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为优化烟叶结构、探索高海拔烟区适度密植条件下的施氮和留叶技术,采用云烟87品种,在四川盐源烟区(海拔2 350 m)进行了施氮量与留叶数调控对烤烟等级结构、部位结构、产量和品质影响的田间试验。结果表明:试验的9个处理组合中,施纯氮90.0 kg/hm2、单株留叶16片的处理组合,中部叶比例最高,上等烟比例和上中等烟比例较高;烟叶均价最高,产量适中,产值较高;中部叶感官品质最好,上部叶感官品质较好;烟叶外观品质和化学成分协调性较好。综合考虑烟叶等级和部位结构、经济性状、化学成分、外观及感官品质,在盐源高海拔烟区中等肥力土壤上,种植密度20 800株/hm2时,以施用纯氮90.0 kg/hm2、单株留叶16片为宜。
In order to optimize the structure of tobacco leaf and to explore the techniques of nitrogen application and leaf leave retention in moderately dense planting areas at high altitude, Yunfu 87 was used to control the amount of nitrogen application and leaves retention in Yanyuan tobacco-growing area of Sichuan (2350 m above sea level) Flue - cured tobacco hierarchy, site structure, yield and quality of field trials. The results showed that among the nine treatment combinations, the treatment with 90.0 kg / hm2 of pure nitrogen and 16 leaves per plant had the highest proportion of middle leaves, the higher proportion of superior tobacco and the higher proportion of middle-grade tobacco, and the highest average price of tobacco leaves , Moderate yield and high output value. The sensory quality of the middle leaves was the best, the sensory quality of the upper leaves was better, and the appearance quality and chemical composition of tobacco leaves were better. Considering the tobacco leaf rank and site structure, economic traits, chemical composition, appearance and sensory quality, when the density of 20 800 plants / hm2 was planted on moderately fertile soil with salt source high altitude tobacco crop, single nitrogen 90.0 kg / hm2 Strain leaves 16 is appropriate.