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Chinese Journal of Applied Ecology ›› 2001, Vol. ›› Issue (1): 55-58.

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Comprehensive evaluation on the effect of chemical regulation agent on rice injured by insufficient illumination during its heading-filling period

WEI Chaoling1, LIU Minhua1, LI Lin2   

  1. 1. Agronomy Department, Anhui Agricultural University, Hefei 230036;
    2.Modernization Research Institute of Jiangsu Academy of Agricultural Sciences, Nanjing 210014
  • Received:1999-12-21 Revised:2000-03-23 Online:2001-01-25

Abstract: Main indexes of rice injury by insufficient illumination (Ⅱ) were selected through Gray Relation,and the effect of regulation agent on rice injured by Ⅱ at different stages during heading-filling period was analyzed using Gradation Analysis, Fuzzy Comprehensive Evaluation.The results showed that the percentage of filled-grain,net assimilation rate, root activity were the top three indexes subject to injury.Application of chemical regulation agent when the injury occured 6~20 days after heading had the best effect,with a degree of subordinacy of 0.7869.

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