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A Method and System for Estimating Farmland Soil Organic Carbon Storage Combining Model and Time-series Sampling

An organic carbon and soil technology, which is applied in the fields of calculation, measurement device, soil material testing, etc., can solve the problems of difficult to obtain spatial data sets of land use change, difficult to obtain model parameters of special crops, and deviation of simulation results, etc. Improved accuracy and scientificity, ease of implementation, cost-saving effects

Active Publication Date: 2022-06-03
JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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  • Application Information

AI Technical Summary

Problems solved by technology

Many studies have verified the reliability of model estimation results in regions with little land use change. However, due to many reasons such as the difficulty of obtaining spatial datasets of land use change and model parameters of special crops, the use of process-based Effects of land use change are usually neglected during the estimation of regional-scale soil organic carbon stocks and their changes by ecosystem models
Due to the significant impact of land use change on soil organic carbon, the simulation results may be biased when the model is applied to regions with large land use changes

Method used

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  • A Method and System for Estimating Farmland Soil Organic Carbon Storage Combining Model and Time-series Sampling

Examples

Experimental program
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Embodiment 1

[0037] This example takes the estimation of the dynamic changes of soil organic carbon storage in the agricultural land in Lanling County, Shandong Province from 1980 to 2008 as an example.

[0038] figure 1 It is a schematic flow chart of the method applied in an example; the estimation method includes the following steps:

[0039] Step 01 Land use change area division

[0040] According to the existing agricultural land use map, field survey or yearbook data, the agricultural land in Lanling County is divided into areas with unchanged land use patterns (wheat-corn rotation area) and land use patterns according to the changes in land use patterns from 1980 to 2008. changing area (vegetable growing area), figure 2 The schematic diagram of the wheat-corn rotation area and vegetable planting area is shown. Before 1980, Lanling County used the wheat-corn rotation as the main land use method. Since 1980, the vegetable planting area has increased rapidly year by year, and the ar...

Embodiment 2

[0055] The farmland soil organic carbon storage estimation system combining model and time-series sampling in this embodiment includes a first module, a second module, a third module and a fourth module; with the agricultural land in Lanling County, Shandong Province in Example 1 at the time of Take the dynamic changes of soil organic carbon storage from 1980 to 2008 as an example.

[0056] The first module is mainly used for regional division, and the farmland of the target area is divided into the land use mode change area, and in the time period 1 1 to I n Within the area, the farmland is divided into the land-use-unchanged area N and the land-use-change area C;

[0057] The second module simulates by combining the model, calculates the soil organic carbon storage in area N and area C without considering the land use change, and sends the calculated value to the fourth module;

[0058] The third module is used to calculate the actual soil organic carbon storage in the are...

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Abstract

The invention discloses a method and system for estimating farmland soil organic carbon storage combined with models and time-series sampling. Target areas are classified and divided, combined with model simulation to obtain soil organic carbon storage without considering changes in land use patterns, and then through time-series sampling, Calculate the actual soil organic carbon storage considering the change of land use mode; the present invention can more efficiently estimate the dynamic change of soil organic carbon storage in areas with large changes in land use mode by combining the two methods of model and time series sampling.

Description

technical field [0001] The invention relates to a method and system for estimating farmland soil organic carbon storage, in particular to a method and system for estimating farmland soil organic carbon storage by combining model and time series sampling. Background technique [0002] Agro-ecosystems sequester soil organic carbon, which not only helps to improve soil fertility, but also alleviates climate change problems caused by greenhouse gas emissions. Accurate estimation of soil organic carbon storage in agricultural land at the regional scale can provide effective data support for decision-makers. Many factors at the regional scale, including climate, land use, soil properties, and land management practices, work together to influence changes in soil organic carbon. Among them, changes in agricultural land use patterns have a significant impact on the content and distribution of organic carbon pools. Accurately estimating the dynamic changes of soil organic carbon sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G06Q10/04G06Q50/02
CPCG01N33/24G06Q10/04G06Q50/02G01N33/245Y02P90/84
Inventor 刘晓宇陈寅冯祥严方刘杨
Owner JIANGSU POLYTECHNIC COLLEGE OF AGRI & FORESTRY
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