不同施氮量对烤烟K326生长发育及品质的影响

摘要

This paper studied the effects of different application rates of nitrogen fertilizer on the growth duration, agronomic characters, appearance quality of tobacco leaves, economic traits and inner chemical composition of flue - cured tobacco cultivar K326 through the field experiment. The results showed that the increasing of nitrogen fertilizer application rate in the range from 97.5 kg/ Km2 to 142.5 kg/hm2 could improve the agronomic characters and economic characters of tobacco plants, enhance the appearance quality of tobacco leaves, harmonize the inner chemical composition of tobacco leaves, and increase the yield and production value per unit area. Among 4 treatments, the treatment of applying 142.5 kg/hm2 pure nitrogen obtained the best effect.%通过大田试验,研究了不同施氮量对烤烟品种K326生育期、农艺性状、烟叶外观质量、经济性状和内在化学成分的影响.结果表明:在97.5～142.5 kg/hm2范围内,增加施氮量可以改善烟株的农艺性状和经济性状,提高烟叶的外观品质,协调烟叶内在化学成分,从而提高单位面积产量和产值.在4个处理中,以施用142.5 kg/hm2纯氮的效果最佳.