GB 6142-2025Quality grading of gramineous seed (English PDF)

3 Terms and definitions

4 Technical requirements

5 Sampling

6 Inspection methods

7 Grade assessment

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB 6142-2008 "Grading of Gramineae Seeds". Compared with GB 6142-2008, the only changes are structural adjustments and editing. Aside from the sexual alterations, the main technical changes are as follows:

a) The "moisture" index value has been changed to 13% (see Table 1,.2008 version);

b) The following have been added. "Hybrid Ice Grass", "Hunan Barnyard Grass", "Short-awned Wheatgrass", "Chinese Sheep Festuca", "Leymus chinensis", "Swallowtail Millet", and "Sea Paspalum (Seashore Paspalum)". Grading indicators for the quality of "Cold-climate Kentucky Bluegrass" and "Sorghum" grass seeds (see serial numbers 2, 20, 21, 33, 39, 44, 49, 53 and... in Table 1). 65);

c) The grass species "Feathergrass" has been removed (see Table 1 in the.2008 edition);

d) The purity index values for "corn" have been changed (see Table 1,.2008 edition of Table 1);

e) The following terms have been changed. *Isodon serrata*,...Alopecurus aequalis*, *Oat*, *Bryophytum comosum*, *Bryophytum purpureus*, *Ferula orientalis*, and *Barnyardgrass*. "Leymus chinensis", "Wilting Leymus chinensis", "Old Wheatgrass", "Long-spiked Wheatgrass", "Curved-leaved Thrush", "False Fructus", "Purple Festuca", "Wool Grass", "Cloth Grass" Barley grass, short-awned barley grass, barley, sheep grass, fescue ryegrass, multiflora ryegrass, perennial ryegrass, and hairy birdgrass. "Barnyardgrass", "Bahiagrass", "Silky Paspalum", "Broadleaf Paspalum", "Pearl Millet", "Gnaphalium", "Cat's Tail Grass", "Kenchai Grass", "Common Kentucky Bluegrass", "New" Wheatgrass, Korean Alkali Grass, Alkali Grass, Star Grass, Qinghai Goosegrass, Awnless Goosegrass, Rye, Millet, Sorghum, Sudan Grass Germination rate values for "Stipa kryptonite", "Triticale", and "Zoysia japonica" (see Table 1,.2008 edition);

f) The following terms have been changed. "ice grass", "desert ice grass", "sand reed", "giant creeping bentgrass", "prostrate creeping bentgrass", "large wheatgrass", "yellow flower grass", and "oat grass". Oats, carpet grass, flat-spike brome, awnless brome, buffalo grass, African tiger tail grass, tiger tail grass, bermudagrass, orchardgrass, barnyard grass "Leymus chinensis", "Wilting Leymus chinensis", "Old Wheatgrass", "Long-spiked Wheatgrass", "Curved-leaved Thrush", "False Fructus", "Sorghum", "Reed Fescue" "Festuca", "Meadow Festuca", "Purple Festuca", "Fluorescent Grass", "Barley", "Sheep Grass", "Festuca Ryegrass", "Floral Ryegrass", "Perennial Rye" "Grass", "Hairygrass", "Silky Grass", "Broadleaf Grass", "Gnaphalium", "Corydalis", "Corydalis", "Kenyan Grass", "Common Kentucky Bluegrass" "New Wheatgrass", "Korean Alkali Grass", "Alkali Grass", "Star Grass", "Qinghai Goosegrass", "Angelless Goosegrass", "Rye", "African Foxtail Grass", "High Dan" See Table 1 for the seed count index values of other plants including "grass", "Sudan grass", "Stipa krypton", "triticale", "maize", and "zoysia grass" (2008). Table 1 of the version);

g) The seed value index values for the corresponding grass species in

e) have been changed (see Table 1, Table 1 in the.2008 edition); The Chinese names of *Paspalum distichum* (see Table 1,.2008 edition);

i) Added "samples" (see Chapter 5);

j) The "Test Methods" have been changed (see Chapter 6,

4.2 of the.2008 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the Ministry of Agriculture and Rural Affairs of the People's Republic of China. The release history of this document and the document it replaces is as follows:

---First published as GB 6142-1985 in 1985, and revised for the first time in.2008;