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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (7): 1369-1373.doi: 10.3724/SP.J.1006.2009.01369

• RESEARCH ACTIVITIES • Previous Articles     Next Articles

Effects of Chemical Ripeners on photosynthetic Characteristics of Pods and Rapeseed Quality and Yield

ZHOU Ke-Jin1,2,GUAN Chun-Yun1,*,XIAO Wen-Na2,TAN Tai-Long1   

  1. 1College of Agriculture,Hunan Agricultural University,Changsha 410128,China;2College of Agriculture,Anhui Agricultural University,Hefei 230036，China
  • Received:2008-11-18 Revised:2009-03-20 Online:2009-07-12 Published:2009-05-19
  • Contact: GUAN Chun-Yun, E-mail: guancy2000@yahoo.com.cn

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Abstract:

We investigated the effects of chemical ripeners Diguat and Roundup on photosynthetic rate, gas exchange parameters and chlorophyll content in pods, 1000-grain weight and yield and oil content through gas exchange measuring technology during the latest stage of pod growth. The ripener Diquat, with a good effect on accelerating pods ripening, damaged pod peel chlorophyll seriously, decreasedphotosynthetic rate, and light-energy utilization efficiency rapidly, so that the 1000-grain weight, yield and quality decreased largely, which sensitively depends on the Diquat content. In comparison, the ripener Roundup, with a slow effect on pods ripening, had a less injury on pod growth and a higher photosynthetic rate, so that the yield and quality of grains were higher. Our investigations disclosed a close relationship of grain yield and oil content with Pnand chlorophyll content, proving the importance of utilization efficiency of light energy in the latest stage of pods ripening on the grain yield and oil accumulation. In production, we recommend an appropriate ripener recipe of 0.1% Diguat or 0.8% Roundup for accelerating pods ripening with a less loss of the grain yield.

Key words: Rapeseed pods, Photosynthesis characteristics, Chlorophyll content, Chemical ripener, yield, quality

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