黑钙土烤烟氮素积累、分配的研究

The N Accumulation and Distribution and Quality in Flue-cured Tobacco in Chernozem

通过对黑钙土上烤烟氮素积累与分配研究,结果表明,从烟株全生育期内氮素含量与积累结果可看出,不施氮肥处理,烤烟氮积累总量为96.97 kghm-2,黑钙土土壤供氮能力强;施氮处理N1（52.5 kghm-2）和N2（67.5 kghm-2）氮积累总量分别为117.94和121.59 kghm-2,烟株氮积累量同施氮量成正比,各部位烟叶氮素含量范围适中,从不同部位烟叶氮积累表明,N1和N2处理上部叶氮积累量分别为42.93 kghm-2和43.90 kghm-2,下部叶、茎花氮积累量相差不大,增加氮肥用量,烟株氮素主要集中在上部烟叶。从烤烟经济效益角度考虑,黑钙土上施氮量应控制在52.5~67.5 kghm-2之间比较适宜。

Nitrogen accumulation and distribution were studied in flue-cured tobacco in chernozem.The results showed that tobacco nitrogen accumulation in the treatment N0,N1 and N2 were 96.97,117.94 and 121.59 kg hm-2.From different parts of tobacco leaves showed that the upper leaf nitrogen accumulation of the treatments N1 and N2 were 42.93 kg hm-2 and 43.90 kg hm-2,the lower leaf and flower stems were the same or less increase in the amount of nitrogen fertilizer.Nitrogen mainly concentrated in the upper leaves with the amount of nitrogen application.From an economic point of view,the amounts of nitrogen fertilizer should control between 52.5 and 67.5 kg hm-2 in chernozem.