GB/T 3157-2023Chinese Holstein (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Standardization Industry Guidelines Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 3157-2008 "Chinese Holstein Cattle". Compared with GB/T 3157-2008, except for structural adjustment and editing In addition to sexual changes, the main technical changes are as follows.

--- Deleted terms and definitions (see 3.1~3.11 of the 2008 edition);

--- Increased variety sources and characteristics (see Chapter 4);

--- Changed the weight and body size indicators (see 6.1, 6.2, 6.3, 4.2.1, 4.2.2, 4.2.3 of the 2008 edition);

--- Changed the milk production performance indicators (see 7.1, 7.2, Chapter 5 of the 2008 edition);

--- Changed the reproductive performance indicators (see 8.1, 8.2, 8.3, 6.1, 6.2, 6.3 of the 2008 edition);

--- Deleted the adaptability index (see Chapter 7 of the 2008 edition);

--- Deleted the variety registration regulations (see Chapter 8, Appendix A of the 2008 edition);

---Deleted pedigree registration (see Chapter 9, Appendix B of the 2008 edition);

--- Added performance measurement (see Chapter 9);

--- Increased Chinese Holstein cattle performance indicators determination method (see Appendix B).

1 Scope

This document stipulates the weight and body size, milk production performance and reproductive performance of Chinese Holstein cattle, and describes the source of breeds, appearance characteristics and performance determination.

This document is applicable to the breed identification of Chinese Holstein cattle.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB 4143 Bovine frozen semen

NY/T 2659 Rapid Determination of Milk Fat, Protein, Lactose and Total Solids Infrared Spectroscopy

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 Variety sources and characteristics

Chinese Holstein cattle are imported purebred Holstein cattle from abroad, domesticated and crossed with Chinese native yellow cattle, and undergo a long-term process.

It is a large-scale dairy cattle breed with consistent characteristic performance, stable genetic performance and strong adaptability, which is formed through the improvement of selective breeding. Examined in 1985 It was named "Chinese Black and White Dairy Cow" and was renamed "Chinese Holstein Cow" in 1992. Suitable for feeding in low-to-middle-altitude, cold-temperature and dry climate areas It is distributed in various provinces and autonomous regions in my country, mostly in Hebei, Shanxi, Inner Mongolia, Liaoning, Heilongjiang, Shandong, Henan, Shaanxi, Ningxia, and Xinjiang.

5 Physical features