Studies On The Cultural Technology Of K-incressing And Cl-reducing Of Flue-cured Tobacco

On the basis of Luohe tobacco-growing areas as the foundation,combined with different transplanting ways of potassium and chlorine content of tobacco leaf,respectively on the chlorine content and field agronomic traits of tobacco seedlings Zhangen transplanting tobacco potassium content and different mulching transplanting,routine chemical components and p Hysical properties.The result are as follows.1 Effect of tobacco seedling transplanting Zhangen on potassium content and quality of flue-cured tobacco in LuoheDifferent dip root transplanting treatment had a non-significant effects on Agronomic Traits of different growth period of flue-cured tobacco in the field,but dip root on Agronomic Characters of flue cured tobacco field processing is generally higher than the control treatment,which showed that transplanting root dip taking fertilizer synergistic agent could improve the activity of soil,promote the absorption of nutrients of tobacco and benefit for the growth of the tobacco plants.Baked sample p Hysical traits: indexes were better than the control treatment after root dip,while the weight of leaf and stem content showed an opposite consequence.The appearance quality after Baking: dipping the roots in processing tobacco flue-cured Leaf Tobacco Maturity better,and more fully,orange tobacco accounts for the proportion to be high,leaf structure and identity are suitable.Tobacco chemical composition:dip root treatment nicotine and chlorine content were reduced to 15% compared with the control treatment,and three parts of tobacco leaf potassium content were increased by 14%,27% and 9% compared with the control treatments,respectively.But the ratio of total sugar to nicotine and total nitrogen to nicotine is not high,tobacco taste and stimulus has certain influence,which carbohydrate conversion is not sufficient and soil nitrogen content enriched,dipping the roots in processing tobacco chemical composition more coordination,and high-quality tobacco leaf chemical component contents in closest.2 Effects of different covering methods on Luohe chlorine content and quality of flue-cured tobacco.In the field of agronomic traits,the index difference between treatments was significant,which mainly contained the dynamic change regulation of pre coated soil moisture and temperature,the agronomic traits of different treatments in different growth period in both early mulching,uncovering film mulching on the ridge after the best,the former "after the film" straw mulching cultivation,can maintain good water conditions in different stages of tobacco growth,in the early growth stage by mulching significantly improve the soil temperature,in the middle and late stage by removing film,soil and straw mulching,reduce surface evaporation,soil water conservation,earth makes a lot of adventitious root proliferation of tobacco,which is conducive to the absorption and coordination on soil nutrients.In addition,straw mulching could inhibit the growth of weeds,reduce the destruction of soil structure,enhance the permeability of soil,organic matter gradually decomposition and mineralization is conducive to the enhancement of the biological activity of soil,increase soil potassium input;soil temperature and surface evaporation decreased also inhibited the soil free of chloride ions in the soil of to topsoil soil aggregation,thereby reducing the tobacco absorption of chloride ion.On the p Hysical properties,among the treatments have significant differences,in different parts of tobacco leaves,tobacco leaves of each treatment in the overall trend for The plastic film mulching,uncovering film mulching on ridge after>The whole growth period of straw mulching on the ridge>The local customs,when transplanting implement ridge mulching(30 days after Film Uncovering)>Do not cover the bare land.This also in a certain extent confirms the difference in agronomic traits,indicating that the late straw cover had an obvious role in promoting the growth of tobacco,Tobacco Maturity better,the p Hysical properties is also better.In different periods of tobacco wrapped like chemical composition results showed that throughout the four different periods,with the growth of the tobacco plant,the nicotine content variation trend is first decreased after increasing.Total sugar and reducing sugar content in 30 days after transplanting declined slightly,then began to rise and to the plastic film mulching,uncovering film mulching on ridge after content is close to the content of high quality tobacco.The potassium content has gradually increased,to 75 days after transplanting to decrease.Chlorine content in about 45 days after transplanting to be the highest,and then slowly began to reduce,reduce the rate of the plastic film mulching,uncovering film mulching on ridge after,the local customs,when transplanting implement ridge mulching(30 days after Film Uncovering)is bigger,which indicates that the late straw mulching on has obvious effect to reduce absorption of chlorine content.Chemical composition:"after film straw shoe cover cultivation methods for soil C / N ratio adjustment,increased organic matter and biological activity,chemical composition of tobacco leaves more coordinated,the nicotine content close to high-quality tobacco nicotine content,chlorine content was significantly lower than that of the whole growth period covered and uncovered cultivation,potassium content to the plastic film mulching,uncovering film mulching on ridge after was significantly higher than other treatments,which increased by 15% or more compared with the control treatment.Changes of total nitrogen content to total nitrogen were close to the content of tobacco.