越冬前增温对商麦156生长发育的影响

Effect of Temperature Increased before Over-wintering Period on the Growth of Shangmai 156

为了探究越冬前增温对商麦156生长和产量的影响,2016—2017年在可移动温室内部进行小麦越冬前增温模拟试验。结果表明,越冬前增温对小麦的生长发育和产量影响显著。实际气温下积温达到481.7℃时,叶绿素含量和净光合速率最高;增温后积温达到543.4℃时,叶绿素含量和净光合速率最低。可见,越冬前增温过高并不利于小麦叶绿素含量和光合速率的提高。3个增温处理下小麦均有不同程度的增产,在积温达到518.4℃时,产量三要素均为最高;但是当积温达到543.4℃时,产量三要素又有所降低。所以,适度的增温对小麦单产提高有积极作用。

To explore the effect of over-wintering temperature increase on the growth and yield of Shangmai 156, a simulation experiment on over-wintering temperature increase of wheat was carried out in a portable greenhouse from 2016 to 2017. The results showed that the temperature increased before over-wintering had a significant effect on the growth and yield of wheat. When accumulated temperature in actual temperature was 481.7 ℃, the chlorophyll content and net photosynthetic rate were the highest. When accumulated temperature after increasing temperature was 543.4 ℃, the chlorophyll content and net photosynthetic rate was the lowest. It can be seen that high temperature increase before winter is not conducive to the increase of chlorophyll content and photosynthetic rate of wheat.Wheat yields were increased to varying degrees under 3 warming treatments. When the accumulated temperature was 518.4 ℃, the three elements of production were the highest, but the accumulated temperature was 543.4 ℃, three elements of yield decreased. So moderate increase temperature has a positive effect on the increase of wheat yield per unit area.