GB/T 2930.4-2017Rules of seed testing for forage, turfgrass and other herbaceous plant -- The germination test (English PDF)

Foreword

GB/T 2930 "grass seed inspection procedures" is divided into 11 parts.

--- GB/T 2930.1 Grass seed testing procedures sample;

--- GB/T 2930.2 Grass seed testing procedures Clarity analysis;

--- GB/T 2930.3 grass seeds test procedures Determination of other plant seeds;

--- GB/T 2930.4 grass seed testing procedures sprout test;

--- GB/T 2930.5 grass seed testing procedures biochemical (tetrazolium) determination of viability;

--- GB/T 2930.6 grass seed testing procedures health determination;

--- GB/T 2930.7 Grass seed testing procedures Species and species determination;

--- GB/T 2930.8 grass seed testing procedures moisture determination;

--- GB/T 2930.9 grass seed testing procedures weight determination;

--- GB/T 2930.10 grass seeds inspection procedures Determination of coated seeds;

--- GB/T 2930.11 grass seed inspection procedures inspection report.

This section GB/T 2930 Part 4.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This Part replaces GB/T 2930.4-2001 "forage seed testing procedures sprout test." This section GB/T 2930.4-2001

In addition, editorial changes in addition to the main technical changes are as follows.

--- The standard name from the "grass seed testing procedures germination test" renamed the "grass seed testing procedures germination test" (see the cover,

2001 edition of the cover);

--- In the foreword, the drafting rules (see the preamble) on which the standard compilation is based have been added; statements of the nature of the appendix have been deleted (see.2001 edition

The foreword);

--- Removed "ISTA Preface" (see the.2001 edition of the ISTA Preface);

--- In the range, an increase of "ecological grass, ornamental plants and medicinal plants" (see Chapter 1);

--- In "normative references", an increase of "NY/T 1238" grasses and turf grasses seedlings assessment procedures "" (see Chapter 2);

--- Removed "test purpose" (2001 version of Chapter 3);

--- In the "terms and definitions", an increase of "germination bed" (see 3.12); revised "seedling main structure" "50% rule" "normal young

Seedlings "and" dead embryos "(see 3.3, 3.4, 3.5, 3.7 and 3.1.1,.2001 edition 4.3, A4.17, 4.4 and 4.6

And 4.7.3); deleted "intact seedlings" "seedlings with minor defects" "secondary infected seedlings" "empty seeds" "seedless seeds"

And "insect pest seeds" (2001 version 4.4.1, 4.4.2, 4.4.3, 4.7.4, 4.7.5 and 4.7.6), some of the relevant content will be deleted

Into the text (see 5.6.2.1, 5.6.2.2, 5.6.2.3 and 5.6.5.4);

--- "Apparatus and Materials", modified "germination bed" "water" and "several appliances" (see 4.1, 4.2 and 4.3,.2001 version 5.1 and

5.2);

--- In the "test procedure", amended the "test sample dispensing" "temperature" "pre-washing", identified in the "basic principles" "complex germ

Sub-unit seedlings "and the judgment of non-germinating seeds" other types "(see 5.1, 5.3.3, 5.4.4.1, 5.6.1,

1 Scope

GB/T 2930 provisions of this part of the seed germination test methods and procedures.

This section applies to the grass, grass, feed crops, ecological grass, ornamental grasses and medicinal plants and other seed quality test germination test.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2930.1 grass seed test procedures sample

GB/T 2930.2 grass seed testing procedures clarity analysis

GB/T 8170 rounded repair rules and limit values of the representation and judgment

NY/T 1238 Forage and turfgrass seedling appraisal procedures

3 Terms and definitions

The following terms and definitions apply to this document.

3.1

Germination germination

Seed germination in the laboratory and reached a certain stage of development, the main structure of seedlings at this stage can show that it is suitable for the field conditions

Can further grow into normal plants.

3.2

Germination rate germinationpercentage

In Table 1, Table 2 under the conditions and time produced by the normal seedlings accounted for the number of seeds for the test.

3.3

The main structure of seedlings theessentialseedlingstructures

The seedlings can be further developed into the major constructs of normal plants, including root systems (primary roots, seed roots in some cases), seedling embryo axes

(Hypocotyls, hypocotyls, mesocarp, parietal buds in some genera of grasses), cotyledons (1 to several), and coleoptile (all genus Gramineae).

3.4

50% rule the50% rule

More than half or more of the cotyledon or primary leaf tissue has normal function as a normal seedling; if more than half of the tissue does not have

Function (such as missing, necrosis, discoloration or decay), abnormal seedlings. Applies to the evaluation of cotyledons and primary leaves.

Does not apply to the top bud or the evaluation of the surrounding tissue of the top bud. When the top bud or the top of the bud tissue necrosis, decay, regardless of cotyledons and primary leaves

The situation is not normal seedlings.

3.5

Normal seedlings normalseedlings

In good soil and suitable moisture, temperature and light conditions, with continued growth and development to become the potential of normal plant seedlings. Including finished