A device and simulation method for simulating the migration and transformation process of pesticides in paddy field water and soil systems

Abstract

The invention provides a device for simulating the migration and transformation process of pesticides in the paddy field water and soil system, including a water supply tank, a pesticide migration experiment column, a soil interstitial water collection system, a filtrate collection system, and a multi-layer support platform; the water supply tank and the pesticide migration experiment column are installed On the support platform, the pesticide migration experiment column is connected with the water supply tank through a hose connection device, which is connected with the columnar filtering device of the filtrate collection system through a threaded connection device; the soil interstitial water collection system consists of a soil interstitial water collection pipe and a soil It consists of a gap water collector, and the side wall of the soil gap water collection pipe is provided with a gap water inlet; the filtrate collection system also includes a filtrate collector. The invention also discloses a simulation method of the above-mentioned device. The device can simulate the migration and transformation behavior of pesticides in the paddy field water and soil system in the hydrodynamic process of "irrigation→drying→...→irrigation→drying". The experimental results are more accurate, which is conducive to the accurate collection of pesticides in the filtrate.

Description

technical field [0001] The invention relates to an experimental simulation device for the migration and transformation of pesticides, belonging to the field of environmental protection, in particular to a device for simulating the migration and transformation process of pesticides in paddy field water and soil systems and a simulation method thereof. Background technique [0002] my country is a large agricultural country. Rice is the grain crop with the largest planting area in my country, and its sowing area accounts for about 26.9% of the national grain planting area. In the process of rice growth and cultivation, the application of pesticides to control diseases, insect pests and weeds is an important means to ensure stable, high and excellent yield of rice. However, due to the potential persistence, toxicity and bioaccumulation of most pesticides, the harm to the environment and organisms is increasing day by day while the pesticides bring us economic benefits. [0003...

AI Technical Summary

Problems solved by technology

Most of the existing devices are relatively simple, and the migration and transformation simulation of pesticides is not accurate enough

For example, it is difficult to accurately simulate the hydrodynamic process of "irrigation→drainage→...→irrigation→drainage" in the paddy field water and soil system; the existing devices generally only have one experimental column for pollutant migration, and the experimental results obtained are not accurate enough ; During the experiment, the existing device cannot accurately take soil samples and interstitial water samples in different layers. The experimental results are affected by the side wall effect, and the error is relatively large; the collection of pesticides in the filtrate is not accurate enough, etc.

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