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通过对福建烟区 117个代表性土壤及相应的烟叶样品的分析结果表明 :福建烟区平均土壤交换性Mg含量为 31.78mg·kg-1,土壤有 80 %以上交换性Mg含量低于临界值 ,有 5 0 %以上烟叶存在不同程度的缺Mg现象 ,烟叶Mg含量大部分在0 15 %～ 0 .2 5 % 不同土壤类型交换性Mg含量顺序是 :紫泥田 >潮沙田 >黄泥田 >灰泥田 >沙质田 >乌泥田 不同品种烟叶中Mg含量不同 ,外引品种K32 6 ,G80烟叶中Mg含量高于当地品种翠碧一号和岩烟 97 通过施用 2 2 5kg hm-1MgSO4 ·7H2 O ,对烤烟增产增质效果明显
Through the analysis of 117 representative soils and their corresponding tobacco leaf samples in Fujian tobacco area, the average soil exchangeable Mg content in Fujian tobacco area was 31.78 mg · kg-1, and the content of exchangeable Mg above 80% in soil was below the critical value , There were more than 50% of tobacco leaves with different degrees of Mg deficiency phenomenon, most of the Mg content in the leaves was 0 15% ~ 0 25%. The sequence of exchangeable Mg content in different soil types was purple soil> tidal desert> yellow soil> gray soil The contents of Mg in leaves of muddy field> sandy land> black muddy field were different, and Mg content in tobacco leaves of K326 and G80 were higher than that of local cultivars CuiBi 1 and YanYan97 by applying 225kg hm-1MgSO4.7H2O , The effect of increasing yield and increasing flue-cured tobacco is obvious