CN102172296A - Method for determining flue-curing property of flue-cured tobacco - Google Patents

Abstract

The invention discloses a method for determining the flue-curing property of flue-cured tobacco, which comprises: placing fresh tobacco leaves which normally grow yellow by 70 to 80 percent and have different qualities in a constant-temperature and constant-humidity black box, and observing and recording the yellowing and browning conditions of the tobacco leaves every other 12 hours; and determining the flue-curing property of the tobacco leaves according to the yellowing time of the tobacco leaves, and determining the flue-curing resistance of the tobacco leaves according to the browning time of the tobacco leaves, wherein the determining conditions include: when the yellowing time of lower tobacco leaves is 48 to 60 hours and the yellowing time of middle and upper tobacco leaves is about 72 hours, the flue-curing property of the tobacco leaves is very high, and when the browning time of the lower tobacco leaves is over 72 hours, the browning time of the middle tobacco leaves is over 120 hours and the browning time of the upper tobacco leaves is over 60 hours, the flue-curing property of the tobacco leaves is high. In the method, the drawbacks of the conventional method for determining the flue-curing property of flue-cured tobacco by experience are overcome, the operation process is simple and convenient, the accuracy is high, the repeatability is high, the equipment is simple, the operability is high, the experience requirement of technicians is lowered, and the flue-curing property of the tobacco leaves can be determined quickly and accurately.

Description

A kind of baking of flue-cured tobacco characteristic decision method

Technical field

The invention belongs to flue-cured tobacco modulation field, specifically utilize the camera bellows method to judge the baking of flue-cured tobacco characteristic.

Background technology

Tobacco flue-curing characteristic and baking quality of tobacco have extremely close relation.Baking property be tobacco leaf in the agronomy process, obtain with baking technology and effect closely-related self intrinsic quality characteristics, the baking property of tobacco leaf can be described with easily roasting property and anti-roasting property, the complexity of easily roasting property reflection tobacco leaf flavescence in bake process, dehydration.Anti-roasting property mainly is meant sensitiveness or the tolerance that tobacco leaf changes curing environment between fixation stage.

The growing way appearance in tobacco leaf field and ripe performance are the fundamental basis of judging baking property.Field growing is grown normal, the yellow tobacco leaf that can in good time normally fall, and general baking property is all better.The tobacco leaf that maturation is slow, the proper mature (ripe) phase is long, anti-roasting property is better, and easily roasting property is relatively poor; Short, maturation of proper mature (ripe) phase is tobacco leaf faster, and anti-roasting property is relatively poor, and easily roasting property is better; Yellow too fast will the meaning that fall easily baked and is not anti-roasting.It is yellow slow and some sheet elder generation Huang to fall, and is difficult for roasting also not anti-roasting.

The fresh tobacco leaf water content also is a key factor of reflection tobacco flue-curing characteristic.Usually, the tobacco leaf that water content is big is easy to flavescence, but the changing yellow stage dehydrating amount will influence fixation when not enough.The tobacco leaf that water content is few, changing yellow stage are difficult to thoroughly finish flavescence often because of the water water deficient, easily fixation.Generally, tobacco leaf Ratio of dry to fresh matter of leaves value is 5.5～8.0, and baking property is better; Ratio of dry to fresh matter of leaves value＜5.5 o'clock are difficult to flavescence during baking; When the Ratio of dry to fresh matter of leaves value 9.0 when above, easily flavescence, but often be difficult to fixation.

In actual production, also can judge the tobacco flue-curing characteristic according to feel, hold tobacco leaf quality softness, good springiness, not breakable, easily baking; The food value of leaf is crisp firmly, poor flexibility, breakable, the difficult baking of tobacco leaf.

Judge at present many sense organ means and experience such as to observe, hand is touched for the description of baking property, and the implication of these statements and standard are also inconsistent, there is not more unified index, be described as " easily roasting property good " etc. more, consistent view is that flavescence speed is medium, dehydration is moderate, and flavescence fixation and dehydration are dry can easily toast by harmonious tobacco leaf, but lacks some quantizating index that can reflect the baking of flue-cured tobacco characteristic.

Therefore, the quantitative approach that needs a kind of better judgement baking of flue-cured tobacco characteristic.By literature search, do not see the open report identical both at home and abroad with the present invention.

Summary of the invention

The objective of the invention is to overcome the deficiency that existing experience is judged the baking of flue-cured tobacco characteristic, a kind of science easy and simple to handle, degree of accuracy height are provided, the technical method of good reproducibility is to solve the technical barrier that the baking of flue-cured tobacco characteristic is judged.

The objective of the invention is to realize by following technical solution:

The first step: normal growth is grown 7-8 become the fresh tobacco leaf of yellow different quality to be positioned in the constant temperature and humidity camera bellows, require ambient black, stuffy, 30 ℃ of camera bellows temperature, camera bellows relative humidity 90% is observed record tobacco leaf flavescence and browning situation every 12h;

Second step: according to the easily roasting property of tobacco leaf flavescence time judgement tobacco leaf, according to the anti-roasting property of tobacco leaf browning time judgement tobacco leaf; Decision condition is as follows:

When the bottom tobacco leaf flavescence time is 48～60h, and the middle and upper part tobacco leaf flavescence time shows that the easily roasting property of tobacco leaf is good when being the 72h left and right sides;

When the bottom tobacco leaf browning time is more than the 72h, and the middle part tobacco leaf browning time is more than the 120h, and the upper tobacco leaf browning time is more than the 60h, shows that the anti-roasting property of tobacco leaf is better.

The present invention and art methods relatively, overcome tradition judge by rule of thumb the baking of flue-cured tobacco characteristic shortcoming, operating process is easy, degree of accuracy height, repeatability is better, and equipment is simple, workable, reduced experience requirement to the technical staff, can judge the tobacco flue-curing characteristic fast and accurately.

