Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (7): 759-768.DOI: 10.3724/SP.J.1258.2011.00759

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Responses of the spatial-temporal distribution of winter wheat (Triticum aestivum) roots and yield to different ratios of nitrogen sources

XIONG Shu-Ping1, WANG Xiao-Chun2,*(), LI Chun-Ming1,3, MA Xin-Ming1, DU Shao-Yong1, ZHANG Ying-Wu1, LIN Shi-Zhao1   

  1. 1College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
    2College of Life Science, Henan Agricultural University, Zhengzhou 450002, China
    3Henan Academy of Agricultural Sciences, Zhengzhou 450003, China
  • Published:2011-08-18
  • Contact: WANG Xiao-Chun


Aims The study was conducted to reveal the effects of organic manure and urea on root spatial-temporal distributions, root turnover and yield in winter wheat (Triticum aestivum).
Methods Using a minirhizotron root monitoring system, we studied root parameters (diameter, length density, increment, mortality and turnover) and yield of winter wheat ‘Yumai34’ under different fertilizer treatments (chicken manure and urea in ratios of 75 : 25, 50 : 50 and 25 : 75).
Important findings Chicken manure and urea can increase root diameter, length density, increment, mortality and turnover in different growing stages. The 50 : 50 ratio of organic manure to urea had the greatest effect, significantly enhancing the above values. In contrast to no fertilizer treatment and urea treatment, the treatments of different ratios of organic manure to urea can significantly increase the number of effective tillers, grains per spike, grain weight per spike, economic yield and harvest index. Furthermore, both the economic yield and harvest index reached their highest values under the 50 : 50 treatment, and the differences with other treatments were statistically significant. Considering the general factors such as wheat grain yield and harvest index, the equivalent ratio of organic manure to urea had the largest effects and resulted in the highest wheat grain yield.

Key words: minirhizotron, nitrogen sources, root, spatial-temporal distribution, Triticum aestivum, yield