烤烟烟叶钾含量与气象因子的关系分析

Analysis on Relationship Between Potassium Content in Flue-cured Tobacco and Meteorogical Factors

为了研究烟叶钾含量与气象因子的关系,利用灰色关联理论结合生产实际选出与烟叶钾含量相关的平均温度、平均湿度、平均日照时数和平均降水量等4个气象因子,并建立了烟叶钾含量(因变量)与4个气象因子(自变量)之间的3D交互效应图。单因子效应分析表明,对烟叶钾含量影响的程度依次为平均温度>平均湿度>平均日照时数>平均降水量>总日照时数>≥15℃有效积温>总降水量>≥25℃有效积温>≥20℃有效积温。两因子交互效应分析表明,在一定范围内,平均气温和平均湿度、平均气温和平均日照时数、平均湿度和平均日照时数、平均湿度和平均降水量、平均日照时数和平均降水量对钾含量存在协同作用;而平均气温和平均降水量对烟叶钾含量的影响在低温和高湿情况下相互独立。这些研究结果可为利用气象因素提升烤烟烟叶元素含量提供参考。

In order to study the effect of meteorological factors on potassium content of tobacco,4 key meteorological factors,such as mean daily temperature(MDT),mean relative humidity(MRH),mean sunshine hours(MSH),and mean precipitation(MP),were screened by grey relational analysis(GRA).The 3D interaction effect diagram on the potassium content(dependent variable)and 4 meteorological factors(independent variables)was established.The results of single-factor analysis showed that the order of these factors affecting potassium content in tobacco leaves was as follows:MDT>MRH>MSH>MP>TSH(total sunshine hours)>15AT(≥15℃accumulated temperature)>TP(total precipitation)>25AT(≥25℃accumulated temperature)>20AT(≥20℃accumulated temperature).The results of two-factors interactions showed that there was synergistic effect between MDT and MRH,MDT and MSH,MRH and MSH,MRH and MP and MSH and MP on potassium content within acertain range.However,the effects of MDT and MP on potassium content were mutual independent under the high temperature and high humidity.These results could provide reference for improving the content of elements in flue-cured tobacco leaf by meteorological factors.