.33、1.75、0.34和0.17 mg/kg,总体呈现出南高北低、东高西低的空间分布格局。有效B和Mo符合球状模型,其余元素均符合指数模型;6个元素块金值与基台值之比在25%~75%之间,具有中等强度的空间相关性,其空间变异受结构性因素和随机性因素共同影响。相关性分析表明,土壤有效态微量元素与全钾之间无相关性,与有机质、氮素、磷素及速效钾总体呈正相关;坡度和坡向与土壤有效态微量元素含量之间无相关性,海拔与有效Mn、Cu及Mo呈显著或极显著的正相关关系。肥力因子对研究区土壤有效态微量元素含量空间变异的影响强于地形因子。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 mieroelement 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 

分 类 号：S151.9[农业科学—土壤学]