| 习金根，陈河龙，谭施北，高建明，张世清，郑金龙，易克贤.不同施氮水平对剑麻生长的影响[J].广东农业科学,2013,40(9):62-64 |
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不同施氮水平对剑麻生长的影响 |
| Effect of different nitrogen levels on the growth of sisal |
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| DOI： |
| 中文关键词: 剑麻 氮水平 氮素利用效率 |
| 英文关键词: sisal N levels N use efficiency |
| 基金项目:国家麻类产业技术体系建设专项（CARS-19） |
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| 摘要点击次数: 2334 |
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| 中文摘要: |
| 通过盆栽试验，研究不同氮水平（0、0.1、0.2、0.4、0.8、1.6g/kg土）对剑麻幼苗地上部和根系生物量、养分含量、氮肥利用效率的影响。结果表明，剑麻地上部和根系生物量（干重）、氮肥回收率、氮肥农学利用率均在施氮水平为0.1g/kg土时最高，地上部、根系干重分别为15.39、2.30g/株，为对照的128%、131%；氮肥回收率、氮肥农学利用率分别为12.68%、8.48 kg/kg；而施氮水平为1.6 g/kg土时，剑麻地上部和根系生物量反而降低；与对照相比，适量施氮明显增加剑麻地上部生物量，但各施氮处理之间差异不显著；剑麻根系生物量则随着施氮水平的增加呈先上升后下降的趋势；剑麻地上部和根系含氮量、植株氮素积累量总体上随着施氮水平的升高而升高，而氮肥回收率、氮肥农学利用率则随着施氮水平的升高而降低。 |
| 英文摘要: |
| Using sisal seeding as materials, pot-culture experiment was used to study the effect of different nitrogen levels on the growth, including the plant total biomass, root biomass, leaf N-contents , root N-contents and N use efficiency. Result showed that when the nitrogen fertilizer was applied in the amount of 0.1 g/kg gram per plant, the plant total biomass and the root biomass were the largest,N recovery efficiency and N use efficiency were the best. The plant total biomass and the root biomass were the least when the nitrogen nutrition levels was 1.6 g/kg gram per plant. When supplied with 0.1，0.2，0.4，0.8 g/kg gram nitrogen per plant, the plant total biomass was larger than that of under 0 g/kg gram per plant. But with the nitrogen nutrition levels increasing, the root biomass decreased. With the
nitrogen nutrition levels increasing, leaf N-contents, root N-contents and N-accumulation of the plant increased, on the contrary, N recovery efficiency and N use efficiency decreased. |
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