广元市植烟土壤养分与其烟叶品质的灰色关联分析

摘要

In order to study the influence of tobacco soil nutrient status on tobacco leaves quality,grey correlative degree analysis was applied to determine the relationship between soil nutrient status and tobacco quality characters taking middle leaves of Yunyan 85 and the soil as material.Results:1) soil nutrient status had more influence on inherent chemical quality,appearance quality and comprehensive quality than sensory evaluation quality.2) Exchangeable Mg,available P,available K,available Mn and pH had great impact on inherent chemical quality and the correlative degree was 0.744 6,0.738 2,0.737 0,0.717 6 and 0.713 7 respectively; Appearance quality was mostly influenced by OM,exchangeable Mg,exchangeable Ca,available P and available K,with the correlative degree of 0.753 7,0.748 3,0.732 0,0.702 0 and 0.699 3 separately; And the comprehensive quality was severely influenced by exchangeable Mg,available K,chloridion,available Mn and pH,the correlative degree was 0.762 2,0.741 6,0.724 3,0.718 6 and 0.7139 respectively.3) The soil nutrient factors influencing tobacco quality were mainly exchangeable Mg,available K,available P,available Mn and pH,available Mg had the greatest influence.Consequently,in Guangyuan tobacco grown area,the quality of cured tobacco leaves could be improved by increasing the application amount of exchangeable Mg,available P,available K and controlling the fertilizing level of exchangeable Ca to adjust soil pH,so as to enhance local tobacco quality.%为了探明广元市种植烟草土壤的养分状况及其对烟叶品质的影响,以云烟85初烤中部烟叶和种植烤烟田块的土样为材料,采用灰色系统关联方法分析了土壤养分状况与烟叶品质的关联度.结果表明:1)土壤养分状况对烟叶的内在化学品质、外观质量及综合品质的影响较大,对感官评吸质量的影响较小.2)土壤养分因子中对烟叶内在化学品质影响较大的有交换性镁、速效磷、速效钾、有效锰和pH,其关联度分别为0.744 6、0.738 2、0.737 0、0.717 6和0.713 7；对烟叶外观质量影响较大的有有机质、交换性镁、交换性钙、速效磷和速效钾,其关联度分别为0.753 7、0.748 3、0.732 0、0.702 0和0.699 3；对烟叶综合品质影响较大的有交换性镁、速效钾、氯离子、有效锰和pH,其关联度分别为0.762 2、0.741 6、0.724 3、0.718 6和0.713 9.3)影响广元市烤烟品质的土壤养分因子主要有交换性镁、速效钾、速效磷、有效锰和pH,并以交换性镁的影响最大.因此,在广元市烟草种植区可通过增加交换性镁、速效磷、速效钾和控制交换性钙施用量调节土壤的酸碱度,提高当地烟叶品质.