NY/T 2997-2016 in English
VALIDGrassland classification
- Issued on:2016-11-04
- Implemented on:2017-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$253.00
| Standard No: | NY/T 2997-2016 |
| Document status: | VALID |
| Title in English: | Grassland classification |
| Title in Chinese: | 草地分类 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-11-04 |
| Implemented on: | 2017-04-01 |
| Professional Classification: | NY-Agriculture |
| Related Keywords: | grassland classification introduction standard framework
class climate zone + vegetation type group temperature grassland class grassland classification system classification level division basis typical example first level artificial grassland grassland resource management |
| Related Topics: | grassland
First-class land Second-class land gentle The latest grassland classification standards National Grassland Classification Technology ny/t2997-2016 |
Introduction
Standard Framework and Technical Evolution
NY/T 2997-2016 is the core standard for grassland resource management in my country. It inherits and develops the GB/T 1.1-2009 standardization work guidelines and is managed by the National Technical Committee for Animal Husbandry Standardization (SAC/TC 274). For the first time, the standard uses the humidity index as a core classification indicator, realizing the quantitative association between climate factors and vegetation characteristics.
Analysis of grassland classification system
| Classification level | Division basis | Typical example |
|---|---|---|
| First level: Class | Climate zone + vegetation type group | Temperature grassland class (A), alpine meadow class (I) |
| Second level: Type | Dominant species combination | A01 (Stipa grandis type), B05 (Stipa purpurogenum type) |
Key technical indicators
Humidity threshold: 0.13 is used as the boundary between desert and grassland (e.g., the humidity requirement for temperate desert is ≤0.13)
Definition of dominant species: Plants with similar feeding value can be merged (e.g., the Leymus chinensis type includes the combination of Leymus chinensis and Stipa baikalense)
Implementation suggestions
- GPS coordinates and community photos should be recorded simultaneously during field surveys>
- The classification of artificial grassland should indicate the improvement method (e.g., reseeding/returning farmland to grassland)
- The mountain meadow class needs to be marked with the altitude gradient (the H class in the standard requires >500mm precipitation)
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