Effects of meteorological factors on yield per unit area of summer maize in Henan Province based on wavelet analysis
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摘要：
[目的]全球气候变暖已对农业生产产生深远的影响.传统的多元线性回归分析方法不能直接分析气象因子与夏玉米气象单产间的周期变化.[方法]根据1988-2018年河南省13个气象站点的气象数据,利用连续小波变换分析方法探讨了河南省31 a夏玉米全生育期(6月至9月按旬分段)的平均温度、降水量、日照时数、气象单产的周期变化特征;利用相干小波变换分析方法探讨了气象因子与夏玉米气象单产间的相互影响关系.[结果](1)近31 a,河南省夏玉米气象单产占实际单产的比重逐渐降低,对于气象灾害抵御能力逐步增强.(2)从周期变化来看,6月上旬的平均温度有6 a显著周期变化;8月中旬的平均温度有2~3 a显著周期变化;7月下旬的降水量有2~6 a显著周期变化;8月中旬的日照时数有2 a和3 a显著周期变化;夏玉米气象单产有2 a显著周期变化.(3)从气象因子与夏玉米气象单产间的关系来看,6月上旬种子萌发期平均温度和8月中旬灌浆期平均温度与夏玉米气象单产呈负相关关系;7月下旬抽雄期降水量与夏玉米气象单产呈正相关关系;8月中旬灌浆期日照时数与夏玉米气象单产呈正相关关系.[结论]6月上旬种子萌发期和8月中旬灌浆期平均温度的降低,7月下旬抽雄期降水量和8月中旬灌浆期日照时数的增加有助于提升夏玉米单产.
[Objective]Agriculture is sensitive to climate change.Traditional multiple linear regression analysis method cannot directly analyze the periodic change between meteorological factors and summer maize meteorological yield.[Methods]Based on the meteorological data of 13 meteorological stations in Henan Province from 1988 to 2018,we analyzed the correlation of meteorological factors(i.e.,average temperature,precipitation,sunshine duration)and meteorological yield by multi-level wavelet analysis.[Results]The results showed that the proportion of meteorological yield to actual yield of summer maize periodic change in Henan Province in recent 31 years,which indicated that the ability to resist meteorological disasters gradually increased.The average temperature in early June and in mid-August have a significant periodic change of 6 a and 2-3 a,respectively.Precipitation in late July showed a significant periodic change of 2-6 a.In the middle of August,the sunshine duration had a significant periodic change of 2 a and 3 a.The meteorological yield of summer maize had a significant periodic change of 2 a.Furthermore,the mean temperature at seed germination stage in early June and the mean temperature at filling stage in mid-August were negatively correlated with meteorological yield of summer maize.Precipitation at tasseling stage in late July were positively correlated with meteorological yield of summer maize.Sunshine hours at filling stage in mid-August were mainly positively correlated with meteorological yield of summer maize.[Conclusion]The decrease of average temperature during seed germination stage in early June and filling stage in mid-August,the increase of precipitation during tasseling stage in late July and sunshine duration during filling stage in mid-August contributed to the improvement of summer maize yield.
作者：
邵云 刘玘 李春喜 杨俊华 王岚 侯盟 闫广轩
Shao Yun;Liu Qi;Li Chunxi;Yang Junhua;Wang Lan;Hou Meng;Yan Guangxuan(College of Life Sciences,Henan Normal University,Xinxiang 453007,China;College of Environment,Henan Normal University,Xinxiang 453007,China)
机构地区：
河南师范大学生命科学学院
出处：
《河南师范大学学报:自然科学版》 CAS 北大核心 2023年第6期108-115,I0004,共9页
Journal of Henan Normal University(Natural Science Edition)
基金：
国家重点研发计划项目(2016YFD0300203-3,2018YFD0300708-4).
关键词：
夏玉米 小波分析 气象因子 单产
summer maize wavelet analysis meteorological factors yield per unit area
分类号：
S162.5 [农业科学—农业气象学]
