罗平烟区不同类型植烟土壤速效钾与烟叶钾关系分析

Relationship Between Soil and Tobacco Potassium Content in Different Types of Tobacco Growing Areas in High Altitude Tobacco Growing Areas

研究了罗平烟区不同类型植烟土壤速效钾和烟叶钾的分布情况,以及土壤速效钾与烟叶钾之间的相互关系,为当地平衡施用钾肥提供理论依据和技术参考。测定了罗平烟区636份烤烟样品和213份土壤样品,分析了它们之间的关系。结果表明,罗平植烟土壤速效钾含量适宜,平均为(262.60±8.36)mg·kg^(-1),变幅为66.19~618.49 mg·kg^(-1),变异系数较小,为3.18%,适宜样本为25.0%;不同类型土壤间速效钾含量差异较大,最高的是新积土,为301.02 mg·kg^(-1),最低的是紫色土,为186.50 mg·kg^(-1),;罗平烟区烟叶钾含量平均为2.11%±0.50%,变幅为0.35%~3.88%,变异系数为23.7%,变异程度较小;不同土壤类型之间,以黄壤烟叶钾含量为最高,为2.20%;紫色土次之,为2.11%;红壤最低,为1.99%。相关分析表明,烟叶中钾含量随着土壤速效钾含量的增加而增加,但是增长趋势随着土壤速效钾含量增加而逐渐放缓。

This study focus on the distribution of available potassium and tobacco potassium in different types of tobacco planting soil in Luoping, and the relationship between soil and tobacco leaf, to provide theoretical basis and technical reference for balanced appli- cation of potassium fertilizer. 636 flue-cured tobacco samples and 213 soil samples in Luoping were determination, the relationship between them was analyzed. Results showed thatLuoping plant available potassium in tobacco soil was suitable, the average was （262.60＋8.36） mg. kg-1, ranged from 66.19 rag＂ kg-~ to 618.49 mg＂ kg-I, and a small coefficient of variation was 3.18%, suitable for a sample of 25.0%; the difference between different types of soil available potassium content was larger, the highest was the new soil （301.02 rag. kg-~）, the lowest was purple soil （186.5 mg. kg-l）; Luoping tobacco potassium content was 2.11%_＋0.50%, ranged from 0.35% to 3.88%, the variation coefficient was 23.7%, the variation degree was low. Between different soil types, the tobacco leaf potassium content in yellow soil was the highest （2.20%）,than the purple soil （2.11%） ,and the red soil was the lowest （1.99%）. The correlation analysis showed that the content of potassium in tobacco leaf increased with the soil available potassium content, but the content of potassium in tobacco leaf increased gradually with the increase of soil available potassium content.