Effect Of Different Organic Fertilizers On Growth Of Flue-cured Tobacco

In Yunnan province , organic fertilizer has always been applying on flue-cured tobacco practice,. Especially in the recent years, the number of applying organic fertilizer in the field has being increasing ,and the range of applying organic fertilizer has being widen ,there are different experiment results of applying organic fertilizer on tobacco growth ,and lead to having various effect on qualities and yield of tobacco leaves, so there are not a science and definitely direction how to apply organic fertilizer in practice. To improve the standardization of applying organic fertilizer, to increase soil fertilize and to inhence tobacco leaf quality, and to promote tobacco sustainable development, the effect of different organic fertilizer on tobacco growth and development was studied ,the purpose is to suggest how to apply reasonablly fertilizer in flue-cured tobacco practice, the main results were as follows:1.According to the research on the effect of different amount of cake fertilizer on flue-cured tobacco growth and tobacco leafs quality, the yield, quality, average price, proportion of high and middle grades cured leaves were increase in low level nitrogen of organic fertilizer soil where cake fertilizer were used. The reducing sugar and nicotine of cured leaves under different content of applying cake fertilizer were lower than using chemical fertilizer, and using cake fertilizer made content of K and P increased. A quantity use of cake fertilizer was benefit to increasing quality of smoking, while decreasing it when using in soil with high level nitrogen of organic and available nitrogen2.According to the research on the effect of matured cake fertilizer on tobacco leafs quality, applying cake fertilizer with mature time of 20～40 days and chemical fertilizer can increase the providing intensity of soil nitrogen. Applying cake fertilizer with mature time of 20～30 days can effectively increase providing intensity of P. And applying cake fertilizer and chemical fertilizer can increase providing intensity of K. cake fertilizer with mature time of 40 days was good for increasing plant height, width and leaf area. The weight of dry matter under using cake fertilizer was higher than chemical fertilizer in 60 days and 80 days after transplant. A well ratio of cake fertilizer and chemical fertilizer can increase yield, average price and quality of cured-leaves. Fertilizing different kind of maturing cake fertilizer affect content of total sugar and reducing sugar, can benefit the absorption of plant ,which increase total nitrogen, can increase the content of K, the ratio between sugar and nicotine. Therefore, it made chemic content of cured leaves harmonize3. According to the research on the effect of organic-inorganic mixed fertilizer on tobacco growth and leafs quality, organic-inorganic mixed fertilizer had non-obvious effects on growing period, the length, width, leaf area, plant height and total number of leaves. And using 75 g per plant is best of all, in which the proportion of high and middle grades cured leaves more than CK(42.65%) for 4.62%, the yield was more than CK(132.5kg/666.7 m~2) for 26.79%. Fertilizing organic-inorganic mixed fertilizer was better than chemical fertilizer in physiological. Strength, lingering. Odor, offensive odor, after-taste and harmony, which reflected that the organic fertilizer has an obvious ability of improving tobacco leaves quality.4. According to the research on the effect of different organic fertilizer on tobacco growth and leafs quality, it had non-obvious effects within different organic fertilizer. Fertilizing oil cake is good for growth of tobacco, yield, quality. And Fertilizing decayed farm manure can decrease content of chlorophyll. The effect on chemic content including upper leaves, ratio between nitrogen and nicotine was also non-obvious. The content of total nitrogen and nicotine under fertilizing decayed farm manure was higher than fertilizing stem and CK. The content of K ,total sugar and reducing sugar followed the order of fertilizing oil cake> CK> fertilizing stem > fertilizing decayed farm manure. The effect on chemic content of central leaf is non-obvious. The content of total nitrogen and nicotine under fertilizing chemical fertilizer (CK) was highest, and other fertilizer had none difference. The content of total sugar and reducing sugar under fertilizing decayed farm manure was highest, and other fertilizer had none difference. The content of K and petroleum ether under fertilizing stem and oil cake were higher, and the content of involatile acids under fertilizing CK and oil cake were higher. There was obvious difference of leaves chemical content in the bottom leaf. The content of total nitrogen and nicotine under fertilizing oil cake and stem were higher. The content of total sugar and reducing sugar under fertilizing CK was highest, and other fertilizer had none difference. The content of K follow the order of fertilizing stem > fertilizing decayed farm manure > fertilizing oil cake>CK. Fertilizing decayed farm manure using 1000kg per mu is benefit to chemical content balance. Fertilizing organic fertilizer have stressed effect on middle leaves, and the total quality of smoking followed the order of fertilizing decayed farm manure > fertilizing stem >CK> fertilizing oil cake.