中国烟草科学2015，Vol.36Issue(5)：13-18,6.DOI:10.13496/j.issn.1007-5119.2015.05.003
氮素形态对烟苗根系生长及碳、氮积累的影响
Effect of Nitrogen form on Root Growth and C and N Accumulation of Flue-cured Tobacco Seedlings
摘要
Abstract
In order to investigate the response of root growth, C and N accumulation of flue-cured tobacco seedlings to different nitrogen forms, hydroponic experiments were conducted by supplying equal amount of N in three different ratios of NH4+:NO3- (100:0, as 100-0AN; 50:50, as 50-50AN; 0:100, as 0-100AN) to seedlings of flue-cured tobacco cultivar NC55. Plant dry biomass, root morphology, C and N content, C and N accumulation were assayed during the cultivation. The results showed that shoot and total biomass showed 0-100AN>50-50AN>100-0AN at all treating times. On 7 and 14 d, root biomass, root total length, root total volume, root total surface area, C and N accumulation of root, stem, leaf and total nitrogen accumulation showed 0-100AN>50-50AN>100-0AN. On 21 d, the same parameters showed 50-50AN>0-100AN>100-0AN. Ammonium as sole nitrogen source inhibited flue-cured tobacco growth. Nitrate is beneficial to shoot growth and carbon accumulation, it however inhibits root growth as sole nitrogen source for prolonged time. Optimum nitrogen form for root development, C and N accumulation is the mixture of ammonium and nitrate.关键词
烤烟/氮素形态/根系形态/碳积累量/氮积累量Key words
flue-cured tobacco/nitrogen form/root morphology/carbon accumulation/nitrogen accumulation分类
农业科技引用本文复制引用
邢瑶,孙泽东,陈乐,马兴华,张本强,郑成鹏..氮素形态对烟苗根系生长及碳、氮积累的影响[J].中国烟草科学,2015,36(5):13-18,6.基金项目
公益性行业(农业)科研专项经费"烟草增香减害关键技术研究与示范"(201203091) （农业）
中国烟草总公司特色优质烟叶开发重大专项"低危害烟叶研究开发"(110201101006 ts-06) （110201101006 ts-06）
