烟叶成熟度对烤烟K326品种上部叶烟叶烘烤的影响

[目的]研究烟叶田间成熟度对K326上部叶烘烤的影响。[方法]将K326上部叶成熟度划分为3个层次，尚熟、适熟、充分成熟，分别对3种成熟度采收烟叶的烘烤产量、质量、成本、收益进行分析。[结果]试验表明，K326上部叶适熟采收烘烤效果最好，产量、质量、收益均高于尚熟采收和充分成熟采收的烟叶，建议K326采收标准为叶面变黄面积约70％～80％，色差小，叶表面有少数黄斑，没有泡状突起，主脉约3／4～4／5变白，支脉约3／4变白，叶面有成熟疯。[结论]研究可为提高K326上部叶烘烤质量提供理论和现实依据。

Effects of Maturity of Flue-cured Tobacco on Curing of K326 Upper Leaves

[ Abstract ] To study effects of tobacco maturity on curing of K326 upper leaves. [ Method ] The maturity of flue-cured tobacco K326 upper leaves were divided into three grades ： less maturity, proper maturity, over maturity. The curing yield, quality, cost and benefit of harvested tobacco leaves were analyzed. [ Result] The results showed that when upper leaves picked up at proper maturity grade, in contrast to the other two grades, the best quality and the most yield, the most income as well, was achieved. It was suggested that flue-cured tobacco K326 upper leaves should be picked up when they develop in proper maturity, that is 70% - 80% of a tobacco upper leaf is yellow with maturity spot, color difference between surface and backface is little, some yellow spot dots on the leaf without vesicle salience, 3/4 - 4/5 of main vein is white while 3/4 of branch vein is white. [ Conclusion] The study can provide theory and practice reference for improving curing quality of K326 upper leaves.