Effects On Growth And Development And Yeilded And Quality At Different Magnesium Fertilizer Variety And Amount In Tobacco

This research carries on in April to August, 2008 at the Research Center of Tobacco and Health, University of Science and Technology of China.Simultaneously, carries on the field experiment in Zhuangli village.Has studied the tobacco shape and the physiological target,and chemistry quality and armoa quality under the different magnesium fertilizer variety and the amount used.Study result as follows:1. The employment potential of hydrogen different magnesium fertilizer variety will have the different influence to soil pH,employ magnesium sulfate's soil acidity is highest.Along with alkalinity magnesium fertilizer dolomite powder employment quantity increase, the soil pH assumes the trend of escalation. But the magnesia regarding plants in the soil the pH change not to affect nearly.2. Employment the magnesium sulfate and the magnesia may enhance the soil exchangeable magnesium content rapidly. The dolomite powder enhances the soil exchangeable magnesium content speed to be slightly slow. the soil exchangeable magnesium content's enhancement's of three kinds of magnesium fertilizers tend to be consistent. Moreover, the more magnesium fertilizer amount used,the more soil exchangeable magnesium content.3. The middle and the massive dolomite powder may obviously improve the tobacco growth condition,reduce the magnesium deficientioncy , enhance the the chlorophyll content and disease resistance. Enhances the output and the output value of tobacco. And use the middle quantity dolomite powder's effect is best, use 100kg/667m~2 the output and the output value respectively achieves 218.0 kg/667m~2 and 2462.5 Yuan /667m~2.4. Enhances the magnesium fertilizer employment quantity can enhance the nicotine content at low part leaf . Although has influence on middle and upper part leaf but does not have certain regularity. Not has certain influence on total nitrogen content in tobacco leaf. Employs the few dolomite powder can enhance the reducing sugar content,.Employs most amount of magnesium fertilizer processing sugar nicotine ratios are most reasonable.5. Employs the most amount of magnesium fertilizer make the highest magnesium content in tobacco. Does not employ the magnesium fertilizer make the lowest magnesium content in tobacco. The upper, middle and lower three spot magnesium element content's distributed rule is even : upper>middle>lower. To be opposite with does not lack the magnesium distributed situation. Does not employ the magnesium fertilizer make the calcium - magnesium ratio not to be balanced seriously.,employ the most magnesium fertilizer make the calcium - magnesium ratio at the suitable level. The influence on the magnesium fertilizer employment on the chlorine and iron, manganese, copper, zinc content's is not big.6. Employs 50kg/667m~2 the dolomite powder to be possible to raise the leaf tobacco acidic aroma ingredient content, the dolomite powder employment quantity surpasses 50kg/667m~2 will not to get up the effect. The employment magnesium fertilizer can cause the leaf tobacco alkalinity aroma ingredient content reduction. Employs when the 50kg/667m~2 dolomite powder, the tobacco neutral aroma ingredient content is highest. Employs 100kg/667m~2 dolomite powder ,the content to be lowest. Employs the 50kg/667m~2 dolomite powder to be possible to enhance the leaf tobacco fragrance ingredient total content obviously, but the amount used surpasses time 50kg/667m~2 not has effect.7. In the middle employment of the dolomite powder may enhance the armoa makings ,and enhance the armoa passes sends the nature, reduces the dry feeling, improve the pleasant after-impression.8. In the Nadan part to plant the flue-cured tobacco, each 667m~2 area employs the 50~100kg dolomite powder to be more appropriate, the magnesia and the magnesium sulfate ill should the use.