...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 ..
The exchangeablecalcium content and distribution in different land-form areas were also analyzed.
分析了不同地貌类型区土壤交换性钙含量及分布规律。
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According to chemical composition, exchangeable cation and thermal behaviors of crystal structure, Xuancheng zeolite should belong to calcium-rich clinoptilolite with low thermal stability.