中国烟草学报2018，Vol.24Issue(2)：74-83,10.DOI:10.16472/j.chinatobacco.2017.393
水肥一体化条件下烤烟氮素营养高效利用研究
Study on eff ective utilization of nitrogen nutrition in fl ue-cured tobacco production under integration of water and fertilizer
摘要
Abstract
[Objectives] Experiment was conducted to investigate high efficiency utilization of nitrogen nutrition under integrated water and fertilizer condition in fl ue-cured tobacco.[Methods]Comparison was made among control (CK), farmer's practice (FP) and drip fertilization treatment (DF) by monitoring dry matter accumulation and nitrogen uptake at diff erent stages, comparing growth and development of root system at diff erent stages, measuring activities of NR and GS in leaves of FP and DF treatments, and establishing relative expressions of GS and NITR.[Results]Results showed that:(1)NR activity of DF treatment was significantly higher than that of FP treatment on 20d and 40d after planting,1.26 and 1.31 times higher than FP treatment.Relative gene expression of NITR was also higher than FP treatment. The NR activity of DF treatment fell 60.81% 80d after transplanting, while declined slowly in FP treatment; (2) DF treatment signifi cantly improved root vigor and root volume, and promoted root growth and morphogenesis. N agronomic effi ciency was increased by 93.21% and N partial productivity increased by 15.24%, while soil nitrogen dependence rate decreased by 15.01%;(3) Change of dry matter accumulation and N accumulation of DF and FP treatments were similar. Compared with FP treatment, both accumulation and its rate of dry matter and N in DF treatment were significantly improved. The peak of dry matter accumulation and nitrogen uptake both appeared earlier. With soil nitrogen reduction at late growth stage enabled tobacco leaves mature better and hence quality higher.[Conclusion] The regulation of dry matter and nitrogen accumulation by drip fertilization can have a positive eff ect on the improvement of N use effi ciency, and consequently leaf yield and quality.关键词
烤烟/水肥一体化/干物质积累/氮素吸收/氮代谢Key words
fl ue-cured tobacco/integration of water and fertilizer/dry matter accumulation/nitrogen uptake/nitrogen metabolism引用本文复制引用
席奇亮,杨铁钊,周方,刘超,叶红朝,邢雪霞,赵科,孔德辉..水肥一体化条件下烤烟氮素营养高效利用研究[J].中国烟草学报,2018,24(2):74-83,10.基金项目
中国烟叶公司烟叶技术改进项目"烟草水肥一体化肥料体系研究与可溶性肥料产品开发"(No.3401708) （No.3401708）
中国烟草总公司黑龙江省公司科技开发项目"烤烟水肥一体化提钾增香模式研究与示范"(No.HN201704) （No.HN201704）
