太阳辐射减弱对冬小麦生长发育及产量的影响

摘要

[目的]研究太阳辐射减弱对冬小麦生长发育及产量的影响.[方法]通过盆栽模拟试验,设置不同的太阳辐射减弱梯度(自然光、70％太阳辐射、50％太阳辐射),研究太阳辐射减弱对冬小麦干物质积累及产量的影响.[结果]太阳辐射减弱使冬小麦生育期延长,穗、叶和茎等干物质积累减少.太阳辐射减弱下,有效穗数、穗粒数、穗重、千粒重等产量构成指标下降.[结论]太阳辐射减弱对冬小麦的生长发育和产量存在明显的抑制效应.%[Objective] The research aimed to study the effects of weaker solar radiation on the growth and yield of winter wheat.[Method] Through pot simulation test,we set different weakened gradients of solar radiation (natural light,70％ solar radiation,50％ solar radiation) to study the effect of weaker solar radiation on the dry matter accumulation and yield of winter wheat.[Result] Weakening solar radiation prolonged the growth period of winter wheat and reduced the accumulation of spike,leaf and stem dry matter.Under the weakened solar radiation,the yield index of effective spike,grain number per spike,panicle weight and 1 000-grain weight decreased.[Conclusion] The weaker solar radiation had obvious inhibitory effect on the growth and yield of winter wheat.