GB/T 8472-2021Beijing black pig (English PDF)

Foreword

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

This document replaces GB/T 8472-2008 "Beijing Black Pig". Compared with GB/T 8472-2008, except for structural adjustments and editorial changes In addition, the main technical changes are as follows:

--- Changed the scope of this document (see Chapter 1, Chapter 1 of the 2008 edition);

--- Changed normative references (see Chapter 2, Chapter 2 of the 2008 edition);

--- Added variety sources (see Chapter 4);

--- Changed the adult body weight (see Chapter 6, 3.1.2 of the 2008 edition);

--- Changed the reproductive performance (see 7.1, 3.2 of the 2008 edition);

--- Increased growth and development (see 7.2);

--- Changed the fattening performance (see 7.3, 3.3 of the 2008 edition);

--- Changed carcass traits (see 7.4, 3.4 of the 2008 edition);

--- Increased muscle mass (see 7.5);

--- Changed the measurement method (see Chapter 8, 4.2.1 of the 2008 edition);

--- Deleted the breeding pig grade scoring standard (see 4.2.2 of the 2008 edition);

--- Changed the basic requirements for use (see Chapter 9, Chapter 5 of the 2008 edition);

--- Deleted the Beijing Black Pig Breeding Pig Approval Certificate (see Appendix B of the 2008 edition).

1 Scope

This document specifies the breed origin and characteristics, body shape and appearance characteristics, adult body weight and size, production performance, measurement methods and breeds of Beijing black pigs. Use basic requirements.

This document applies to breed identification of Beijing black pigs.

2 Normative references

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

NY/T 820 Technical Specifications for Registration of Breeding Pigs

NY/T 821 Technical Regulations for Determination of Pork Quality

NY/T 822 Procedure for Determination of Performance of Breeding Pigs

NY/T 825 Technical Specification for Determination of Lean Pork Carcass Traits

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Variety origin and characteristics

Beijing black pigs were bred in the former Beijing Shuangqiao Farm and Beijiao Farm.

Introduced breeds such as pigs, Middle Yorkshire pigs, Soviet large white pigs, etc., are bred through cross-breeding. With good meat quality, roughage resistance, adaptability strong characteristics.

5 Physical appearance characteristics

The coat is black, the body is medium, the structure is well-proportioned, the face is slightly concave, the forehead is wide, the ears are inclined forward and upward, the back and waist are broad and straight, and the hips are plump. Full, strong limbs; more than 7 pairs of nipples, evenly arranged. See Appendix A for photos of Beijing black pig breeds.

6 Adult body weight

Adult boars (23 months old to 25 months old) weigh 204.3kg±11.5kg, body length 152.0cm±7.2cm, body height 80.3cm±4.4cm, Chest circumference 136.4cm±3.9cm; adult sow (3rd parity, 2 months gestation) weight 189.4kg±14.2kg, body length 146.0cm±5.2cm, body weight 146.0cm±5.2cm Height 74.6cm±3.6cm, bust 135.7cm±6.3cm.