CN109580926B - Method for comprehensively identifying day age of Mount Ruizhou white ducks - Google Patents
Method for comprehensively identifying day age of Mount Ruizhou white ducks Download PDFInfo
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Abstract
A method for comprehensively identifying the age of Mount Youzhou white ducks in days belongs to the technical field of zootechnics. The method selects relevant indexes of the day age of the ducks such as main muscle tissues, organs, bones and the like, utilizes SPSS to perform correlation analysis, then utilizes the Curve expert2.6 to fit a Curve model, and finally determines an optimal Curve model and an identification scheme. The method can promote the high-quality meat duck industry by accurately identifying the day age of the Mount Youzhou white ducks. On one hand, the inaccuracy and limitation of the traditional method for judging the day age of the duck through the physical form are changed; on the other hand, the market stability of the high-quality meat ducks is maintained, and the situation that some bad merchants are fake and trusty in order to save the production cost can be effectively prevented, so that consumers can obtain high-quality products.
Description
Technical Field
The invention relates to a method for comprehensively identifying the age of Mount Youzhou white ducks in days, belonging to the technical field of zootechnics.
Background
The Youzhou Fengtou white duck is the only domestic ornamental and medicinal genetic resource formed by Yangzhou university and Tian Jiang City Tian Cheng agriculture science and technology Limited company after more than 10 years of work. The Mount Youzhou white duck is characterized by black mouth, white feather and chicken head, is rich in trace element selenium and glutamic acid, has the advantages of unique meat flavor, rich nutrition and the like, and is highly favored by consumers.
At present, the quality of high-quality duck meat is researched more, but a unified evaluation standard is lacked, so that the market products of the duck meat and the dragon are mixed, and the development of high-quality duck industry represented by the phoenix-head white duck is seriously hindered. Generally, high-quality ducks grow larger meat ducks slowly, the feeding period is long, and only ducks meeting a certain feeding age have better flavor and taste; however, consumers are difficult to accurately judge the real age of the ducks in days only through physical and morphological characteristics, so that a new method for accurately identifying the age of the high-quality ducks in days is needed to be established, the unification of high-quality products and high-end values is realized, and the healthy development of the high-quality duck industry is ensured.
Disclosure of Invention
The invention aims to provide an accurate comprehensive identification method for the day age of the Mount Phoenix white ducks in the Runzhou province, aiming at the defects of the prior art, and a new method for accurately identifying the day age of the ducks is formulated according to the fat content in muscle tissues, the indexes of main organs and the growth and development conditions of bones along with the day age.
The technical scheme of the invention is as follows:
a comprehensive identification method for the day age of Munzhou Fengtou white ducks is characterized in that relevant indexes of the day age of the Munzhou Fengtou white ducks are selected, SPSS is used for carrying out correlation analysis, then a Curve expert2.6 fitting Curve model is used, and finally an optimal Curve model and an identification scheme are determined.
Further, the indexes related to the day age of the ducks comprise muscle tissues, organs and bones.
Further, the relevant indexes of the day age of the ducks are as follows: heart weight to body weight ratio, liver weight to body weight ratio, tibia length, keel length, intramuscular fat content.
Further, SPSS was used for differential analysis of various indices at different ages of day:
from the above table, it can be seen that: the weight, the liver growth index, the tibia length and the keel length of the broilers are obviously increased along with the increase of the day age, wherein the tibia length reaches a growth inflection point at the age of 7 weeks, and the growth trend accords with the S-shaped growth trend of livestock and poultry; the liver growth index shows a significant decline with increasing age in days; the heart growth does not change much with age in days; the length of the keel and the content of intramuscular fat slowly increase along with the increase of the day age, and the difference between the 9-week age and the 43-week age is not obvious, namely the growth inflection point is reached.
Further, a growth Model of weight, relative weight of liver, length of tibia, length of keel and increase of intramuscular fat content with age is respectively made by using the Curve Expert, and the dynamic change process is described by using a Hyperbolic Decline, Rational Model, Bleasdale and Bleasdale-YD Model:
finally by comparison of R2And selecting the optimal linear model, and inputting X values corresponding to various indexes to obtain the reliable day age of the white phoenix ducks.
In order to stabilize the market order of high-quality meat ducks and the legal rights of consumers, relevant departments can more accurately identify the age of the ducks in days, meet the requirements of the consumers, eliminate the inconvenience caused by the inconsistency of meat quality evaluation indexes and determination methods, and standardize the market order of the Langhou white ducks in the Changzhou, thereby expanding the market share. The invention aims to standardize the evaluation index and the identification method of the day age of the Munzhou Fengtou white ducks so as to improve the accuracy of the obtained data and better serve the reality.
