Journal of Integrative Agriculture ›› 2012, Vol. 12 ›› Issue (6): 1020-1025.DOI: 10.1016/S1671-2927(00)8626

• 论文 • 上一篇    下一篇

Effects of Nitrogen Management on the Yield of WinterWheat in Cold Area of Northeastern China

 LI Lian-peng, LUO Sheng-guo, PENG Xian-long   

  1. Resource and Environment College, Northeast Agricultural University, Harbin 150030, P.R.China
  • 收稿日期:2011-04-12 出版日期:2012-06-01 发布日期:2012-07-20
  • 通讯作者: PENG Xian-long, Tel: +86-451-55190394, E-mail: pxl0508@163.com
  • 作者简介:LI Lian-peng, Tel: +86-451-55190394, E-mail: llplz92@yahoo.com.cn
  • 基金资助:

    The present investigation was financially supported by grants from the National Basic Research Program of China (973 Program, 2009CB118606) and Special Fund for Agro-Scientific Research in the Public Interest, China (201103003).

Effects of Nitrogen Management on the Yield of WinterWheat in Cold Area of Northeastern China

 LI Lian-peng, LUO Sheng-guo, PENG Xian-long   

  1. Resource and Environment College, Northeast Agricultural University, Harbin 150030, P.R.China
  • Received:2011-04-12 Online:2012-06-01 Published:2012-07-20
  • Contact: PENG Xian-long, Tel: +86-451-55190394, E-mail: pxl0508@163.com
  • About author:LI Lian-peng, Tel: +86-451-55190394, E-mail: llplz92@yahoo.com.cn
  • Supported by:

    The present investigation was financially supported by grants from the National Basic Research Program of China (973 Program, 2009CB118606) and Special Fund for Agro-Scientific Research in the Public Interest, China (201103003).

摘要: A plot experiment including four treatments, CK (N 105 kg ha-1 as urea, including a basal N application of 35 kg ha-1 and a topdressing N 70 kg ha-1 at turned green stage) and optimized N management (OPT1, OPT2 and OPT3, applied two-thirds, one-third and two-fifths N at jointing stage, respectively, total N 60 kg ha-1), was conducted to evaluate the effects of nitrogen management on growth and N uptake of winter wheat (Triticum aestivum), Dongnong 1, which is the first highly cold tolerant winter wheat in China. Index of population quality, N uptake and yield were determined. The ear-bearing tiller rate was increased by above 12%, and the leaf area index, biomass and N uptake were significantly decreased (P<0.05) at jointing stage. OPT treatments increased the grain to leaf area ratio at heading stage, the dry matter weight and N uptake after heading by 14.3-27.9%, 11.6-28.7% and 118.1-161.8 %, respectively. The yield of the OPT treatments was increased by 14.2-37.5% compared with CK, and there was a significant difference (P<0.05) between CK and OPT1 treatments. Harvest index and N partial factor productivity (PFP, kg grain yield per kg N applied) was clearly enhanced from 0.4 and 35.6 kg, respectively for CK to an average of 0.48 (P<0.05) and 77.6 kg (P<0.05) in the OPT treatments. These results indicated that the optimized N management increased the harvest index, yield and N use efficiency by decreasing the N application rate and postponing N application time, improved wheat population quality, controlled excessive growth in the vegetative stages and increased dry matter and N accumulation rates after heading.

关键词: cold area, winter wheat (Triticum aestivum), N management, population quality, yield

Abstract: A plot experiment including four treatments, CK (N 105 kg ha-1 as urea, including a basal N application of 35 kg ha-1 and a topdressing N 70 kg ha-1 at turned green stage) and optimized N management (OPT1, OPT2 and OPT3, applied two-thirds, one-third and two-fifths N at jointing stage, respectively, total N 60 kg ha-1), was conducted to evaluate the effects of nitrogen management on growth and N uptake of winter wheat (Triticum aestivum), Dongnong 1, which is the first highly cold tolerant winter wheat in China. Index of population quality, N uptake and yield were determined. The ear-bearing tiller rate was increased by above 12%, and the leaf area index, biomass and N uptake were significantly decreased (P<0.05) at jointing stage. OPT treatments increased the grain to leaf area ratio at heading stage, the dry matter weight and N uptake after heading by 14.3-27.9%, 11.6-28.7% and 118.1-161.8 %, respectively. The yield of the OPT treatments was increased by 14.2-37.5% compared with CK, and there was a significant difference (P<0.05) between CK and OPT1 treatments. Harvest index and N partial factor productivity (PFP, kg grain yield per kg N applied) was clearly enhanced from 0.4 and 35.6 kg, respectively for CK to an average of 0.48 (P<0.05) and 77.6 kg (P<0.05) in the OPT treatments. These results indicated that the optimized N management increased the harvest index, yield and N use efficiency by decreasing the N application rate and postponing N application time, improved wheat population quality, controlled excessive growth in the vegetative stages and increased dry matter and N accumulation rates after heading.

Key words: cold area, winter wheat (Triticum aestivum), N management, population quality, yield