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GB/T 21985-2008: Temperature index of high temperature harm for main crops
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21985-2008 | English | 169 |
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Temperature index of high temperature harm for main crops
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GB/T 21985-2008
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Basic data | Standard ID | GB/T 21985-2008 (GB/T21985-2008) | | Description (Translated English) | Temperature index of high temperature harm for main crops | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A47 | | Classification of International Standard | 07.060 | | Word Count Estimation | 7,785 | | Date of Issue | 2008-06-03 | | Date of Implementation | 2008-11-01 | | Quoted Standard | QX/T 50-2007 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 9, 2008 (No. 122 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the rice, wheat, corn, cotton, canola hazards by high temperature indicators. This standard applies to agro-meteorological monitoring side of the terminator, early warning, assessment, agricultural production, scientific research, and other related fields. | GB/T 21985-2008: Temperature index of high temperature harm for main crops---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.
Temperature index of high temperature harm for main crops
ICS 07.060
A47
National Standards of People's Republic of China
The main crops of high temperature hazards temperature index
Posted 2008-06-03
2008-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard proposed by the China Meteorological Administration.
The standard by the China Meteorological Administration Policy and Regulation Department.
This standard by the Hubei Provincial Meteorological Bureau Wuhan Regional Climate Center is responsible for drafting, Plant Science and Technology, Huazhong Agricultural University, Wuhan meteorological
Board participate.
The main drafters of this standard. Feng Ming, Liu Anguo, WU Yi City, Hu Youlin, Zhang Fang Fang.
Introduction
With global climate change, China's increase in extreme weather events, crop growing increasingly aggravated by the high temperature hazards. In order for farmers
Disaster monitoring crop due to high temperatures and do harm, early warning and disaster assessment and disaster prevention and mitigation measures taken, this standard unified and standardized main agricultural
Crop due to temperature index temperature hazards.
The main crops of high temperature hazards temperature index
1 Scope
This standard specifies the rice, wheat, corn, cotton, rapeseed by high temperature hazards temperature index.
This standard applies to agricultural meteorological disaster monitoring, early warning, assessment, agricultural production, research and other related fields.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
QX/T 50-2007 surface weather observing practices - Part 6. air temperature and humidity observations
3 Terms, definitions and symbols
QX/T 50-2007 established the following terms, definitions and symbols apply to this standard.
3.1
When the temperature rises to a certain extent, adversely affected crop growth, leading to stunted crop yield and quality were poor,
Crop an organ or plant death.
3.2
Individual plant growth process, somatic cell mitosis proliferation on the basis of the time when the reproductive organs occurs in young bud
Special cell division occurs.
3.3 Symbol
TMax. daily maximum temperature.
T. daily average temperature.
H. air relative humidity.
4 high temperature hazard indicators
4.1 Rice
4.1.1 Early Rice
Seedlings of film. TMax≥26 ℃, the film seedlings suffer.
- Heading. for three consecutive days TMax≥35 ℃ or T≥30 ℃, the pollen development affected flowering and poor pollination and fertilization.
Filling Stage. TMax≥35 ℃ or T≥30 ℃, the Filling shortened, early maturity, yield and quality.
4.1.2 Middle Rice (including late season)
Seedlings of film. TMax≥26 ℃, the film seedlings suffer.
Booting stage to heading stage. three consecutive days TMax≥35 ℃ or T≥30 ℃, the pollen development affected flowering and poor pollination and fertilization.
Filling Stage. T≥28 ℃, the Filling shortened, early maturity, grain weight decreased to increase the rate of blighted valley, Production, and
quality.
4.1.3 Late
Seedling period. TMax≥35 ℃ or T≥30 ℃, the seedling quality is poor.
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