移栽期对南平烟区烤烟生长发育及烟叶质量的影响OA

[Objective]To explore the effects of transplanting dates on the growth,development,and leaf quality of flue-cured tobacco culti-var Cuibi 1 in the Nanping tobacco-growing region.[Method]A field experiment was conducted with three transplanting date treatments:Janu-ary 5,January 10,and January 15.The impacts of different transplanting dates on the growth period,disease index,agronomic traits,post-cu-ring appearance quality,chemical composition,and sensory quality of flue-cured tobacco were systematically analyzed.[Result]With the de-lay of transplanting date,the rosette stage was gradually shortened,agronomic traits were significantly improved,the expansion of top leaves was enhanced,and the incidence and disease index of mosaic virus disease were progressively reduced,with a tendency of improved leaf ap-pearance quality.The treatment transplanted on January 10 achieved the highest output value,the optimal proportion of top-grade tobacco,and the highest average price,with relatively low disease occurrence,but its sensory quality score was lower.The treatment transplanted on January 5 showed the best sensory quality,but had poor top leaf expansion,high disease incidence,and thus affected the output value and economic benefits.The treatment transplanted on January 15 exhibited superior agronomic traits and appearance quality,as well as better coordination of chemical components,but its output value was lower than that of the January 10 treatment.[Conclusion]Considering the growth and develop-ment,leaf quality,and economic benefits comprehensively,transplanting on January 10 is beneficial for reducing disease incidence,impro-ving appearance quality and leaf grade structure,increasing total output value,and thus has higher production and promotion value.