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

发布时间：2018-06-17 11:19

本文选题：微量元素 + 植烟土壤　；参考：《土壤》2016年06期

【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。
[Abstract]:Based on the available contents of six trace elements in 180 samples of tobacco planting soil in Luzhou, the spatial variation characteristics were analyzed by means of geostatistics, and the relationship between them and soil fertility factors and topographic factors were discussed by correlation analysis. The purpose of this study was to provide reference for planning and application of micro-fertilizer in ecological suitable area of Luzhou flue-cured tobacco. The results showed that the average contents of available Fe ~ (2 +) mn ~ (2 +) Cu ~ (2 +) Zn ~ (2 +) B and Mo in soil in the study area were 70.42 ~ 46.72 ~ (2) C ~ (-1) C ~ (-1) and 0.17 mg 路kg ~ (-1) 路kg ~ (-1), respectively, showing a spatial distribution pattern of high and low in south and north and low in east and west respectively. The effective B and Mo accord with the spherical model, the other elements all accord with the exponential model, the ratio of 6 element block gold value to the base value is between 25% and 75%, and the spatial variation of the effective B and Mo is medium intensity spatial correlation, its spatial variation is influenced by both structural factors and random factors. The correlation analysis showed that there was no correlation between soil available trace elements and total potassium, but there was a positive correlation between soil available trace elements and organic matter, nitrogen, phosphorus and available potassium, while there was no correlation between slope degree and slope direction and soil available trace element content. There was a significant or extremely significant positive correlation between elevation and available mn Cu and Mo. The effect of fertility factors on the spatial variation of soil available trace elements was stronger than that on topographic factors.
【作者单位】：四川农业大学资源学院;四川省烟草公司泸州市公司;
【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
【分类号】：S153.6;S572

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