Extreme Climatic Characteristics and Their Effects on Maize Yield in Hei-longjiang Province from 1961 to 2020  

作　　者：Zhao Chang-shuai Fu Hong-tai Yuan Ying-ying Li Xin-li Sun Yan-kun 

机构地区：[1]College of Resources and Environmental Sciences,Northeast Agricultural University,Harbin 150030,China [2]Harbin Meteorological Bureau,Harbin 150010,China

出　　处：《Journal of Northeast Agricultural University(English Edition)》2023年第3期44-59,共16页东北农业大学学报（英文版）

基　　金：Supported by the"Thirteenth Five-Year"Key Research and Development Project Sub-project"Integration and Demonstration of Spring Maize Solar and Hot Water Resources Utilization Technology in Humid Areas of Heilongjiang Province"(2018YFD0300103-1)。

摘　　要：This paper analyzed the extreme climatic characteristics of maize in Heilongjiang Province during different growth periods using the climate data and maize yield data from 1961 to 2020,and applied the principal component analysis to analyze the extent of different extreme climatic events affecting maize yield.The results showed that the extreme cold events showed a decreasing trend,and the extreme warm events showed an increasing trend,and the trend of extreme precipitation change was not obvious.Maize yield was negatively correlated with TN10p(cold nights),TX10p(warm days)and T8(days below the lower temperature limit),and positively correlated with TN90p(warm nights).T34(days above the upper temperature limit)and TX90p(warm days)during the tasseling-milking period were negatively correlated with the maize yield,and this part was concentrated in the southern part of Heilongjiang Province.The maize yield was positively correlated with the extreme precipitation during the seedling period and negatively correlated with the extreme precipitation during the filling-maturity period of maize,but the correlations were not significant.The effects of extreme weather events on maize yield were higher during the seedling and the filling-maturity periods than those during the jointing-tasseling and the tasseling-milking periods.The effects of extreme precipitation on the maize yield were less than those of the extreme temperature during different growth periods in all regions,but the effects of the extreme precipitation on maize yield were significantly higher in the Songnen Plain than those in other regions.There were regional differences in the impact of climate extremes on maize during different growth periods.The area with the greater impact of climate extremes during the seedling period was the Songnen Plain,the areas with the greater impact of climate extremes during the jointing-tasseling period were the northern part of the Sanjiang Plain,and the areas with the greater impact of climate extremes during the filling-mat

关 键 词：extreme temperature extreme precipitation maize yield maize growth period 

分 类 号：S513[农业科学—作物学]