【摘要】 [目的]研究云烟85在速效氮含量不同的田块的纯氮用量。[方法]将供试品种云烟85分别种植在速效氮不同的地块。采用单因素随机区组设计,对生育期、农艺性状、经济性状、烟叶化学成分进行观察测定。[结果]适量施用氮肥,促进烟株生长发育,改善烟株农艺和经济性状;过量施用氮肥,导致烟叶烟碱含量降低,还原糖含量降低,糖碱比失调。[结论]在速效氮含量高的土壤上,施用纯氮97.5～127.5 kg/hm2,烟叶总量和产值趋于稳定,当纯氮用量达到157.5 kg/hm2时,烟叶产值降低。在速效氮含量低的土壤上施用纯氮127.5 kg/hm2,烟叶增产效果明显。更多还原

【Abstract】 [Objective] The aim was to study the pure nitrogen consumption in different nitrogen content field on flue-cured tobacco 85.[Method] Drain 85 varieties tested respectively grown in available nitrogen different plot.Test of the single factor randomized was designed,the growth period,and agronomic characters and economic characters,tobacco leaf chemical constituents were observed.[Result] Through reasonable of nitrogen fertilizer,the growth and development of tobacco plant were promoted and agricultural and economic characters were improved,excessive amounts of nitrogen fertilizer,led to reduce the nicotine content in tobacco leaves and sugar content in phloem,ratio of sugar and nicotin disordered.[Conclusion] In the available nitrogen content of soils with high,pure nitrogen 97.5-127.5 kg/hm2 improved the quality and total output value of the tobacco plant,when pure nitrogen content reached 157.5 km/hm2,tobacco production value reduced.In available nitrogen content of the soils with low,127.5 kg/hm2 pure nitrogen,tobacco economic benefit increased.更多还原