不同香型烟区农业地质背景特征比较研究

通过对我国浓香型典型产区河南襄城、安徽宣城、湖南桂阳和江华4个产区县、37个地点以及清香型典型产区云南江川和南涧、福建永定和泰宁4个产区县、34个地点的野外实地调查, 结合1:50万地质图, 从地质年代、成土母岩等方面, 比较研究了不同香型烟区的农业地质背景特征状况。结果表明:(1)浓香型和清香型的地质年代类型跨度均较大, 前者覆盖了新生代、中生代和古生代中的5个纪、9个世;后者覆盖了新生代、中生代、古生代、新元古代和中元古代中的10个纪、12个世。(2)不同香型烟区的成土母岩类型差异较明显, 浓香型烟区以碳酸盐岩类沉积岩和黄土状沉积物2种碳酸钙含量较高的成土母岩为主, 而清香型烟区的成土母岩以碎屑类沉积岩为主。综合来看, 地质年代特征不是主导烟叶香型分异的因素, 而成土母岩对烟叶香型风格的形成影响较大。

Comparative Study on Agro-geological Background Characteristics of Different Aroma Type Tobacco Region

Based on the field investigation of full-bodied type typical county (Xiangcheng, Xuancheng, Guiyang, Jianghua), about four counties and thirty seven sites, as well as clean aroma type county (Jiangchuan, Najian, Yongding, Taining), about four counties and thirty four sites, combining 1:500 000 geological map, the agro-geological background (geological time and parent rocks) of different aroma tobacco region were studied. The results showed that (1) the geological time span of full-bodied type and clean aroma type tobacco region was both large, the former covered Cenozoic Era, Mesozoic Era and Palaeozoic Era, including five periods, nine epochs, the latter covered Cenozoic Era, Mesozoic Era, Palaeozoic Era, Neoproterozoic Era and Mesoproterozoic Era, including ten periods, twelve epochs. (2)The differences between parent rocks of different aroma tobacco region were obvious. The Full-bodied type tobacco region mainly were composed of carbonate sedimentary rocks and loess, both of them had high content of calcium carbonates. The clean aroma type tobacco region were mainly composed of clastic rocks. Conclusively, geological time characteristic is not a major factor of leading tobacco flavor differentiation, parent rocks have obvious influence on the formation of tobacco scent types.