种植密度与移栽期对烤烟生长发育和品质的影响

为了探索适合广东南雄烟区合理的烤烟种植方式，采用田间裂区试验，设置2种种植密度为主处理，3个移栽期为副处理，研究种植密度和移栽期对烤烟生育期、株型、产量及其构成、烟叶化学成分与感官质量的影响。结果表明：（1）随着移栽期的推迟，烟株生长发育相应延迟，且烟株旺长期、采烤期趋于缩短；种植密度则对烟株生育进程无明显影响。（2）提前或推迟移栽使烟株早花率和杈烟率增加；种植密度对烟株的早花率及杈烟率无显著影响。（3）提前移栽时，高密度种植烤烟产量显著高于低密度种植，而正常或推迟移栽时，种植密度对烟叶产量无显著影响；提前或推迟移栽，同时降低种植密度，可导致中部叶香气量的下降，而提前移栽可降低上部叶感官质量，推迟移栽则提升上部叶的感官质量。因此，通过不同种植密度与移栽期合理配置，能够有效调控烟草的生长发育并对烟叶的产量构成和品质产生重要的影响。

The Effects of Planting Density and Transplanting Time on the Growth and Quality of Flue-cured Tobacco

To study the effects of planting density and transplanting time on the growth and quality of flue-cured tobacco,a field experiment was conducted by a split plot design,including two planting density as main treatment and three transplanting as vice treatment,to investigate the effects of planting density and transplanting time on the growth period and type of flue-cured tobacco plants,and analyze the relationship planting density and transplanting time and yield and its components,leaf chemical composition,sensory quality.The results showed that：（1） with the postponement of the transplanting period,the development of the tobacco was stunting,and the growth peak period and baked period tended to shorten.Planting density had no significant effect on the processes of development on tobacco plant.（2） The rate of early flowers and branch tobaccos in tobaccos increased when transplanting time was early or late,and were no significantly affected by planting density of flue-cured tobacco.（3） Ahead of transplanting,the yield of high-density planting was significantly higher than that of the low-density planting;normal or postponed transplanting,planting density had no significant effect on the yield of flue-cured tobacco;when the transplanting was in advance or postpone,planting density reduced could lead to the decline about the concentration of aroma in the central leaf.The transplanting time advanced could reduce the sensory quality in upper leaves,and the transplanting time postponed was to improve the sensory quality of the upper leaves.Therefore,the reasonable configuration of planting densities and the transplanting time played an important role to regulate the growth and development of flue-cured tobacco,as well as to build on the high yield and quality.