Abstract:

Through controlling the (field) soil water content in fast growing period of mid-later phase, the effect of soil water content on burley tobacco’s nicotine conversion was investigated. The results showed that slight drought of soil (60% soil moisture) in fast growing period led to high converter’s nicotine conversion difference between drought and normal water supply treatments among the air-curing period, which was lower than high converter’s nicotine conversion of normal water supply all the time. Non-converter’ of different soil water supply treatment had similar percent of nicotine conversion (PNC), and they were all in low level. The slight drought treatment (60% soil moisture treatment) in fast growing period was benefit to decrease high converter’s nornicotine content and PNC, meanwhile, also could increase non-converter’s stability in nicotine conversion character at a certain extent.