2013年极端高温对合肥一季稻的影响分析

为了研究一季稻生长对高温胁迫的响应，更好地补充和完善一季稻高温热害气象指标，本研究利用2013年合肥夏季高温数据和田间试验数据，运用统计分析方法对2013年合肥地区出现的极端高温对田间试验的一季稻‘徽两优6号’抽穗扬花过程以及结实率产生的影响进行分析。结果表明：一季稻抽穗扬花期是对高温最敏感的时期；验证了已建立的高温热害气象指标，并对其补充完善：抽穗扬花当天和前后2~5天的持续高温对一季稻的影响最为严重。进一步分析表明：高温天气直接造成空秕率明显上升，结实率下降。

Analysis of extreme high-temperature effects to the single cropping rice in Hefei

The paper aims to study on rice in response to heat stress and complement meteorological index of high temperature damage to single cropping rice. Based on data of high temperature in Hefei, using the method of field experiments and statistical analysis, the author analyzed the effects of high-temperature to the single cropping rice of filed trial No.6 Huiliangyou at heading and flowering stage and seed-setting rate. The results showed that heading and flowering period of single cropping rice is the most sensitive to high-temperature. The meteorological index of high temperature established is verified and complemented: the effects of high-temperature to rice is the most serious on the same day of heading and flowering and 2-5d around it. Further analysis showed that the rice sterile rate and abortive grain rate were significantly increased and the rate of seed setting declined with the harm of hot disaster by high-temperature.