不同留叶数对烤烟新品种NC297生长及产质量的影响

试验研究了不同留叶数对NC297农艺性状、经济性状和内在化学成分等方面的影响。结果表明，随着留叶数的增加，株高、节距呈逐渐增加趋势，茎围呈递减趋势；留叶数20～22片的株型较好；留叶数对中、下部叶片的长宽影响较小，上部叶片则是随着留叶数的增加而减小。随着留叶数的增加产量呈递增趋势，而均价、上等烟比例、中等烟比例则呈递减趋势；以留叶20～22片／株经济性状最好；留叶数22片／株的化学成分比较协调。

Effects of Apparent Leaf Number on Growth,Yields and Quality of New Flue-cured Tobacco Variety NC297

A field experiment was conducted to investigate the effects of different apparent leaf number on agronomic trait,economic character and content of chemical components of flue-cured tobacco variety NC297.The results were as follows:The plant height and the length of internodes increased while the stalk circumference decreased gradually with the increasing number of apparent leaves.There was a little effect on the length and width of cutters and lower leaves.With the increase of apparent leaf number,the length and width of upper leaves decreased.The favorable plant shape appeared when the apparent leaf number ranged 20-22 per plant.The average price,the rate of high and middle class leaf enhanced gradually while the yields decreased with the apparent leaf number.The economic characters performed better when the apparent leaf number ranged 20-22 per plant.The chemical components were harmonious when apparent leaf number was kept at 22 per plant.