To Research The Chemical Quality Of Flue-cured Tobacco In Sichuan

Based on five tobacco planting cities in sichuan province,the objective weight of tobacco chemical indicators was calculated by using the grey relational degree weighting method.On this basis,the comprehensive quality of flue-cured tobacco was studied and positioned by using the attribute recognition model,so as to judge the coordination and comprehensive coordination of the chemical components of flue-cured tobacco in different areas,varieties and parts.The main research conclusions are as follows:(1)the coordination of total sugar,reducing sugar,total nicotine,chlorine and potassium of tobacco leaves in liangshan tobacco region is in the general level,the ratio of sugar to alkali,total nitrogen and starch is in the coordination level,and the ratio of potassium to chlorine is in the coordination level;The coordination of the chemical components of potassium,total sugar,reducing sugar and total nicotine in panzhihua tobacco region is in the general level,and the coordination of potassium to chlorine ratio,starch,saccharine to alkali ratio and chlorination chemical components is in the coordination level.In luzhou tobacco area,the coordination of potassium chlorine ratio and total nitrogen chemical components was in the coordination level,the coordination of total sugar index chemical components was in the coordination level,the coordination of total nicotine chemical components was in the low coordination level,and the coordination of nitrogen and alkali chemical components was in the low coordination level.In yibin tobacco region,the coordination of chemical indexes of potassium and chlorine in tobacco leaves was at the coordination level,the coordination of chemical indexes of total sugar,potassium and total nitrogen was at the coordination level,the coordination of chemical indexes of reducing sugar,total nicotine and starch was at the general level,and the coordination of chemical indexes of chlorine and nitrogen to alkali was at the uncoordinated level.The chemical index of tobacco leaf chlorine in guangyuan tobacco area was in the coordination level,the total nitrogen,starch and total sugar were in the coordination level,the ratio of potassium,potassium to chlorine,reducing sugar,total nicotine and saccharine were in the general level,and the ratio of nitrogen to alkali was in the uncoordination level.The comprehensive ranking of chemical quality of flue-cured tobacco in sichuan tobacco region is: luzhou >yibin >panzhihua >liangshan >guangyuan.(2)in terms of varieties,the chemical quality coordination of tobacco 87 was better,while that of safflower daijinyuan was worse.Hongda,yunyan 85,yunyan 87 leaf chemical quality in the general level;The chemical quality of the upper part of sichuan flue-cured tobacco was >.The chemical quality coordination of the upper part of sichuan flue-cured tobacco belongs to the grade of coordination.The coordination of chemical quality of tobacco leaves in central sichuan flue-cured tobacco belongs to general grade.(3)the correlation coefficient between altitude,sunshine duration,annual rainfall and chemical quality of flue-cured tobacco is less than zero.Such meteorological indicators have an inhibitory effect on the chemical quality of flue-cured tobacco,and the correlation coefficient between the average annual temperature and the chemical quality of flue-cured tobacco is greater than zero.Such meteorological indicators have a promoting effect on the chemical quality of flue-cured tobacco.Soil organic matter,total nitrogen,alkali solution nitrogen,rapidly-available potassium content and quality of flue-cured tobacco chemistry between the correlation coefficient is greater than zero,chlorine,soil total phosphorus,available phosphorus,total potassium content and quality of flue-cured tobacco chemistry between the correlation coefficient is less than zero,therefore,the indexes of soil organic matter,total nitrogen content of flue-cured tobacco chemistry plays a role of promoting quality,chlorine,total phosphorus,soil quality of flue-cured tobacco chemical inhibition.