GB/T 37744-2019 English PDF

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GB/T 37744-2019: Meteorological grades of hot damage to rice
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37744-2019	199	Add to Cart	3 days	Meteorological grades of hot damage to rice	Valid

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Basic data

Standard ID: GB/T 37744-2019 (GB/T37744-2019)
Description (Translated English): Meteorological grades of hot damage to rice
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A47
Classification of International Standard: 07.060
Word Count Estimation: 10,174
Date of Issue: 2019-06-04
Date of Implementation: 2020-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37744-2019: Meteorological grades of hot damage to rice

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Meteorological grades of hot damage to rice ICS 07.060 A47 National Standards of People's Republic of China Rice heat damage meteorological grade Published on.2019-06-04 2020-01-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Terms and Definitions 1 3 Rice heat damage meteorological grade 1 3.1 Strength level 1 3.1.1 Single point thermal damage level 1 3.1.2 Regional heat damage intensity level 2 3.1.3 hazard factor strength level 3 3.2 Impact Level 4 3.2.1 Production factor impact level 4 3.2.2 Regional heat damage level 5 3.3 Damage Level 5 3.3.1 Calculation method of indicators 5 3.3.2 Classification 6 Reference 7

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Meteorological Administration. This standard is under the jurisdiction of the National Agricultural Meteorological Standardization Technical Committee (SAC/TC539). This standard was drafted. National Meteorological Center, Hubei Climate Center, Jiangsu Academy of Agricultural Sciences, Huazhong Agricultural University, China Meteorological Department Institute of Studies. The main drafters of this standard. Lu Houzhen, Zhang Yanhong, Feng Ming, Li Bingbai, Liu Anguo, Mao Fei, Zhuang Liwei, Li Yijun, Wu Menxin. Rice heat damage meteorological grade

1 Scope

This standard specifies the intensity, impact, damage meteorological grade of the rice and its index calculation and classification methods. This standard applies to rice heat hazard monitoring and assessment.

2 Terms and definitions

The following terms and definitions apply to this document. 2.1 Rice heat hazard hotdamagetorice Agro-meteorological disasters due to persistent high temperatures leading to loss of rice yield. 2.2 High temperature days numberofhightemperaturedays The maximum temperature in the rice growing season is greater than or equal to 35 °C. 2.3 Hazard heat accumulated temperature accumulatedhotdamagetemperature When the number of consecutive high-temperature days (2.2) in the booting-flowering and filling stages of rice reaches 3 days and above, the daily maximum temperature is higher than 35 °C. 2.4 High temperature ripening hightemperaturetoforcemature Due to the high temperature, the rice grain filling process is obviously shortened, the maturity period is advanced, and the grain weight is reduced. 2.5 Heat damage rate lossrateofhotdamage The ratio of the decrease in the amount of rice yield factor per unit area caused by heat damage to the value of the highest potential yield factor. 2.6 Seed setting rate The percentage of the number of grains in the rice paddy as a percentage of the total number of grains.

3 Rice heat damage meteorological grade

3.1 Strength level 3.1.1 Single point thermal intensity level 3.1.1.1 Calculation method of indicators Single-point high-temperature heat damage intensity of rice (one-season rice, double-season early rice) at booting-flowering stage and filling stage, using hazard heat accumulated temperature as an indicator For the calculation method, see equations (1) and (2). Ha=∑ j=1 Nj i=1 f(Tijh) (1) ......

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