Grants and Contracts Details


Experiments have demonstrated that the curing conditions optimal for high quality leaf are also those that favor TSNA accumulation, but the specific effect of the three factors involved in the curing process, temperature, relative humidity and airflow, have not been well defined. Previous studies have correlated TSNA levels with the ambient environmental conditions in commercial barns on farms, with or without various configurations of fans and vents, or in smaller experimental structures covered with plastic. This approach is severely limited by the confounding of the three environmental components. We can better understand the role of environmental factors on TSNA accumulation during curing, and so gain knowledge of the most important factor to control during commercial curing, by using a ore controlled environment. Twenty four curing chambers in which temperature and humidity can be manipulated independently of each other were constructed. Thirty tobacco plants can be accommodated in each chamber at various combinations of temperature and relative humidity. TSNAs in the cured leaf from each environment will be analyzed and the quality of the leaf will be assessed. The first two years of data (data from the third year is not yet available) have shown that humidity has more effect on TSNAs than does temperature, although conversion at the end of curing was the same in all environments. The 2015 test will investigate the effect of airflow as well as temperature and humidity on TSNA accumulation.
Effective start/end date2/1/156/30/16


  • Council for Burley Tobacco: $5,000.00


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