| Improving the potassium content of flue-cured tobacco leaves is a important content of high quality tobacco in middle Henan province cultivation techniques.As the potassium content of flue-cured tobacco is in low status leaves, we use potassium sulfate and potassium fulvic two species potash fertilizer unchanged overall, three basic recovery ratio of 1:0, 4:6 and 4:3:3 and no potassium fertilizer control,a total of seven treatment.The experiment was taken in Xuchang Xiangcheng County, analyze each processing of tobacco soil nutrients and quality of tobacco leaf after bake on, and Luzhou tobacco Variety Yuyan 10, potassium accumulation model was set up to analyze its potassium accumulation characteristics, understand the absorption of flue-cured tobacco under different potassium treatment law, in order to improve the potassium content of tobacco, provide a theoretical basis to improve the quality of tobacco leaves. Preliminary following results were obtained: 1. Effect of different treatments on tobacco soil nutrientsThe results show that, compared with the control, organic matter, available phosphorus, potassium and nitrogen content in soil were increased by adding fulvic and potassium. When cured tobacco maturity, administered three times fulvic can significant increase soil organic matter, available phosphorus and potassium. compared with the control, respectively increase 15.51%, 25.81%, 23.11%. Compared with the control, rosette stage and prosperous long-term, the content of nitrogen were increased by 23.75%, 22.08%. When maturity stage, the content of organic matter, available potassium and phosphorus have increased, and the vailable potassium and phosphorus contents were significantly higher than control, were increased by a 17.32%, 20.45%. When rosette stage and prosperous long-term, the content of nitrogen in soil could be significantly improved by adding fulvic, and compared with the control increased by 12.63%,16.67%. Description administering fulvic potassium better than flue-cured tobacco grown in the early promotion of nitrogen, organic matter, increasing soil available phosphorus and potassium content of tobacco for which nutrient absorption "pre little more late," the law of phase consistent, more conducive to tobacco growth and quality optimization. Fulvic improves soil properties, increase the biological activity of the soil, which is conducive to the effective use of release and tobacco plant mineral nutarition of soil nutrients, and to be administered three times better. 2. Different Treatments on Potassium Accumulation of tobaccoTwo potash increases application performance to increase both the number of the leaf accumulation of potassium, accumulation of leaves fulvic potassium which were processed 2.91 g m-2, 3.20 g m-2 and 4.13 g m- 2, SOP respectively 2.32 g m-2, 2.39 g m-2 and 2.49 g m-2 were higher than the control, enhance the effect of fulvic obvious, potash administered a few times so that the soil planting tobacco, especially rhizosphere soil potassium levels remain high, conducive to the accumulation of potassium in tobacco. K blade accumulation rate from the point of view, in the same type of situation potash, potassium accumulation at the leaves appear three times the performance of all facilities into supplemental ratio 4:3:3 of the closest maturity process, the maximum accumulation rate; while at the same mode of administration, fulvic process than K2SO4 treatment can significantly increase the maximum accumulation rate of tobacco potassium, thereby increasing the amount of potassium accumulation. Meanwhile, the administration of fulvic can significantly increase the accumulation of roots and leaves of tobacco plants the proportion of potassium, reducing the proportion of the stem, to optimize the distribution of potassium in tobacco plant tissues can promote. 3. Different treatment on chemical components of tobaccoFulvic process to some extent, improve the ratio of upper leaves of two sugar, tobacco and taste improvement, but no significant differences between different modes of administration. Potassium content in tobacco leaves after baking, the upper leaves, the potash significantly increased potassium content of tobacco leaf in the same proportion based recovery, fulvic better than K2SO4; two potash were based recovery ratio of 4:3: 3 to lift the maximum upper leaves. CK middle leaf also showed the lowest levels of potassium, fulvic T4 treatment was the highest potassium content, while the best performing K2SO4 treatment for T1; potash application under consistent manner, the fulvic on K enhanced content better than K2SO4. In the lower leaves, deletion did not affect potassium potassium content of tobacco, the two types of potash, potassium fulvic mention the effect is still better than K2SO4; potash application times on the potassium content lower leaves no significant improvement. 4. Different Treatments Aroma constituents of tobacco neutralThe results show that, compared with not applying potassium fertilizer, potassium sulfate may promote bake in upper leaves after Browning degradation products and increase solanone, while the central tobacco phenylalanine degradation products, carotenoids degradation products and neophytadiene content decreased, each treatment to T5 the best, where middle leaves brown degradation products, solanone contents were increased by a 20.30%, 17.95%, upper leaves were increased by a 36.61%, 27.34%, while the administration of fulvic can effectively promote the degradation products of upper leaves brown, solanone, neophytadiene carotenoid degradation products and increase the total content of aroma, which T6 best middle leaves brown degradation products, solanone, neophytadiene carotenoid degradation products increase the total content and aroma were increased by a 26.08%, 66.17%, 14.87%, 19.01 %, 16.02%, upper leaves were increased by a 43.44%, 68.94%, 44.10%, 45.84%, 37.35%, indicating that administration of fulvic promote more effective than potassium contents of aroma increased tobacco substance. |
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