Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (8): 1489-1498.doi: 10.3864/j.issn.0578-1752.2012.08.004

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY·AGRICULTURE INFORMATION TECHNOLOGY • Previous Articles     Next Articles

Effects of Different Day and Night Temperature Enhancements on Wheat Grain Yield and Quality after Anthesis under Free Air Controlled Condition

南京农业大学农学院/农业部南方作物生理生态重点开放实验室，南京 210095   

  1. 1.南京农业大学农学院/农业部南方作物生理生态重点开放实验室，南京 210095
  • Received:2011-09-22 Online:2012-04-15 Published:2012-02-03

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Abstract: 【Objective】 The study is to explore the effects of free air temperature enhancement on wheat grain yield and quality after anthesis and provides a theoretical basis for global warming affecting on wheat of Jianghuai region.【Method】Field experiments of Yangmai 16 under the warming treatments with different times (all day time, daytime and nighttime warming) and different ranges (1.5 and 3℃) by using free-air temperature enhancement (FATE) technique were conducted in Danyang to simulate the effects of warming climate on the yield and quality including protein and starch in 2010 and 2011. 【Result】 Although the actual temperatures were below the anticipated ones, compared to the control, the results showed that a downturn of yield resulted from the decrease of grain number per spike and grain weigh, the former and latter were sensitive to night and day warming, respectively. The decrease amplitude aggravated accompanied with the increasing warming levels. The result also showed that yields of all-day warming treatment lost most at different warming levels among the three warming scenarios. If the mean daily temperature increased by about 1.8℃ on the basis of mean temperature of all-day time, daytime and nighttime at about 20.8, 23.7, 16.9℃, yield losses could be up to 22.3%. Temperature enhancement after anthesis increased the content of crude protein and wet gluten, compared to other treatments, the treatment 6 (night warming 3℃) increased most of two years results and the increasing ranges were respectively 7.9%(2010) and 13.2%(2011). The effect of warming on components of protein was complex. But that on glutenin was greater than that on albumin, globulin and gliadin, the synthesize and accumulation of glutenin could be easily controlled by the temperature. Meanwhile, temperature enhancement after anthesis had no significantly effect on the content of starch. 【Conclusion】 Temperature enhancement resulted in yield reduction of the wheat without changing the growing process before anthesis, meanwhile, the constitution of grain would also be significantly changed, which led to poor quality.

Key words: free air temperature enhancement, wheat, yields, grain quality

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