Climate warming will lead to serious reduction of wheat production

According to a report released by researchers from Stanford University on the 29th, extreme high temperature weather will lead to wheat premature and yield reduction, which has been underestimated by previous models about the relationship between global climate change and wheat yield reduction In the Ganges plain, India's main food producing region, wheat is planted in November and harvested at the turn of spring and summer David Lobel and other researchers from Stanford University analyzed the relationship between the temperature change and the wheat growth in the Ganghe plain by using the nine-year data obtained from the earth observation satellite They found that if the average temperature in that year is higher than the normal value, the time for wheat to turn from green to yellow, that is to say, to stop growing will be correspondingly advanced; if the temperature continues to be higher than 34 ℃, the effect on wheat color will be very obvious, and the critical filling period for wheat yield will be significantly shortened Scientists have known before that if the temperature at night exceeds 34 ℃, the photosynthesis mechanism of wheat will be destroyed, with the consequence of early maturity and reduced yield of wheat Small scale research conducted in Australia also shows that when the temperature is above 14 ℃, the yield of wheat will be reduced by about 5% for every 1 ℃ increase The research of Lobel et al Shows that under high temperature, the yield reduction of wheat may be more rapid and larger They calculated that if the global temperature increased by 2c, the yield reduction of wheat would be 50% greater than the current model predicted The study was published the same day in the journal nature climate change.