...文网 关键词 植烟土壤；交换性钙；交换性镁；钙镁比；黔南州 [gap=1652]Key words tobacco-growing soil；exchangeable calcium；exchangeable magnesium；Ca/Mg；the south of Guizhou Province ..
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分析了不同地貌类型区土壤交换性钙含量及分布规律。
The exchangeable calcium content and distribution in different land-form areas were also analyzed.
交换性钙与速效硼呈低—高—低—高的波浪式变化趋势；
The content level of base exchange capacity and effective boron had a waving trend of low high low high.
钙是以交换性盐基在粘土矿物及土壤的有机部分出现的。
It occurs as an exchangeable base in the clay mineral and organic fractions of soils.
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