• ISSN 1008-505X
  • CN 11-3996/S
王鹏, 曾玲玲, 王发鹏, 周建朝, 张维理, 李志宏. 黄壤上烤烟氮素积累、分配及利用的研究[J]. 植物营养与肥料学报, 2009, 15(3): 677-682.
引用本文: 王鹏, 曾玲玲, 王发鹏, 周建朝, 张维理, 李志宏. 黄壤上烤烟氮素积累、分配及利用的研究[J]. 植物营养与肥料学报, 2009, 15(3): 677-682.
WANG Peng, ZENG Ling-ling, WANG Fa-peng, ZHOU Jian-chao, ZHANG Wei-li, LI Zhi-hong. Study of 15N accumulation, distribution and utilization in flue-cured tobacco on yellow soils[J]. Journal of Plant Nutrition and Fertilizers, 2009, 15(3): 677-682.
Citation: WANG Peng, ZENG Ling-ling, WANG Fa-peng, ZHOU Jian-chao, ZHANG Wei-li, LI Zhi-hong. Study of 15N accumulation, distribution and utilization in flue-cured tobacco on yellow soils[J]. Journal of Plant Nutrition and Fertilizers, 2009, 15(3): 677-682.

黄壤上烤烟氮素积累、分配及利用的研究

Study of 15N accumulation, distribution and utilization in flue-cured tobacco on yellow soils

  • 摘要: 田间条件下,利用同位素15N示踪技术于黄壤有机质含量分别为19.2和40.7 g/kg和当地推荐最佳氮肥用量基础上,设15N用量分别为105和82.5 kg/hm2的情况下,研究了两个试验点烤烟15N积累、吸收比例、氮素利用率及15N在各器官分配。结果表明,在二种有机质含量的黄壤上,烤烟15N吸收规律相似,于烤烟移栽后3~5周内,烟株吸收15N较少,5周后15N积累量明显增加,到移栽后13周达到高峰,肥料15N吸收时间拖后;二种土壤上,肥料15N在整个生育期内积累量分别为28.41和26.55 kg/hm2。烟株于移栽后3~5周来自肥料15N占吸收总氮的比例为53.84%~71.33%,氮(15N)肥利用率为1.11%~7.34%;到烟叶采收结束(移栽后17周)时,烟株来自肥料15N占吸收总氮的比例为28.69%~29.75%,氮(15N)肥利用率为27.06%~32.18%。各个部位烟叶采收结束时,二种土壤上,肥料15N在上部、中部、下部烟叶及茎和花积累分别占吸收肥料总15N的35.08%~35.26%、25.87%~26.19%、17.92%~18.25%和22.73%~24.49%,肥料15N主要集中在中、上部烟叶。可见,肥料氮吸收时期拖后,土壤后期供氮能力强和中上部烟叶肥料氮比例较高是黄壤烟区烤烟氮素营养存在的主要问题。

     

    Abstract: Field experiments aimed at the fertilizer 15N uptake, accumulation, distribution and use efficiency in flue-cured tobacco was conducted using 15N trace technique in yellow soil in Dafang county of Guizhou province. Two organic matter levels (19.2 and 40.70 g/kg) and two N application rates (105 and 82.5 kg/hm2) were involved. The results showed that only a small part of fertilizer 15N was absorbed in the first 3-5 weeks after transplanting (WAT). However, 15N accumulation increased rapidly since the fifth WAT and reached its maximum at the 13 WAT. The amount of 15N accumulation were 28.41 and 26.55 kg/hm2 for two organic matter level soil at harvest. The 15N uptake was increased with increasing N fertilizer applied. Ratio of N from 15N fertilizer to total N uptake decreased as the plant growth stages. It was ranged from 53.84% to 71.33% in the 3-5 WAT and 27.06% to 32.18% in the 17 WAT. The N use efficiency was 1.11% to 7.34% in 3-5 WAT and 28.69% to 29.75% in the 17 WAT. The 15N distribution at upper, middle, lower leaves and stem and flowers accounted for 35.08% to 35.26%, 25.87% to 26.19%, 17.92% to 18.25% and 22.73% to 24.49% to total 15N uptake respectively. Fertilizer 15N uptake was mainly cumulated in middle and upper leaves. The postponed fertilizer15N absorption, unsynchronized supplication of soil mineralized N at late growth stage, and higher 15N accumulation in upper and middle leaves of tobacco were the key problems of nutrient management of tobacco to deal with in yellow soil.

     

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