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LY/T 3196-2020: Technical regulations for carbon accounting of bamboo forest
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Technical regulations for carbon accounting of bamboo forest
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LY/T 3196-2020
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Basic data | Standard ID | LY/T 3196-2020 (LY/T3196-2020) | | Description (Translated English) | Technical regulations for carbon accounting of bamboo forest | | Sector / Industry | Forestry Industry Standard (Recommended) | | Classification of Chinese Standard | B60 | | Classification of International Standard | 65.020.40 | | Word Count Estimation | 9,928 | | Date of Issue | 2020-03-30 | | Date of Implementation | 2020-10-01 | | Regulation (derived from) | Announcement No. 6 of 2020 by the State Forestry and Grassland Bureau | | Issuing agency(ies) | State Forestry and Grassland Administration | LY/T 3196-2020: Technical regulations for carbon accounting of bamboo forest---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.
Technical regulations for carbon accounting of bamboo forest
ICS 65.020.40
B 60
People's Republic of China Forestry Industry Standard
LY
Bamboo forest carbon metering regulations
2020-03-30 released
2020-10-01 implementation
Issued by the State Forestry and Grassland Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed and managed by the National Bamboo and Rattan Standardization Technical Committee (SAC/TC263).
Drafting organizations of this standard. International Center for Bamboo and Rattan, Department of Ecological Protection and Restoration, National Forestry and Grassland Administration, Forest Health
State Environment and Protection Research Institute, Chinese Academy of Forestry Research Institute.
The main drafters of this standard. Liu Shirong, Shi Lei, Zhang Guobin, Fan Shaohui, Luan Junwei, Zhang Lei, Wang Yi.
Bamboo forest carbon metering regulations
1 Scope
This standard specifies the terms, definitions and measurement methods for bamboo forest carbon measurement.
This standard is applicable to the measurement of carbon storage of natural distribution and artificially cultivated bamboo forests.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version is suitable
Used in this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 26423-2010 Terminology of Forest Resources
LY/T 2258-2014 Standing wood biomass modeling method technical specifications
LY/T 2259-2014 Standing wood biomass modeling sample collection technical specifications
LY/T 2988-2018 Guidelines for Measuring Carbon Storage of Forest Ecosystems
QX/T 188-2013 Technical Guidelines for Vegetation Monitoring by Satellite Remote Sensing
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Bamboo forest
A forest with bamboo with an average diameter at breast height not less than 2 cm and an average height not less than 2 m as the main component.
3.2
Single ramet
Ramets
Scattered, clumped, or mixed bamboo is a single standing bamboo that grows in solid or cloned.
3.3
Stand
Forest plots that have the same or similar internal forestry characteristics and are significantly different from the surrounding adjacent plots.
[GB/T 26423-2010, definition 2.4]
3.4
Large sized monopodial bamboo
Under normal growth conditions, standing bamboos are uniaxial scattered bamboo species with an average DBH of 8 cm or more and an average height of 10 m or more.
3.5
Medium sized monopodial bamboo
Under normal growth conditions, standing bamboos have an average DBH of 3 cm to 8 cm and an average height of more than 6 m.
3.6
Small sized monopodial bamboo
Under normal growth conditions, the average DBH of standing bamboo is less than 3 cm and the average height is more than 2 m uniaxial scattered bamboo species.
3.7
Large sized sympodial bamboo
Under normal growth conditions, standing bamboos have an average DBH of more than 10 cm and an average height of more than 10 m.
3.8
Medium sized sympodial bamboo
Under normal growth conditions, standing bamboos have an average DBH of 5 cm to 10 cm and an average height of 6 m or more.
3.9
Small sized sympodial bamboo
Under normal growth conditions, the average DBH of standing bamboo is less than 5 cm and the average height is more than 2 m.
3.10
Canopy layer of bamboo forest
Located at the top level of the forest, is a layer made up of bamboo canopy.
3.11
Carbon pool
During the carbon cycle, forest ecosystems store various components of carbon. Including living biomass above ground and living below ground
There are five parts. quality, litter, dead wood and soil organic carbon.
[LY/T 2988-2018, definition 3.2]
3.12
Bamboo forest carbon stock
The storage of organic carbon in each carbon pool of the bamboo forest ecosystem.
3.13
Vegetation index
Linear or non-linear combination of satellites in different bands to reflect the quantitative information of plant growth.
[QX/T 188-2013, definition 2.3]
4 Measuring method of bamboo forest carbon storage
4.1 Preparation
In accordance with the provisions of Chapter 4 of LY/T 2259-2014.
4.2 Carbon storage measurement of individual standing bamboo
4.2.1 Standard bamboo biomass modeling sample collection
According to LY/T 2259-2014, 5.7.
4.2.2 Modeling method of standard bamboo biomass
4.2.2.1 Modeling method of standard bamboo on-ground biomass
In accordance with the provisions of Chapter 6 of LY/T 2258-2014.
4.2.2.2 Modeling method of standard bamboo underground biomass
In accordance with the provisions of Chapter 8 of LY/T 2258-2014.
4.2.3 Biomass measurement of standing bamboo
Substitute the diameter at breast height (and bamboo height, age) of standing bamboo into the model established in 4.2.2 to measure the biomass of standing bamboo.
4.2.4 Lizhu's carbon storage measurement
The carbon storage of Lizhu is calculated according to formula (1).