The specific embodiment

For realizing the object of the invention, further set forth content of the present invention and embodiment in conjunction with case:

Case study on implementation:, take judgement side of the present invention method to judge to the ripe fresh tobacco leaf of the different parts of 8 kinds in experimental plot, Jimo tobacco leaf farm, Tobacco Institute, Chinese Academy of Agricultural Science Qingdao:

Cigarette 100, cloud and mist 85 in gathering respectively, Coker 371, NC89, K326, dark green No. 1, the normal growth at 599 8 kind bottoms of big gold dollar of safflower and Da Bai muscle, three positions in middle part and top are grown 7-8 and are become respectively 3 of yellow fresh tobacco leafs, be positioned in the constant temperature and humidity camera bellows, environmental requirement dark, stuffy, 30 ℃ of temperature, relative humidity 90%, observe record tobacco leaf flavescence and browning situation every 12h, according to the easily roasting property of tobacco leaf flavescence time judgement tobacco leaf, according to the anti-roasting property of tobacco leaf browning time judgement tobacco leaf.Each handles the concrete flavescence time and the browning time sees Table 1.

Three positions of table 1 different cultivars tobacco leaf variable color time (h)

The easily roasting property and the anti-roasting property of each kind judges that result of determination sees Table 2 in the decision condition his-and-hers watches 1 according to the present invention.Decision condition is

When the bottom tobacco leaf flavescence time is 48～60h, and the middle and upper part tobacco leaf flavescence time shows that the easily roasting property of tobacco leaf is good when being the 72h left and right sides;

When the bottom tobacco leaf browning time is more than the 72h, and the middle part tobacco leaf browning time is more than the 120h, and the upper tobacco leaf browning time is more than the 60h, shows that the anti-roasting property of tobacco leaf is better.

Table 2

In order to verify the accuracy of result of determination of the present invention, other grows 7-8 and becomes yellow fresh tobacco leaf volume pole to be placed in Tobacco Institute, Chinese Academy of Agricultural Science's automation electric oven to toast by the standard baking process at the gather normal growth at above-mentioned eight kind bottoms, three positions in middle part and top, cured tobacco leaf carries out classification by GB, the results are shown in Table 2, table 3 and table 4.

Each kind lower tobacco leaf presentation quality of table 3

Each kind middle part tobacco leaf presentation quality of table 4

Each kind upper tobacco leaf presentation quality of table 5

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

Middle cigarette 100 kind cured tobacco leaf tobacco group content are big, illustrate that its easily roasting property is good, but because variegated group of content is bigger, so anti-roasting property is general.

Cloud and mist 85 kind cured tobacco leaf tobacco group content are big, and the blue or green cigarette group of little band and variegated group of content are all little, illustrate that its easily roasting property and anti-roasting property are all good.

Coker 371 kind cured tobacco leaf tobacco group content are medium, and blue or green cigarette group of little band and bluish yellow group large percentage illustrate that its easily roasting property is relatively poor, and variegated group of content is less, so anti-roasting property is better.

NC89 kind cured tobacco leaf tobacco group content is medium, and blue or green cigarette group of little band and bluish yellow group large percentage illustrate that its easily roasting property is relatively poor, and variegated group of content is less, so anti-roasting property is better.

K326 kind cured tobacco leaf tobacco group content is bigger, and the blue or green cigarette group of little band is relative less with bluish yellow group ratio, illustrate that its easily roasting property is better, but variegated group of content is bigger than normal, so anti-roasting property is general.

Dark green No. a kind cured tobacco leaf tobacco group content is lower, and the blue or green cigarette group of little band is relative more with bluish yellow group ratio, illustrates that its easily roasting property is relatively poor, and variegated group big with black poor cigarette group content, so anti-roasting property is poor.

The big gold dollar kind of safflower cured tobacco leaf tobacco group content is lower, and the blue or green cigarette group of little band is relative more with bluish yellow group ratio, illustrates that its easily roasting property is relatively poor, but variegated group little with black poor cigarette group content, so anti-roasting property is good.

Da Bai muscle 599 kind cured tobacco leaf tobacco group content are low, and the blue or green cigarette group of little band, bluish yellow group and variegated cigarette ratio are big, illustrate that its easily roasting property and anti-roasting property are all poor.

By above-mentioned analysis result as can be seen, by the inventive method each kind baking property is judged, toast back quality of tobacco characteristic with each kind in baking box and fit like a glove, the color shifting properties of tobacco leaf has reflected the baking property in the actual baking of tobacco leaf under the camera bellows condition.This explanation camera bellows method can be used as baking of flue-cured tobacco characteristic decision method fully.

Claims (1)

1. baking of flue-cured tobacco characteristic decision method is characterized in that step is as follows:

The first step: normal growth is grown 7-8 become the fresh tobacco leaf of yellow different quality to be positioned in the constant temperature and humidity camera bellows, require ambient black, stuffy, 30 ℃ of camera bellows temperature, camera bellows relative humidity 90% is observed record tobacco leaf flavescence and browning situation every 12h;

Second step: according to the easily roasting property of tobacco leaf flavescence time judgement tobacco leaf, according to the anti-roasting property of tobacco leaf browning time judgement tobacco leaf; Decision condition is as follows:

When the bottom tobacco leaf flavescence time is 48～60h, and the middle and upper part tobacco leaf flavescence time shows that the easily roasting property of tobacco leaf is good when being the 72h left and right sides;

When the bottom tobacco leaf browning time is more than the 72h, and the middle part tobacco leaf browning time is more than the 120h, and the upper tobacco leaf browning time is more than the 60h, shows that the anti-roasting property of tobacco leaf is better.