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Suitable ridge height was studied in this paper in Wenshan. Effects of ridge height on temperature, moisture, physical and chemical properties of soil, effects of research ridge height earth on flue-cured tobacco growth, yield and quality, effects of increasing potassium fertilizer and graded layered application on tobacco growth and yield and quality of flue-cured tobacco, effects of different ridge measures on production costs and economic benefits have been studied. The main results are as follows:(1) In the case of low rainfall early, reduced the ridge body height could improve significantly the rhizosphere soil moisture and conducive to the growth and development of rejuvenation and tobacco plants. When increased rainfall Late, after the second treatment, the ridges are heightening which could make the drainage field and improve the growth of flue-cured tobacco.(2) When the higher ridges leaching of nitrogen and potassium were increased, secondary earth could reduce leaching of nitrogen and potassium and increase the absorption of nitrogen and potassium for tobacco plant. The graded and earth layer layered potassium could reduce potassium leaching and improve nutrient availability.(3)Secondary earth could improve the single leaf weight of middle leaves, reduce stem ratio tobacco. improve leaf thickness of the lower leaves and middle leaves, equilibrium moisture content of the tobacco, quality of lower tobacco leaf. In the case of a certain amount of potassium, frequency of increased potassium application and potassium supply in the late could improve significantly the middle leaves single leaf weight, increase the lower leaves and the thickness of the middle leaves, equilibrium moisture content of the tobacco, leaf quality of lower and middle leaves, reduce stem ratio of flue-cured tobacco.(4)Lower ridge height can increase the content of total sugar, reducing sugar and potassium of flue-cured tobacco, the ratio sugar to nicotine, the ratio total nitrogen to nicotine, the ratio potassium to chloride of the middle and upper leaves, reduce starch content, which made the chemical composition of tobacco more coordinated.(5) Secondary earth could increase the content of total sugar, reducing sugar and potassium, nicotine of lower leaves, the ratio sugar to nicotine in the middle leaves, the ratio potassium to chloride, reduce the content of starch, ratio of total nitrogen to nicotine of lower leaves. In the amount of potassium in certain circumstances, frequency of increased potassium application and potassium supply in the late could increase the content of total sugar and reducing sugar, reduce the starch content and nicotine content, the total nitrogen content of the lower and middle leaves, improve significantly potassium content of the middle and upper, the ratio sugar to nicotine, improve the ratio of nitrogen to nicotine of the upper leaves, increase significantly the ratio potassium to chloride in the upper leaves.(6) Labor of flat land planted tobacco earth was less than conventional operations to2.5, mulch the ground165.3to170.4yuan. The cost of labor of secondary earth every667square meters were more than the regular employment to0.3, low ridge once earth than conventional economical employment of0.9man-days per667square meters,64.2to67.6yuan, saving the cost of labor and mulch; low ridge secondary earth than conventional per667square meters more than1.9man-days, and save the cost of plastic film offset after about more than100.4to113.8yuan.(7) Compared flat transplanting, low ridge transplanting could increase the average price and value, to a certain extent to improve the proportion of secondary smoke. Secondary earth have had a certain role to improve the proportion of secondary smoke, could improve significantly the average price and output value. In the same amount of potassium, increase potassium supplication in the late could increase the average price of0.53yuan per667square meters increase the value of89.15yuan.
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