【作者】 李进平； 谢志坚； 涂书新； 许汝冰； 陈振国； 王学龙； 曹仕明； 李建平； 于洋； 张允政；

【Author】 LI Jin-ping;XIE Zhi-jian;TU Shu-xin;XU Ru-bing;CHEN Zhen-guo;WANG Xue-long;CAO Shi-ming;LI Jian-ping;YU Yang;ZHANG Yun-zheng;Tobacco Science Institute of Hubei Province;College of Resource and Environment,Huazhong Agricultural University;Institute of Soil & Fertilizer and Environment,Jiangxi Academy of Agricultural Sciences;Xiangfan Tobacco Company;

【机构】 湖北省烟草科研所； 华中农业大学资源与环境学院； 江西省农业科学院土壤肥料与资源环境研究所； 襄樊市烟草公司；

【摘要】 采用田间试验与¹⁵N同位素示踪微区试验,在湖北襄樊植烟生态区老湾村（N 31°27′,E 111°14′,海拔1130m）研究了3个不同移栽期和施用氮肥对烤烟烟碱含量和烟碱氮素来源的影响。研究结果表明,与5月5日移栽相比,推迟移栽期至5月15日²5日,烟碱含量、烟碱氮占总氮比例以及烟碱肥料氮比例分别平均增加10%⁸5%、5%¹10%和21%⁵6%;与不施氮相比,施用氮肥提高烟碱含量12%⁵9%,提高烟碱氮占总氮比例5%¹27%。烤烟烟碱氮占总氮的比例随生育进程逐渐增加,而各部位烟叶烟碱肥料氮比例随生育进程和叶位上升逐渐下降。土壤氮是烟碱氮的主要来源,对烟叶烟碱含量有决定性影响。结果说明在当地条件下,控施氮肥和适当提前移栽期更有利于降低烟叶（尤其是中、上部叶）中的烟碱含量。更多还原

【Abstract】 In order to investigate the effects of transplanting date（5th May,15 th M ay,25 th May） of flue-cured tobacco（FCT） seedlings and nitrogen fertilization on nicotine synthesis and sources of nicotine N of FCT,a field experiment with¹⁵N isotope tracing micio-plots was carried out in Laowan（N 31°27’,E 111°14’,1130 m above sea level）,a main tobacco production area of Xiangfan city,Hubei province.The results showed that,compared with the transplanting date of5 th May,pstponing the transplanting date to 15th-25 th May increased the nicotine concentrations,the proportion of nicotine N to total N,and the proportion of nicotine fertilizer N in organs of FCT plants by 10%-85%,5%-110%,and 21%-56%,respectively.Applying N fertilizer significantly increased the nicotine concentration and the proportion of nicotine N to total N by 12%-59%and 5%-127%,respectively.The proportion of nicotine N to total N in differ ent parts of FCT plants increased with growing of the plants,and the proportion of nicotine fertilizer N decreased with the growing of FCT plants and the rising of leaf position.Soil N was the main source of nicotine N.These results suggested that decreasing of N supplication and early transplanting make for reducing of nicotine concentrations in FCT leaves,especially in the middle and upper leaves.更多还原