Method and device for estimating nitrous oxide greenhouse gas emission of soil in farmland

Abstract

The invention discloses a method and a device for estimating nitrous oxide greenhouse gas emission of soil in a farmland. The method comprises the following steps: S1, running an SWAT(Soil and Water Assessment Tool) semi-distributed hydrologic model, and performing simulation to acquire soil environment parameters of different space positions; S2, building physical and chemical properties of the soil and corresponding N2O emission amount database through documents and collection of measured data, and building a nonlinear model of the N2O emission amount of the soil and the soil environment parameters; S3, coupling the parameters in the step S1 with the nonlinear model in the step S2 by using Python language, and dynamically calculating the N2O emission flux of the soil in the whole basin;S4, realizing automatic presentation of N2O emission spatial-temporal change by using the Python language; and S5, realizing automatic comparison and analysis on the N2O emission of the soil under different scenes by using the Python language. According to the method disclosed by the invention, the precision calculation is ensured, and emission of the N2O of the soil in the whole basin can be quickly and effectively estimated.

Description

technical field [0001] The invention belongs to the technical field of soil nitrogen loss simulation, and relates to a simple and quick method and device for estimating agricultural non-point source nitrogen loss, in particular to a method and device for estimating nitrous oxide greenhouse gas emissions from farmland soil. Background technique [0002] Soil N 2 Excessive discharge of O can cause soil nitrogen loss and cause serious pollution to the atmospheric environment. What is currently known about soil N 2 The production process of O mainly includes: nitrification and denitrification microbial processes, etc. This process is mainly affected by factors such as soil temperature, water content, and soil nitrogen content. Climate, soil physical and chemical properties, and agricultural management measures can affect soil N alone or interact together. 2 O emission, resulting in soil N 2 O emissions have complex emission patterns and large spatiotemporal variability. For...

AI Technical Summary

Problems solved by technology

However, the mechanism model is often difficult to operate due to the large number of parameters required and the long-term measured values

[0005] To sum up, the single statistical model or the mechanism process model has the problem of large uncertainty of the statistical model and the problem of the verification of the mechanism process model that requires a large amount of measured data. These two types of models have their own advantages and disadvantages. How to effectively integrate various Advantages of the method, fast and effective realization of soil N in the whole watershed 2 O emission simulation has become one of the technical problems to be solved urgently by those skilled in the art

Images