严格意义上的无霜期统计方法探析

Discussion on Statistical Methods of Frost-free Period in Strict Meaning

根据霜冻和无霜期对农作物生长的影响及农业气候区划的指导意义,比较无霜期与严格意义上的“无冻期”的关系和区别,分析霜冻出现的初、终日与霜、结冰现象及气温、地面温度、草面温度≤0℃出现的初日、终日之间的关系,探讨无霜冻期的合理统计方法。同时,通过对鄂东地区的麻城、浠水、黄石三地的无霜期和“无冻期”进行统计,总结两者的差异和特征,从而为正确理解和统计无霜冻期提出一套新方法,为指导农业生产和农业气候区划提供依据。

Based on the effects of frost and frost-free period on crop growth and the guiding significance of agro-climate zoning,the relationship and difference between frost-free period and"no freezing period"in the strict meaning were compared.The relationship between the initial day and the final day of frost and the cream,the icing phenomenon,the temperature,the ground temperature,and the grass surface temperature≤0℃was analyzed,and the reasonable statistical method of"no freezing period"was discussed.Through the statistics of the frost-free period and"no freezing period"in Macheng,Yishui and Huangshi in the eastern part of Hubei Province,the differences and characteristics of the two were summarized,so as to put forward a new set of methods for correctly understanding and counting frost-free periods.It provides the basis for guiding agricultural production and agro-climate zoning.