不同叶位整形模式对白肋烟生长及烟叶多酚物质含量的影响

Effect of Different Leaf Pruning Patterns on Growth and Leaf Polyphenol Content in White Burley

叶位整形是一项促进烟叶生长和品质提高的栽培管理措施,为明确不同叶位整形模式对白肋烟生长及多酚物质含量的影响,我们在白肋烟主产区—湖北省恩施州研究了不同叶位整形模式下不同生育期白肋烟的叶面积、叶绿素含量(CCI值)、各器官生物量和上下位叶片中多酚物质含量。结果表明:叶位整形显著影响了白肋烟生长和烟叶多酚物质含量,不但增大了不同叶位烟叶的叶面积及CCI值,还协调了各器官生物量、营养物质的合理分配以及不同叶位烟叶中多酚物质的含量;但不同叶位整形模式对白肋烟的生长影响不同,即旺长期整形(WZ)处理对白肋烟整株的促进作用较好,而团棵后期整形(TH)处理仅对上位叶效果较好。本研究采用的叶位整形栽培管理技术在保证白肋烟产量的同时,可在一定程度上促进白肋烟生长及烟叶品质的提高。

Leaf pruning is a new practical technology for improving tobacco growth and leaf quality. To study the impacts of different leaf pruning patterns on growth and leaf polyphenol content in white burley, field experiments were carried out in Enshi Prefecture of Hubei Province. The leaf area, chlorophyll content index （CCI）, biomass of each organ, and superior and inferior leaf polyphenol content were investigated. Results showed that leaf pruning significantly influenced the growth and leaf polyphenol content in white hurley. Field leaf pruning increased the leaf area and CCI value at different leaf positions, and regulated and improved the translocation of organ biomass and nutrient substances, as well as the distribution of polyphenols in different leaf positions. At the same time, the response of different leaf pruning patterns was varied. Leaf pruning at the fast-growing stage （WZ） improved leaf quality for the whole tobacco plant, while leaf pruning at the later rosette stage （TH） only improved leaf quality for the upward leaves. In conclusion, based on traditional cultural and production conditions, leaf pruning could improve white burley growth and leaf quality.