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GB/T 37069-2018: Rules for alfalfa fall dormancy rate evaluation
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GB/T 37069-2018: Rules for alfalfa fall dormancy rate evaluation

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Rules for alfalfa fall dormancy rate evaluation ICS 65.020.20 B25 National Standards of People's Republic of China 苜蓿 眠 sleep grading assessment Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the Ministry of Agriculture and Rural Affairs of the People's Republic This standard is under the jurisdiction of the National Animal Husbandry Standardization Technical Committee (SAC/TC274). This standard is drafted by. Beijing Forestry University, National Animal Husbandry Station. The main drafters of this standard. Lu Xinshi, Yan Xujiang, Wang Tiemei, Li Xinyi, Yan Xiujiang, Qi Xiao, Feng Changsong, Zhang Jingni, Guan Yu, Ma Jinxing, Shao Linhui, Xu Dawei, Wang Hongliu, Gao Fei. 苜蓿 眠 sleep grading assessment

1 Scope

This standard stipulates the rules for the classification of perennial tetraploid fall dormancy. This standard is applicable to the evaluation of fall dormancy of alfalfa, hybrid flower and yellow bud varieties, strains and their germplasm materials.

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 edition (including all amendments) applies to this document. GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Fall dormancy faldormancy In the northern latitudes, due to the shortening of sunshine hours and the decrease of temperature in autumn, the physiological dormancy of cockroaches is caused, resulting in plant morphology, growth rate and re The characteristics of the ability to change. 3.2 Fall dormancy level faldormancyrate The degree of fallacy of the fall dormancy expressed by the dimensionless number ranges from 0 to 11. The smaller the value, the stronger the fall dormancy. 3.3 Fall dormancy type faldormancygrouptype The type according to the degree of similarity of the Qiu Jinmian class. Note. The type of fall dormancy is divided into extremely fall dormancy type, fall dormancy type, semi-autumn sleep type, non fall dormancy type and very non fall dormancy type. 3.4 Autumn castration falcutting The autumn castration method used when grading the fall dormancy. Note. Usually performed 30 days before the first frost period. 3.5 Recycled natural height regrowthcanopyheight The natural height of the regenerated plants after the fall mowing is the vertical height from the ground to the highest part of the plant.

4 fall dormancy rating

4.1 fall dormant standard control variety When the fall dormancy level is assessed, the fall dormant standard control variety should be used. The control species fall asleep grade 0 to 11 grade, see Appendix A. ...