Climate Change of 24 Solar Terms and the Response of Spring Wheat Phenology in Shapotou Area from 1985 to 2015
Using the daily meteorological data of Shapotou and the phenological data of spring wheat,the climate change of 24 solar terms and the response of spring wheat were analyzed by statistical methods.The results showed that the average temperature of the 24 solar term in Shapotou area showed a single peak type quasi normal distribution,slight heat and great heat were the most hot solar term,the average temperature was 23.1 ℃,but slight cold was the most cold solar term,the average temperature was-7.3 ℃.The change trend of average temperature with time showed a single peak and single valley type,the maximum temperature rise appeared in spring equinox(0.25 ℃/d),the maximum cooling rate appeared in first frost(-0.26 ℃/d).The variables curve of the average temperature between adjacent solar term was single peak and single valley type,the peak appeared in Qingming,variable up to 0.22 ℃,which was the fastest rising solar term;the valley value appeared in first frost,variable was-5.5 ℃,which was the most significant solar term of temperature drop.With the global warming,the average temperature of each solar term after 16 years (from 2000 to 2015)was generally higher than that of the previous 15 years (from 1985 to 1999),the difference was 0.2-3.3 ℃.In four solar terms reflecting the phenological phenomenon (Jingzhe,Qingming,Mangzhong,slight heat),the average temperature with the year was significantly increased in Mangzhong and slight heat.The average temperature had a significant effect on the phenological period,the increase of temperature accelerated the phonological process,the vegetative growth period of spring wheat was prolonged,the reproductive growth period was shortened,and the whole growth period was shortened.
24 solar termsClimate changeSpring wheatPhenologyResponseShapotou area
国家科技期刊平台
NSTL
万方数据
维普
