Chinese Journal of Agrometeorology ›› 2018, Vol. 39 ›› Issue (11): 751-761.doi: 10.3969/j.issn.1000-6362.2018.11.006

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Effect of Low Temperature Treatment in Booting and Filling Stage on Yield Components and Quality of Main Rice Cultivars in Sanjiang Plain

CHU Chun-yan , WANG Jin-dong , CHENG Yuan, ZHANG Yu, SUN Gui-yu   

  1. Jiamusi Meteorological Bureau, Jiamusi 154004, China
  • Online:2018-11-20 Published:2018-11-13

Abstract: Three main rice cultivars in Sanjiang Plain Longjing 29, Longjing31 and Longjing46 were selected and simulated low temperature stress at 16℃ by manual climatic box for 5 days to investigate the effect of rice cold tolerance at the booting, heading and filling stages on the yield components, milling quality, nutritional quality and RVA profile characteristics. The results showed that the seed setting rate, 1000-grain weight, brown rice rate, polished rice rate, whole milled rice rate and taste score of rice decreased and there was a significant difference compared with the control treatment after being treated by low temperature treatment during the booting stage, heading stage and filling stage (P < 0.05). The protein content increased significantly, and the amylose content decreased significantly at the booting and heading stage, and gradually increased during the filling stage. The final stage of filling was higher than the control treatment.The RVA profile characteristics increased or decreased compared with the control treatment due to the differences in varieties, but they both presented significant differences (P < 0.05). The low temperature stress had the greatest impact on rice yield, grinding quality and nutrient quality at booting stage, while the impact of low temperature stress to RVA profile characteristics was the greatest at filling stage, and there were significant differences among the three varieties (P < 0.05). Under low temperature stress, compared with the yield component of Longjing 46 were no significant difference except the 1000-grain weight compared with the CK at booting stage. Longjing 46 showed strong tolerance to low temperature. Low temperature had the least impact on the grinding quality and nutrient quality of Longjing 29 and RVA profile characteristics of Longjing 46. Rice production and cultivation, resistance breeding and certification of climate quality of rice in Sanjiang plain should comprehensively consider the quality indexes of main varieties, adopt appropriate measures of rice quality optimization cultivation during the period of booting-filling stage, and conduct climatic quality certification for rice according to the science of climate change.

Key words: Rice, Sanjiang plain, Booting-filling stages, Low temperature stress, Rice quality