CN104256880A - Quantitative evaluation method for easy-to-cure property of flue-cured tobacco - Google Patents

Abstract

The invention discloses a quantitative evaluation method for the easy-to-cure property of flue-cured tobacco. The quantitative evaluation method comprises the following steps: loading fresh tobacco leaves which are normally ripe in different qualities into an electrothermal type humiture self-controlled tobacco curing box at the density of 70kg/m<-3> and curing the fresh tobacco leaves according to a three-segment curing process; judging the easy-to-cure property of the tobacco leaves according to the ratio of carotenoid and chlorophyll in the last stage of yellowing during tobacco curing, wherein the judgment conditions are as follows: when the ratio of carotenoid and chlorophyll at the upper parts and the lower parts of leaves is more than 1.50, and the ratio of carotenoid and chlorophyll of the middle parts of the leaves is more than 2.30, the easy-to-cure property of the flue-cured tobacco leaves is relatively good; when the ratio of carotenoid and chlorophyll at the upper parts and the lower parts of leaves is 1.00-1.50 and the ratio of carotenoid and chlorophyll of the middle parts of the leaves is 2.00-2.30, the easy-to-cure property of the flue-cured tobacco leaves is medium; and when the ratio of carotenoid and chlorophyll at the upper parts and the lower parts of leaves is less than 1.00, and the ratio of carotenoid and chlorophyll of the middle parts of the leaves is less than 2.00, the easy-to-cure property of the flue-cured tobacco leaves is relatively bad. The quantitative evaluation method utilizes the relationship between the activity of polyphenol oxidase and the curing quality of tobacco leaves to evaluate the curing resistance of the tobacco leaves, is high in accuracy and good in repeatability, and reduces the experience demand on technical personnel.

Description

The method for quantitatively evaluating of property easily baked by a kind of flue-cured tobacco

Technical field

The present invention relates to the method for quantitatively evaluating that property easily baked by a kind of flue-cured tobacco, belong to flue-cured tobacco modulation field.

Background technology

The baking property of tobacco leaf refers to what tobacco leaf obtained in agronomy process, self intrinsic quality feature that whether easy the flavescence shown in bake process, dehydration, fixation, blackening etc. are.Tobacco flue-curing characteristic can describe by " easily roasting property " and " resistance to roasting property "." easily roasting property " main reflection tobacco leaf turns yellow in bake process, dewater, fast, slow, difficult, the easy characteristic of fixation.Usually required not bery strict in bake process to temperature, damp condition, be easy to turn yellow, more easily dewater, color and luster is also easy to fixing fresh cigarette and is described to easily roasting, otherwise then not easily bake.

In current production, evaluation method flue-cured tobacco easily being baked to property mainly contains two kinds, and one judges baking property according to tobacco leaf quality, tobacco leaf quality is not soft, good springiness, breakable, easily toasts, this mode is main mainly with sense organ and micro-judgment, generally, more not easy to operate; Another kind of mode is that the situation of change according to tobacco leaf in bake process judges baking property, as blade tip first turns yellow, progressively to phyllopodium and master pulse expansion, and the tobacco leaf that flavescence speed is moderate, easily roasting property is good; Spot film is first yellow, expands gradually, first yellow blade face, rear yellow blade back, the tobacco leaf that flavescence speed is slightly slow, illustrates that easily roasting property is slightly poor; Turned yellow slow or phyllopodium first Huang, and the black sudden and violent leaf of many genus or shade leaf, easily roasting property is poor.As provided in Authorization Notice No. CN 102172296 B method for determining flue-curing property of flue-cured tobacco: decision condition is as follows: be 48 ~ 60h when the lower tobacco leaf time that turns yellow, middle and upper part tobacco leaf turns yellow the time when being about 72h, and easily roasting property is good to show tobacco leaf; Be more than 72h when the lower tobacco leaf browning time, the middle part tobacco leaf browning time is more than 120h, and the upper tobacco leaf browning time is more than 60h, shows that the resistance to roasting property of tobacco leaf is better.This kind of mode gives by time and color as the standard judged, some quantizating index that this case then reacts baking of flue-cured tobacco characteristic evaluate tobacco flue-curing characteristic.

Summary of the invention

The object of the invention is to solve deficiency of the prior art, provide a kind of flue-cured tobacco easily to bake the method for quantitatively evaluating of property.

To achieve these goals, the technical solution adopted is in the present invention: the method for quantitatively evaluating of property easily baked by a kind of flue-cured tobacco, and step is as follows:

The first step: be loaded on by the fresh tobacco leaf of different quality normal mature in electrothermal humiture automatic control flue-cured tobacco case, smoke filling density is 70 kgm ^-3, toast according to three-phase-drying for tobacco technique;

Second step: according to later yellowing stage carotenoid in Tobacco Leaf Curing and chlorophyllous ratio, judge tobacco leaf easily roasting property, decision condition is as follows:

Upper and lower portion leaf more than 1.50, middle part tobacco leaf more than 2.30, flue-cured tobacco cultivars easily roasting property is better; Upper and lower portion leaf 1.00 ~ 1.50, middle part tobacco leaf 2.00 ~ 2.30, flue-cured tobacco cultivars easily roasting property is medium; Upper and lower portion leaf less than 1.00, middle part tobacco leaf less than 2.00, flue-cured tobacco cultivars easily roasting property is poor.

