The Effects Of Different Altitudes On Growth And Quality Of Cured-tobacco

One variety of tobacco K326 was used as studying objects in the study, the influence of eight different altitudes on agricultural characters, economic characters and the chemical composition of tobacco leaves were revealed.The results are as follows:1. Altitude affect five agronomic traits of these seven flue-cured tobacco including plant height, stem circumference, leaves, maximum leaf length and maximum leaf width. It shows that the plant height and stem circumstance of these seven flue-cured tobacco were shorter and thinner as increasing with altitude. And the plant height and stem circumference of there flue-cured tobacco shows significant negative and positive linear correlation with altitude, respectively. These two results were the same as the results of previous studies. However, the leaves, maximum leaf length and maximum leaf width of these three traits of seven flue-cured tobacco did not shows a certain regularity as altitude increasing, and it did not show a significant linear relationship with altitude.2. Altitude affect four economic traits of these seven flue-cured tobacco including yield, value, the proportion of superior and the proportion of upper-middle. It shows that the value, the proportion of superior and the proportion of upper-middle of these seven flue-cured tobacco were raised as increasing with altitude. And these three traits show significant positive linear correlation with altitude, respectively. Only the yield did not show a certain regularity as altitude increasing, regularity is not obvious. Stability analysis for yield of these seven flue-cured tobacco shows that Guiyan No.4 and Nanjiang No.3 are more stability than other five. Guiyan No.4 and Nanjiang No.3 show less sensitivity as altitude increasing.3. Altitude affect five routine chemical components of these seven flue-cured tobacco including total Sugar, reducing Sugar, Nicotine, Potassium and Petroleum ether extract. It shows that the total sugar, reducing sugar and petroleum ether extract of these seven flue-cured tobacco were raised as increasing with altitude, and these three traits of most varieties show significant positive linear correlation with altitude. Nicotine of these seven flue-cured tobacco were reduced as increasing with altitude, and Nicotine of most varieties show significant negative linear correlation with altitude. The Potassium did not show regularity with altitude.