Effects Of Different Harvesting And Curing Process On The Characters And Economic Efficiency Of Upper Leaves Of Tobacco

With the upper five leaves of flued-cured tobacco variety G80 as materials, the effects of different harvest ways and curing crafts on the quality and economic benefit of tobacco leaves were studied. Exploring the appropriate harvesting and curing methods for upper leaf of tobacco. To make improvements for the three-phase curing processing and research the effects of extending the period of yellowing and color-fixing on the quality and energy consumption of the upper tobacco.The results showed that:among the three harvest ways in the study, the appearance quality of the one-time harvesting ways with stalk or not are generally higher than that of those through conventional harvest way, and upper leaves that harvest through one-time harvest way with or without stalk increase the production 59.51 Yuan and 7.15 Yuan separately. And improve the average price 1.22 Yuan and 0.55 Yuan separately, The single-leaf-weight reduced 0.41g and 0.58g on average, the chemical composition of the tobacco leaves are more coordinated than that through the conventional harvest way. But one-time harvest way with stalk needs higher costs of labor, so its overall economic benefit is lower, compared with the conventional harvest way.The tobacco leaves cured with improved baking technique has more coordinated chemical composition, reducing sugar content increased by 6%, starch content reduced by 4.62%and potassium to chlorinum ratio increased by 2.59%; it has obviously improved appearance quality, open leaf structure, medium body, more orange tobacco leaves and green leaf proportion reduced by 3.1%; the superior tobacco leaf proportion of the upper leaves is increased by 15.25%, with average price increased by 0.75 Yuan per kilogram; however, the energy consumption cost is slightly increased.Upper leaf tobacco use to pull a long yellow later and later in the heat of the model pattern of quality tobacco cook a large margin, and loose structure, improve the status and moderate, oil and tobacco a large proportion of an orange color, especially in the upper leaf tobacco purchased in the structure, performance, the more obvious in the great proportion of tobacco smoke 15.25 percentage points raised by the proportion of smoke 2.59 percentage points, and the proportion of 3.1 percentage points. The average price is a regular pattern CK the high 0.75 yuan kg and a kilogram cigarettes net benefits0.55. But a high cost of energy consumption of energy consumption in the high as 0.20.This research prove:upper leaf adopted without a stem harvesting way, is baking in the extended appropriately yellow late (42℃) and color of the late (54℃) time of the modulation (12h), and the conventional model (CK) and stems harvesting way, can dramatically improve the appearance of the tobacco and physical properties. After the operation of the chemical composition of the coordination and the upper foliage of alkali content and thiCKness, increasing in the upper foliage of material and petroleum ether extract oil content and improving the smell of tobacco have improved economic performance and promote energy reduction.