GB/T 35568-2017Code of practice of type classification in Chinese Holstein (English PDF)
中国荷斯坦牛体型鉴定技术规程
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2017
Implementation date
July 1, 2018
Scope
GB/T 35568-2017 is the English-translated version of 中国荷斯坦牛体型鉴定技术规程.
GB/T 35568-2017 is the Chinese standard "Code of practice of type classification in Chinese Holstein". Its scope clause reads: This standard stipulates the basic requirements for the identification of Chinese Holstein cattle, the implementation of body shape appraisal, the method of body shape appraisal, and the linear assessment of various parts.
The method for calculating the total score of functional points and body types, and the division of body type levels, etc. This standard applies to the identification of Chinese Holstein cows. Its clauses include terms and definitions; basic requirements.
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Document preview — GB/T 35568-2017
National Standard of the People's Republic of China
- ICS
- 65.020.30
- Classification
- B 43
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 basic requirements
1 Scope
This standard stipulates the basic requirements for the identification of Chinese Holstein cattle, the implementation of body shape appraisal, the method of body shape appraisal, and the linear assessment of various parts.
The method for calculating the total score of functional points and body types, and the division of body type levels, etc.
This standard applies to the identification of Chinese Holstein cows.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 3157-2008 Chinese Holstein
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Body type identification
Method for quantification of cow body size. For each size trait, determine the trait's
Large values and minimum values are then scored on a linear scale.
3.2 Linear linearscore
An integer from 1 to 9 is used to indicate the extent to which the physical performance of dairy cows changes from one extreme to the other.
3.3 Functional
The linear score was converted to a score that reflects the ideal degree of physiological function of the cow. The range is 50 to 100.
3.4 Defective trait
The appearance of body appearance defects with a low frequency in the population. Do not make linear scores, only for deduction points.
4 basic requirements
4.1 Identification of the basic conditions of cattle
Healthy cows meeting the requirements of GB/T 3157 and having a milking days of 30 days to 180 days.
4.2 The basic conditions of the appraisers
After the professional training of the cow's body type identification, it regularly participates in the identification and comparison between the appraisers and between the regions.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.
Referenced standards
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