烟草科技2017，Vol.50Issue(10)：8-15,8.
盐源县植烟土壤交换性钙镁空间变异特征及其影响因素
Spatial variability and influencing factors of exchangeable calcium and magnesium in Yanyuan tobacco-growing soil
摘要
Abstract
To investigate the secondary elements in Yanyuan tobacco-growing soil, the spatial variability and influencing factors of exchangeable calcium (Ca) and magnesium (Mg) were analyzed by geostatistics combined with GIS. The results showed that the average contents of exchangeable Ca and Mg were 2 507.14 and 210.66 mg/kg, respectively. Exchangeable Ca and Mg were rich in general. In spatial structure, the nugget coefficient of exchangeable Ca was 24.398%, which presented a strong spatial correlation and was mainly affected by structural factors. The nugget coefficient of exchangeable Mg was 37.293%, which presented a moderate spatial correlation and was influenced by both structural factors and random factors. Viewing from the spatial distribution angle, the exchangeable Ca content increased from east to west direction, and exchangeable Mg content increased from north to south direction. Soil particle size distribution had the greatest impact on exchangeable Ca, which explained 27.7% of spatial variability of the exchangeable Ca content, and followed by soil type, organic matter content and preceding crop. Preceding crop had the greatest impact on exchangeable Mg, which explained 15.2% of the spatial variability of exchangeable Mg content, and followed by soil particle size distribution and organic matter content.关键词
盐源县/植烟土壤/交换性钙/交换性镁/空间变异/影响因素Key words
Yanyuan County/Tobacco-growing soil/Exchangeable calcium/Exchangeable magnesium/Spatial variability/Influencing factor分类
农业科技引用本文复制引用
王冰,冯浪,李启权,王勇,陈玉蓝,罗琳,王昌全,杨娟..盐源县植烟土壤交换性钙镁空间变异特征及其影响因素[J].烟草科技,2017,50(10):8-15,8.基金项目
中国烟草总公司四川省公司重点项目"基于3S技术的四川烟区生态环境要素时空特征提取及应用"(SCYC201402006). （SCYC201402006）
