Study On Assessment Of Soil Magnesium Condition And Magnesium Supply Technology In Tobacco Plant Area In Jiangxi

Mg is one of the essential secondary elements of plant, which is also highly demanded by flue-cured tobacco. Mg is an important component of chlorophyll which plays an important role in plant nutrition. Mg is closely related to the growth, the yeild and the quality of flue-cured tobacoo. Soil is the main source of the nutrition in Mg plant. The enrichment and the paucity of supply is most colsely to the content of exchangeable Mg of soil,and affected by soil acility and alkalinity, ionic composition of soil, cation exchange capacity of soil. This study used the method of field experiment, which studied at the different amounts of Mg fertilizer and different forms of Mg fertilizer's impact on the growth, the yeild and the quality of flue-cured tobacoo on jiangxi tobacoo -planting soil, to guide the tobacco growers to provide a reasonable basis for application of Mg fertilizer.From the analysis result of the 198 soil sample exchangeable Mg, the content of the soil exchangeable Mg has a big change in jiangxi tobacoo-planting area. The content of soil exchangeable Mg is in the scope of 18 mg/kg -310mg/kg, the average is 55.8mg/kg. More than 60% of tobacco -planting soil exchangeable Mg content below the MG critical value ,23.04% tobacco soil exists the possibility of potential Mg deficiency, less than 12.75% of the exchangeable Mg tobacoo-planting soil for the rich .Meanwhile,the ratio of the exchangeable calcium and the Mg is also high in jiangxi tobacoo-planting soil.Nearly 60% of the exchangeable calcium and Mg ratio of the tobacco plants soil is≥10, there may be a chance calcium Mg ions of antagonist-induced Mg deficiency.The trial result shows that the different kinds and adopted quantities of Mg fertilier play a different role in the growth and quality-improving of the tabacoo, the different levels of adopting Mg evidently influence the growth of flue-cured . tobacco, but nearly not influence bearing period of flue-cured tobacco in the field . Adopting Mg fertilier can increases the accumulation of the dry substance, raises the weight of every leave and enhances the yields and qualities of tabacoo. Comprehensive considerations for the quality , the produce value and interior chemical elements under this trial condition , the Mg is adopted properly 30kg per hectare in the field, at this case , the yield of the tabacoo is the highest, the interior elements is fit comparatively, the quality of the tabacoo is better comparatively.This article gives a comprehensive description of using magnesium fertilizers on jiangxi tobacoo. To the region as a unit, we analyse the various indices of using magnesium fertilizers of jiangxi tobacoo and to discuss the overall situation of using magnesium fertilizers and we put forward the balance fertilization technology and the using of magnesium fertilizers technology of jiangxi tobacoo.Through the description of the condition of adopting Mg fertilier in the Jiangxi tobacoo and the comparision with the different tabacoo areas, the result diaplays that adopting Mg fertilier in the Jiangxi province takes on a developmental trend that the Mg is adopted properly , the quality of Mg is improving gradually , the structure of it is sensible in some sense and the system is improving little by little; through adopting Mg fertilier in the Jiangxi province, the productivity of the soil and the quality of the tobacoo have a prominent change and improvement . Compared with the trial conditions of adopting Mg fertilier in different tobacoo areas in the methods of variance analysis and canonical correlation analysis, by analysizing the currently overall condition of adopting Mg fertilizer in Jiaxi province, the results show that we may know the correlation coefficent of tabacoo and its economical value is high and evident by canonical correlation analyses of tabacoo relative index and tabacoo economical index. According to the analysis results , it indicates the different adopted quantities and kinds of Mg fertilizer influence the quality and interior quality levels of tabacoo to great extent .