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

Abstract

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.

Key words: Chemical regulation agent, Rice, Insufficient illumination, Heading-filling, Comprehensive evaluation

CLC Number:

Q946

WEI Chaoling, LIU Minhua, LI Lin. Comprehensive evaluation on the effect of chemical regulation agent on rice injured by insufficient illumination during its heading-filling period[J]. Chinese Journal of Applied Ecology, 2001, (1): 55-58.

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