摘要
高温热害是影响南充市水稻生产的主要农业气象灾害之一,研究该市高温热害的发生规律及与水稻产量波动的关系,为稳定该地区水稻产量、保障水稻正常生产提供科学参考。笔者利用南充市7个气象观测站1960—2014年的气象资料,分析高温热害发生频次的时空分布规律。同时,借助小波分析工具,结合南充市高坪区1981—2014年的一季稻产量资料,分析高温热害对南充市水稻产量的影响。结果表明:南充市高温热害主要以轻度为主,中度次之,重度最少,总热害发生频次表现为先减后增的趋势,在20世纪80年代发生频次较低,研究区南部的高温热害多于北部;高温热害与相对气象产量在2000年后存在3~4年的显著反向共振周期。高温热害是影响南充市2000年后水稻产量波动的主要农业气象灾害,本研究结果可为相关部门合理安排生产布局、制定高温热害防御措施提供科学依据。
Heat damage is one of the major agricultural meteorological disasters affecting rice production inNanchong. By studying the occurrence regularity of heat damage and its relationship with the fluctation of riceyield, we aim to provide a reference for stabilizing rice yield in Nanchong. Based on the data during 1960-2014 from 7 meteorological stations in Nanchong, we analyzed the temporal and spatial distribution of heatdamage; meanwhile, combined with rice yield from 1981 to 2014 in Gaoping, explored the influence of heatdamage on rice yield with the wavelet analysis.The results showed that： heat damages in Nanchong were mostlyof mild degree, followed by moderate degree, and then was severe degree; the occurrence frequency of totalheat damages had a trend of first decrease and then increase; there was lower occurrence frequency of heatdamage in 1980 s; the south of the study area had more heat damage than that of the north; there was asignificant reverse resonance period of 3-4 a between relative meteorological yield and heat damage after2000. Heat damage becomes a major agricultural meteorological disaster which influences rice yieldfluctuation in Nanchong after 2000. The results could provide a basis for relevant departments to formulaterational production layout and mitigation measures for heat damage.
作者
黄维
郑慧琳
刘永裕
吴炫柯
Huang Wei;Zheng Huilin;Liu Yongyu;Wu Xuanke(Liuzhou Agrometeorological Experimentation Station,Liuzhou Guangxi 545003;~Yingshan Meteorological Bureau,Nanchong Sichuan 63770)
出处
《中国农学通报》
2018年第30期101-109,共9页
Chinese Agricultural Science Bulletin
基金
南充市气象局2017年度科学技术研究开发课题"营山县核桃生长气象条件分析与服务方法研究"(南气课题2017-01)
关键词
高温热害
小波分析
相对气象产量
南充市
heat damage
wavelet analysis
relative meteorological yield
Nanchong
