The Research Of Flue Cured Tobacco’s Current Situation And Problem In Panzhihua’s Main Tobacco-growing Area

We investigated the planting environent and production management by field investigation and SPSS for finding out the influence factors of flue cured tobacco,for example,varieties,soil,field,fertilization,plant diseases and insect pests.Then we learned the present situation of varieties,soil,field,fertilization, preceding crop,plant diseases and insect pests for the basis of planting division and flue-cured tobacco production.The results showed that:(1)Single structure variety,few high quality varieties and most of yun tobacoo which were not good for the stable of tobacoo varieties.Putting forward the following measures:Improving the" Hongda" scale of planting more than35%,reducing " the planting proportion of Yunyan85and87,these two species total planting proportion control in60%, which a single variety ratio should not exceed to50%.(2)The red soil is the mainly soil in the Panzhihua that is no good permeability and nutrient conditions which are not conducive to good quality flue-cured tobacco growth.We consider applying organic fertilizer to improving soil.From the field,lew good field that is not conducive to preventing the wanter and nutrient for the growth of Flue-cured Tobacco.We should pay more attention to improve the soil by the organic fertilizer and ensure the normal use of fertilizers.(3)Panzhihua applying base manure for tobacco was special compound fertilizer that Miyi was acres of fertilizer46kg and Renhe was acres of fertilizer44kg.Many tobacco farmers applied fertilizer for their experiences about acres of fertilizer50kg that wasted a lot of fertilizer. Additional fertilizer was no obvious difference in Miyi and Renhe.Looking from the application of organic fertilizer,Miyi and Renhe were not to reach acres of farmyard manure400kg,straw reaching to84kg in Miyi and48kg in Renhe, seed cake fertilizer reaching to5.3kg in Miyi and7.6kg in Renhe.Therefore we suggest that we should promote the fertilization technique and strengthen technical guidance.(4) A part of tobacco farmers were not aware the importance of the crop rotation,and a lot of tobacco field were planting tobacco many years for the single preceding crop,which effect the economic benefits.According to the situation,we found strictosidine and pea as the crop rotation that could prevent plant diseases and insect pests and raise economic benefits.In addition,planting green manure as the crop rotation could improve the soil.Green manure and preceding crop should reach to80%.(5)Improper field management didn’t improve the present status of plant diseases and insect pests.Single species,continuous cropping and preceding crop led to the occurrence of plant diseases and insect pests.So we propose comprehensive measures that contain chemical,biology and forecasting to prevent and control plant diseases and insect pests.