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Farmland soil organic carbon reserve estimation method and system in combination with model and time sequence sampling

An organic carbon and soil technology, applied in the field of soil organic carbon storage estimation in farmland, can solve the problems of difficulty in obtaining model parameters for special crops, deviations in simulation results, and difficulty in obtaining spatial data sets of land use changes, etc., to achieve easy implementation, The effect of saving cost, improving accuracy and scientificity

Active Publication Date: 2020-06-16
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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  • Farmland soil organic carbon reserve estimation method and system in combination with model and time sequence sampling
  • Farmland soil organic carbon reserve estimation method and system in combination with model and time sequence sampling
  • Farmland soil organic carbon reserve estimation method and system in combination with model and time sequence sampling

Examples

Experimental program
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Effect test

Embodiment 1

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

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

[0039] Step 01 Regional division of land use change

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

Embodiment 2

[0055] The farmland soil organic carbon storage estimation system combining model and time-series sampling of the present embodiment includes the first module, the second module, the third module and the fourth module; The dynamic change 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 in the target area is divided into areas of land use change. 1 to I n Within , the farmland is divided into the area N where the land use mode has not changed and the area C where the land use mode has changed;

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

[0058] The third module is used to calculate the actual soil organic carbon storage in area C after considering the change of land use mode based on the results o...

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Abstract

The invention discloses a farmland soil organic carbon reserve estimation method and system in combination with model and time sequence sampling. A target area is classified and divided, model simulation is combined to obtain soil organic carbon reserves without considering land utilization mode changes, and then through time sequence sampling, an actual soil organic carbon reserve after considering the land utilization mode change is calculated and obtained. By combining the model method and the time sequence sampling method, the dynamic change of the soil organic carbon reserve can be more efficiently estimated in areas with large land utilization mode change.

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 combined with models and time-series sampling. Background technique [0002] The sequestration of soil organic carbon by agro-ecosystems can not only improve soil fertility, but also alleviate climate change caused by greenhouse gas emissions. Accurately estimating soil organic carbon stocks 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 patterns, soil properties, and land management practices, collectively affect changes in soil organic carbon. Among them, the change of agricultural land use pattern has a significant impact on the content and distribution of organic carbon pool. Accurately estimating the dynamic changes of soil organic carbon stocks in...

Claims

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Application Information

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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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