C individual plant = B individual plant CC (1)
Where.
C Individual plant-the carbon storage of standing bamboo (tC);
B Individual plant-the biomass of standing bamboo (t);
CC--The carbon content in standing bamboo biomass, dimensionless.
4.3 Carbon measurement at the stand level of bamboo forests
4.3.1 Principles of carbon storage measurement
To ensure the accuracy requirements of carbon storage measurement, the method of stratified sampling (classified sampling) should be used to investigate the carbon storage of forests.
Bank, which is based on the principle that the main attributes of the forest stand (tree species composition, plant number density, diameter at breast height, bamboo height, etc.) are the same or relatively consistent.
Line layered measurement. During the investigation, the data of each wooden ruler is recorded in Appendix A.
4.3.2 Quadrat setting
4.3.2.1 Arbor layer
Set up quadrats in layers, 3~5 quadrats in each layer, and the distance between the quadrats is not less than 1 km. According to the dominant bamboo species
Characteristics, the size requirements of the plots for different bamboo forest types are as follows.
The area of the large-diameter scattered bamboo and bamboo plots shall not be less than 400 m2; the medium-diameter scattered bamboo and bamboo plots shall not be less than 100 m2, and
The number of plants in the plot is not less than 30; the plot area of the small-diameter scattered bamboo forest is not less than 25 m2, and the number of plants in the plot is not less than 30
Strain.
The area of the large-diameter clustered bamboo forest plot is not less than 900 m2 or contains more than 30 clusters and the number of standing bamboos is not less than 150.
The plot area of the middle-diameter clustered bamboo forest is not less than 400 m2 or contains more than 30 clusters and the number of standing bamboos is not less than.200.
The plot area of the small diameter clustered bamboo forest is not less than 100 m2 or contains more than 30 clusters and the number of standing bamboos is not less than 300.
product.
The square size of mixed bamboo and bamboo forests, refer to scattered bamboo and bamboo forests.
The shape of the sample should be set as a square or rectangle.
4.3.2.2 Shrub layer
In each arbor layer sample plot, at least 3 plots are randomly set up, and the area of each plot is not less than 25 m2.
4.3.2.3 Herb layer
In each arbor layer sample plot, at least 3 plots were randomly set up, and the area of each plot was not less than 1 m2.
4.3.2.4 Litter layer
In each arbor layer sample plot, set up 5 litter collection boxes in the middle of the sample square and at the intersection of the diagonals. Each collection box
The area is 0.5 m2~1 m2.
4.3.2.5 Dead wood layer
In each arbor layer sample plot, 3 small plots are randomly set, and the area of each plot is not less than 1 m2.
4.3.3 Measurement of bamboo forest stand level biomass carbon storage
4.3.3.1 Arbor layer
In accordance with the provisions of 5.1.1 and 5.2.1 of LY/T 2988-2018.
4.3.3.2 Shrub layer
In accordance with the provisions of 5.1.2 and 5.2.2 of LY/T 2988-2018.
4.3.3.3 Herb layer
In accordance with the provisions of 5.1.3 and 5.2.3 of LY/T 2988-2018.
4.3.4 Measurement of litter carbon storage
According to the regulations of 5.3 of LY/T 2988-2018.
4.3.5 Measurement of carbon storage of dead wood
In accordance with the provisions of 5.4 of LY/T 2988-2018.
4.3.6 Measurement of soil carbon storage
In accordance with the provisions of 5.5 of LY/T 2988-2018.
4.3.7 Measurement of carbon storage of bamboo forest ecosystem
The carbon storage of bamboo forest ecosystem is the biomass carbon storage of bamboo forest trees, shrubs and herb layers and litter, dead wood and soil
The sum of soil carbon storage is calculated according to formula (2).
4.4 Measurement of carbon storage in bamboo forests above the stand scale
4.4.1 Satellite data acquisition and vegetation index calculation
In accordance with the provisions of QX/T 188.
4.4.2 Establish a remote sensing inversion model of biomass
Use the remote sensing vegetation index matching the carbon storage density in 4.3 with its geographic location to establish a remote sensing response to bamboo forest carbon storage
Model and fit according to formula (4).
4.4.3 Retrieval of bamboo forest biomass density and carbon storage measurement of the entire area grid (pixel)
Using the inversion model established in 4.4.2, combined with the need to measure the vegetation index of each grid (pixel) of the bamboo forest
According to the data, the bamboo forest carbon storage density of each grid (pixel) in the entire area is inverted, and the whole area is measured according to formula (5) and formula (6).
Carbon storage of each pixel in each region.
4.4.4 Analysis of the degree of spatial variability (spatial autocorrelation) of carbon storage
Based on the bamboo forest carbon storage of each pixel retrieved in 4.4.3, a semivariogram model of bamboo forest carbon storage is established, and
It must reflect the degree of spatial variability of carbon storage--variation range.
4.4.5 Resampling to obtain bamboo forest carbon storage above the stand scale
In the variable range of carbon density spatial autocorrelation, the inverted carbon storage is resampled to obtain the bamboo forests of the scale above the stand.
Carbon storage. The spatial resolution of the resampled bamboo forest carbon storage must be smaller than the variable range.
Appendix A
(Informative appendix)
Survey table for each bamboo inspection ruler
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