摘要： 为明确贵州省铜仁烟区土壤中量元素状况,科学补充烟田中量元素,平衡烟株营养,进一步改善烟叶质量,对铜仁4个主要植烟县区90个植烟土壤样本交换性钙、镁及有效硫含量进行了测定,并分析其分布状况。结果表明:铜仁主要烟区植烟土壤植烟土壤平均交换性钙含量8.65 cmol/kg,思南土壤交换性钙最高,德江最低,有10.00%的土壤缺钙。交换性镁平均为2.34 cmol/kg,有18.89%的土壤缺镁,特别是思南。土壤交换性钙镁比平均为8.85,分别有41.11%和26.67%的土壤存在生理性缺钙和缺镁的风险。有效硫含量较丰富,平均为33.52 mg/kg,约15.56%的土壤存在缺硫或潜在缺硫。为此,烤烟生产上要针对不同烟区的土壤中量元素状况,建议在烟草专用肥施用的基础上,因地制宜的增施钙镁硫肥。

关键词: 铜仁, 烤烟, 中量元素, 评价

Abstract: In order to investigate medium elements in tobacco growing soils of Tongren and supply micronutrients to tobacco fields to improve the production and quality of tobacco,the microelement nutrients in 90 soil samples collected from 4 tobacco growing counties in Tongren were analyzed,and their distribution was evaluated.The results showed that the average content of exchangeable calcium was 8.65 cmol/kg,and was the highest and lowest in Sinan and Dejiang,respectively.10.00% of the soils samples were deficient in calcium.The average content of exchangeable magnesium was 2.34 cmol/kg,and 18.89% of the soils samples were deficient in magnesium.The average ratio of soil exchangeable calcium content to soil exchangeable magnesium content was 8.85,41.11% and 26.67% of the soils were physiologic deficient in calcium and magnesium.The available sulfur conten t in soil was rich with the mean of 33.52 mg/kg.Among the soil samples collected,15.56% of them were considered as lack or potentially lack of sulfur.It is suggested to use calcium,magnesium and sulfur fertilizerrs according to the local soil medium element status based on the special fertilizer for flue-cured tobacco.

Key words: Tongren, Flue-cured tobacco, Medium element, Evaluation

中图分类号: 

• S158

• S572