The beneficial effect that the present invention produces is: utilize carotenoid and chlorophyllous ratio in bake process, represents tobacco leaf yellowing degree, and according to the class leaf ratio of later yellowing stage in Tobacco Leaf Curing, easily roasting property is more scientific to evaluate tobacco leaf.Compare with art methods, overcome the shortcoming of the resistance to roasting property of traditional sense organ micro-judgment flue-cured tobacco, the degree of accuracy is high, and repeatability better, reduces the skill requirement to technical staff, can judge tobacco leaf easily roasting property accurately.

Detailed description of the invention

To the ripe fresh tobacco leaf of the different parts of 5 kinds in experimental plot, Jia Yue town, Zhucheng, Shandong Province, evaluation method of the present invention is taked to judge:

Gather respectively Zhongyan-100, NC55, NC297, middle cigarette 203 and the large gold dollar of safflower five kind bottoms, ripe fresh tobacco leaf that the normal growth at three positions in middle part and top is grown is loaded in electrothermal humiture automatic control flue-cured tobacco case, and smoke filling density is 70 kgm ^-3, toast according to three-phase-drying for tobacco technique; According to later yellowing stage carotenoid in Tobacco Leaf Curing and chlorophyllous ratio (i.e. class leaf ratio), judge tobacco leaf easily roasting property.Each process concrete kind leaf ratio is in table 1.

Table 1 different cultivars three position tobacco flue-curing later yellowing stage class leaf ratios

Kind	Zhongyan-100	NC55	NC297	Middle cigarette 203	The large gold dollar of safflower
						Inferior leads	2.12	1.82	1.36	1.64	0.84
Middle leaf	2.68	2.30	2.20	2.40	1.52
						Upper leaf	2.62	1.73	1.39	1.52	0.71

Easily roasting property according to each kind in decision condition his-and-hers watches 1 of the present invention judges, result of determination is in table 2.Decision condition is: upper and lower portion leaf more than 1.50, middle part tobacco leaf more than 2.30, and flue-cured tobacco cultivars easily roasting property is better; Upper and lower portion leaf 1.00 ~ 1.50, middle part tobacco leaf 2.00 ~ 2.30, flue-cured tobacco cultivars easily roasting property is medium; Upper and lower portion leaf less than 1.00, middle part tobacco leaf less than 2.00, flue-cured tobacco cultivars easily roasting property is poor.

Table 2 different cultivars tobacco leaf is roasting sex determination situation easily

Kind	Zhongyan-100	NC55	NC297	Middle cigarette 203	The large gold dollar of safflower
						Easily roasting property	Better	Better	Medium	Better	Poor

In order to verify the accuracy of result of determination of the present invention, the normal growth at above-mentioned five kind bottoms of separately gathering, three positions in middle part and top tobacco leaf of reaching maturity is loaded in electrothermal humiture automatic control flue-cured tobacco case, and smoke filling density is 70 kgm ^-3, toast according to three-phase-drying for tobacco technique; Cured tobacco leaf carries out classification by GB, the results are shown in Table 2, table 3, table 4 and table 5.

Table 3 inferior leads different cultivars cured tobacco leaf presentation quality

Table 4 middle leaf different cultivars cured tobacco leaf presentation quality

Table 5 upper leaf different cultivars cured tobacco leaf presentation quality compares

Can analyze from table 3, table 4 and table 5 and find out:

NC55, Zhongyan-100 and middle cigarette 203 kind cured tobacco leaf tobacco group content are large, and blue or green cigarette group content is little, and it is described, and easily roasting property is better.

NC297 kind cured tobacco leaf tobacco group content is medium, blue or green cigarette group large percentage, and it is described, and easily roasting sex expression is general.

Hongda cured tobacco leaf tobacco group content is medium, and blue or green cigarette group content is large, and it is described, and easily roasting property is poor.

Known by analyzing above, easily bake property by the inventive method to different cultivars to evaluate, fit like a glove with each kind cured tobacco leaf presentation quality characteristic, the class leaf of baking later yellowing stage is than the easily roasting property of having reacted tobacco leaf, and this illustrates the class leaf evaluation method that can as flue-cured tobacco easily bake property more complete in method.

Above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned citing, and the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.

Claims (1)

1. a method for quantitatively evaluating for property easily baked by flue-cured tobacco, and it is characterized in that, step is as follows:

The first step: be loaded on by the fresh tobacco leaf of different quality normal mature in electrothermal humiture automatic control flue-cured tobacco case, smoke filling density is 70 kgm ^-3, toast according to three-phase-drying for tobacco technique;

Second step: according to later yellowing stage carotenoid in Tobacco Leaf Curing and chlorophyllous ratio, judge tobacco leaf easily roasting property, decision condition is as follows:

Upper and lower portion leaf more than 1.50, middle part tobacco leaf more than 2.30, flue-cured tobacco cultivars easily roasting property is better; Upper and lower portion leaf 1.00 ~ 1.50, middle part tobacco leaf 2.00 ~ 2.30, flue-cured tobacco cultivars easily roasting property is medium; Upper and lower portion leaf less than 1.00, middle part tobacco leaf less than 2.00, flue-cured tobacco cultivars easily roasting property is poor.