[Objective] This study aimed to investigate the variation dynamics of total nitrogen and nicotine of burtey tobacco at various growing stages under different ni- trogen nutrition levels to provide reference for optimi...[Objective] This study aimed to investigate the variation dynamics of total nitrogen and nicotine of burtey tobacco at various growing stages under different ni- trogen nutrition levels to provide reference for optimizing fertilization technologies for burley tobacco. [Method] Fresh burley tobacco leaves were collected at various growing stages and dried to measure the content of total nitrogen, protein and nico- tine by using INTEGRAL automated chemical analyzer and analyze the correlation with nitrogen application level. [Result] Regardless of the nitrogen application level, the content of total nitrogen and protein showed a downward trend since root ex- tending stage and reached the minimum at mature stage; the content of nicotine showed an upward trend since early vigorous growing stage and increased to the maximum at mature stage; the content of total nitrogen, protein and nicotine all in- creased after air curing; the content of total nitrogen, protein and nicotine showed positive correlation with nitrogen application level, while total nitrogen/nicotine was negatively correlated. The results indicate that nitrogen level is closely related to the total nitrogen and nicotine of burley tobacco at growing period and post-air curing, rational application of nitrogen is an important measure to regulate the content of total nitrogen and nicotine of tobacco. [Conclusion] This study provides scientific ba- sis for rational fertilization of burley tobacco.展开更多
ObjectiveThis study aimed to investigate the effects of burley and Chinese cabbage intercropping on disease occurrence and soil fertility in order to further determine the optimal burley and Chinese cabbage intercropp...ObjectiveThis study aimed to investigate the effects of burley and Chinese cabbage intercropping on disease occurrence and soil fertility in order to further determine the optimal burley and Chinese cabbage intercropping cultivation mode. MethodsEffects of burley and Chinese cabbage intercropping on disease occurrence, burley agronomic traits, yield and output value, and soil nutrients were investigated. ResultsThe results showed that for Chinese cabbage, viral diseases was severer, but the soft rot was lighter in the field with burley and Chinese cabbage intercropping compared to that with monocropping, and for burley, the viral disease was severer in the field with burley and Chinese cabbage intercropping compared to that with monocropping, with no significant difference; under the burley and Chinese cabbage intercropping mode, nitrogen input had no effect on burley agronomic traits and no significant effect on the yield and output value, and there was minor change in tobacco chemical components; burley and Chinese cabbage intercropping had no or little influence on soil pH, and and no effect on rapidly available potassium content in soil, but there is descending tend in organic matter, nitrogen and available phosphorus content. ConclusionThe study provides data support for the determination of the optimal burley tobacco and cabbage intercropping mode and the coordination of the development of these two industries.展开更多
基金Supported by Scientific and Research Project of Yunnan Tobacco Monopoly Bureau(Company)(07A06)~~
文摘[Objective] This study aimed to investigate the variation dynamics of total nitrogen and nicotine of burtey tobacco at various growing stages under different ni- trogen nutrition levels to provide reference for optimizing fertilization technologies for burley tobacco. [Method] Fresh burley tobacco leaves were collected at various growing stages and dried to measure the content of total nitrogen, protein and nico- tine by using INTEGRAL automated chemical analyzer and analyze the correlation with nitrogen application level. [Result] Regardless of the nitrogen application level, the content of total nitrogen and protein showed a downward trend since root ex- tending stage and reached the minimum at mature stage; the content of nicotine showed an upward trend since early vigorous growing stage and increased to the maximum at mature stage; the content of total nitrogen, protein and nicotine all in- creased after air curing; the content of total nitrogen, protein and nicotine showed positive correlation with nitrogen application level, while total nitrogen/nicotine was negatively correlated. The results indicate that nitrogen level is closely related to the total nitrogen and nicotine of burley tobacco at growing period and post-air curing, rational application of nitrogen is an important measure to regulate the content of total nitrogen and nicotine of tobacco. [Conclusion] This study provides scientific ba- sis for rational fertilization of burley tobacco.
基金Supported by the Burley Brand Development Fund of Yichang City(201103)~~
文摘ObjectiveThis study aimed to investigate the effects of burley and Chinese cabbage intercropping on disease occurrence and soil fertility in order to further determine the optimal burley and Chinese cabbage intercropping cultivation mode. MethodsEffects of burley and Chinese cabbage intercropping on disease occurrence, burley agronomic traits, yield and output value, and soil nutrients were investigated. ResultsThe results showed that for Chinese cabbage, viral diseases was severer, but the soft rot was lighter in the field with burley and Chinese cabbage intercropping compared to that with monocropping, and for burley, the viral disease was severer in the field with burley and Chinese cabbage intercropping compared to that with monocropping, with no significant difference; under the burley and Chinese cabbage intercropping mode, nitrogen input had no effect on burley agronomic traits and no significant effect on the yield and output value, and there was minor change in tobacco chemical components; burley and Chinese cabbage intercropping had no or little influence on soil pH, and and no effect on rapidly available potassium content in soil, but there is descending tend in organic matter, nitrogen and available phosphorus content. ConclusionThe study provides data support for the determination of the optimal burley tobacco and cabbage intercropping mode and the coordination of the development of these two industries.
