不同连作时期对烤烟氮素吸收和利用的影响  

Nitrogen Uptake and Utilization of Flue-cured Tobacco in Various Continuous Cropping Years

作　　者：王鹏[1] 孟蕾[1] 张吉立[2] 关鑫 

机构地区：[1]黑龙江八一农垦大学,黑龙江大庆163319 [2]大庆职业学院,黑龙江大庆163255 [3]哈尔滨烟叶公司肇州分公司,黑龙江肇州166400

出　　处：《中国烟草科学》2012年第4期75-78,共4页Chinese Tobacco Science

基　　金：黑龙江省烟草公司资助项目(HN200814)

摘　　要：田间试验研究了连作3年和5年对烤烟氮素吸收和利用的影响。结果表明,无论在自然肥力还是常规施肥条件下,连作5年氮积累量均明显低于连作3年,并且氮素快速积累期拖后2周;连作3年烤烟根和茎氮素分配比例高于连作5年,烤烟氮肥利用率也高10.60个百分点,此说明延长连作时间严重影响烤烟氮素吸收,烤烟连作不宜超过5年。Field experiments were conducted to investigate nitrogen uptake and utilization of flue-cured tobacco with 3 and 5 continuous cropping years, so as to understand the effect of continuous planting of tobacco on nitrogen and utilization. The results showed that, with or without fertilizer application, nitrogen accumulation of flue-cured tobacco were lower in 5 year continuous planting than those of 3 years, and Nitrogen fast accumulation for 5 year continuous planting defer for 2 weeks than those of 3 years. Nitrogen use efficiency for 3 year continuous planting was 10.6% higher than those of 5 years.

关 键 词：烤烟 连作 氮吸收 氮利用 

分 类 号：S572[农业科学—烟草工业]