应用生态学报2018，Vol.29Issue(1)：125-132,8.DOI:10.13287/j.1001-9332.201801.036
幼穗形成期低温对水稻结实的影响
Impact of low temperature in young ear formation stage on rice seed setting
摘要
Abstract
A low temperature treatment in rice booting key period was executed on the north slope of Changbai Mountains to construct the impact model of low temperature on rice shell rate,and to reveal the effects of low temperature at different stages of rice young panicle on seed setting.The results showed that effects of low temperature in the young ear formation stage on rice shell rate generally followed the logarithmic function,the lower the temperature was,the greater the temperature influence coefficient was,and the longer the low temperature duration was,the higher rice shell rate was.The seed setting rate was most sensitive to low temperature in the middle time of booting stage (the period from formation to meiosis of the pollen mother cell),followed by the early and later stages.During the booting stage,with 1 ℃ decrease of daily temperature under 2-,3-and 5-day low temperature treatments,the shell rate increased by 0.5,1.7 and 4.3 percentage,respectively,and with 1 ℃ decrease of daily minimum temperature,the shell rate increased by 0.4,1.8 and 4.5 percentage,respectively.The impact of 2-day low temperature was smaller than that of 3 days or more.The impact of accumulative cold-temperature on the shell rate followed exponential function.In the range of harmful low temperature,rice shell rate increased about 8.5 percentage with the accumulative cold-temperature increasing 10 ℃ · d.When the 3 days average temperature dropped to 21.6,18.0 and 15.0 ℃,or the 5 days average temperature dropped to 22.0,20.4 and 18.5 ℃,or the accumulative cold-temperature was more than 8,19,26 ℃ · d,the light,moderate and severe booting stage chilling injury would occur,respectively.In Northeast China,low temperature within 2 d in rice booting stage might not cause moderate and severe chilling injury.关键词
北方粳稻/幼穗形成期/低温处理/空壳率/影响Key words
north japonica/young ear formation period/low temperature treatment/shell rate/influence引用本文复制引用
马树庆,刘晓航,邓奎才,全虎杰,佟丽媛,袭祝香,柴庆荣,杨军..幼穗形成期低温对水稻结实的影响[J].应用生态学报,2018,29(1):125-132,8.基金项目
本文由公益性行业(气象)科研专项(GYHY201306036)资助 This work was supported by the Scientific Research Project of Public Welfare Industry (meteorology)(GYHY201306036). （气象）
