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通过对湖南主要烟区3520个土壤样品中K、Mg含量测定的结果表明,湖南省主要烟区植烟土壤的全K、速效K、交换性Mg的含量平均分别为13.7gkg-1、127.3mgkg-1、1.16cmolkg-1;不同烟区其含量差异较大,绝大多数土壤存在着不同程度的缺K、缺Mg状况。田间试验表明,钾、镁肥合理配施(K20360kghm-2、MgS04.7H20300kghm-2)能促进烟草生长,增加烟叶产量、产值,提高烟叶品质,促进烟叶对K、Mg养分的吸收。
The results of determination of K and Mg in 3520 soil samples of main tobacco growing areas in Hunan Province showed that the contents of total K, available K, and exchangeable Mg in the main tobacco growing areas in Hunan Province were 13.7gkg-1 and 127.3mgkg respectively -1,1.16cmolkg-1; the content of different areas of tobacco is quite different, the vast majority of soil there are varying degrees of lack of K, lack of Mg status. Field experiments showed that K20360kghm-2, MgS04.7H20300kghm-2 could promote the growth of tobacco, increase the output and output of tobacco, improve the quality of tobacco and promote the absorption of K and Mg in tobacco.