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灌浆期短暂高温胁迫严重影响小麦产量。为了明确灌浆期不同阶段短暂高温胁迫对春小麦籽粒生长的影响,以强筋春小麦品种龙麦26和龙麦30为试材,在人工气候室(25℃/15℃)精确控温和人工温室形成绝对高温胁迫的条件下,分析了灌浆期不同阶段5d短暂高温胁迫对粒重的影响。结果表明,在灌浆期不同阶段短暂高温胁迫处理中,两个小麦品种均表现为:前期高温胁迫对粒重影响最大,达极显著水平(P<0.01);随着高温胁迫处理时期的后移,粒重降低幅度逐渐减小;后期(花后25d)高温胁迫对粒重影响不显著。灌浆期缩短是导致粒重降低的主要原因。
Short-term high temperature stress during grain filling period seriously affected wheat yield. In order to clarify the effect of short-term high-temperature stress on the grain growth of spring wheat at different stages of grain-filling period, the strong-gluten spring wheat variety Longmai 26 and Longmai 30 were used as experimental materials in the artificial climate chamber (25 ℃ / 15 ℃) Under the conditions of absolute high temperature stress, the effects of 5 days short-term high temperature stress on grain weight were analyzed in different stages of grain filling stage. The results showed that the two wheat cultivars showed the greatest effect on the grain weight in the early stage of short-term high-temperature stress treatment (P <0.01). With the high-temperature stress treatment period after the shift , Grain weight decreased gradually reduced; late (25d after flowering) high temperature stress had no significant effect on grain weight. Shortening of the filling stage is the main reason for the decrease of grain weight.