The method can promote the high-quality meat duck industry by accurately identifying the day age of the Mount Youzhou white ducks. On one hand, the inaccuracy and limitation of the traditional method for judging the day age of the duck through the physical form are changed; on the other hand, the market stability of the high-quality meat ducks is maintained, and the situation that some bad merchants are fake and trusty in order to save the production cost can be effectively prevented, so that consumers can obtain high-quality products.
Detailed Description
A method for comprehensively identifying the age of Mount Youzhou white ducks in days comprises the following steps: selecting relevant indexes of the day age of the ducks such as main muscle tissues, organs, bones and the like, performing correlation analysis by using SPSS, fitting a Curve model by using Curve expert2.6, and finally determining an optimal Curve model and an identification scheme.
1. The method for measuring the evaluation indexes of the day ages of 5 ducks selected in the embodiment comprises the following steps:
1) relative weight of heart
Heart weight to body weight ratio.
2) Relative weight of liver
Liver weight to body weight ratio.
3) Length of tibia
The left tibia is uniformly separated after the jugular vein of the leucomala leucorrhoeae of the Guizhou province is subjected to bloodletting and slaughtering, and then the length of the tibia is measured by a vernier caliper.
4) Keel length
The keel length is measured with calipers referenced NY/T823-2004.
5) Intramuscular fat
A pectoral muscle sample of about 15g was taken and the measurement of the intramuscular fat content (calculated as dry muscle) of the sample was carried out according to GB/T14772.
2. SPSS was used as an index for differential analysis of different ages in days:
TABLE 1 differential analysis of different ages in days using SPSS as each index
As can be seen from Table 1, the weight, the liver growth index, the tibia length and the keel length of the broilers are obviously increased along with the increase of the day age, wherein the tibia length reaches a growth inflection point at the age of 7 weeks and accords with the S-shaped growth trend of the livestock; the liver growth index shows a significant decline with increasing age in days; the heart growth does not change much with age in days; the length of the keel and the content of intramuscular fat slowly increase along with the increase of the day age, and the difference between the 9-week age and the 43-week age is not obvious, namely the growth inflection point is reached.
3. Optimal linear model for making date-age related indexes of chicken-headed ducks by applying Curve Expert
TABLE 2 best linear model of date age related indexes of phoenix-headed ducks
Respectively making a growth Model of the weight, the relative weight of the liver, the length of the tibia, the length of the keel and the increase of intramuscular fat with the age of the day by using the Curve Expert, describing the dynamic change process by using a Hyperbolic Decline, a Rational Model, Bleasdale and Bleasdale-YD Model, and finally determining a coefficient R by comparison2And selecting the optimal linear model, and inputting X values corresponding to various indexes to obtain the reliable day age of the white phoenix ducks.
Claims (1)
1. A comprehensive identification method for the day age of Munzhou Fengtou white ducks is characterized in that relevant indexes of the day age of the Munzhou Fengtou white ducks are selected, SPSS is utilized for correlation analysis, then a Curve expert2.6 fitting Curve model is utilized, and finally an optimal Curve model and an identification scheme are determined; the relevant indexes of the day age of the ducks are as follows: heart weight to body weight ratio, liver weight to body weight ratio, tibia length, keel length, intramuscular fat content;
SPSS was used as an index for differential analysis of different ages in days:
from the above table, it can be seen that: the weight, the liver growth index, the tibia length and the keel length of the broilers are obviously increased along with the increase of the day age, wherein the tibia length reaches a growth inflection point at the age of 7 weeks, and the growth trend accords with the S-shaped growth trend of livestock and poultry; the liver growth index shows a significant decline with increasing age in days; the heart growth does not change much with age in days; the length of the keel and the content of intramuscular fat slowly increase along with the increase of the day age, and the difference between the 9-week age and the 43-week age is not obvious, namely the growth inflection point is reached;
respectively making a growth Model of weight, relative weight of liver, length of tibia, length of keel and intramuscular fat content increasing with the age of day by using Curve Expert, and describing a dynamic change process by using a Hyperbolic Decline, a Rational Model, Bleasdale and Bleasdale-YD Model:
finally by comparison of R2And selecting the optimal linear model, and inputting X values corresponding to various indexes to obtain the reliable day age of the white phoenix ducks.
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| CN110129454A (en) * | 2019-05-13 | 2019-08-16 | 扬州大学 | A kind of white duck varieties identification method of Runzhou phoenix |
| CN111820184B (en) * | 2020-06-09 | 2022-01-11 | 扬州大学 | Method for determining optimal market-selling age of meat ducks |
| CN113564265A (en) * | 2021-08-27 | 2021-10-29 | 浙江省农业科学院 | Method for identifying age of duck based on quantitative PCR |
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| 肉鸡肌肉、内脏和消化器官的生长规律;韩进城等;《饲料工业》;20141231(第10期);第27页-29页 * |
| 黑羽肉鸭不同屠宰日龄体尺性状分析;陈明银等;《湖北农业科学》;20150430;第54卷(第7期);第1644-1647页 * |
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