A Smart System for Prevention and Control of Nitrogen and Phosphorus Loss in Shallow Water Wetlands

Abstract

The invention provides an intelligent paddy field surface shallow-water wetland system capable of preventing and controlling nitrogen and phosphorus loss. The system comprises a central control system, a pump station, an irrigation system, a paddy field and a water level regulating gate, wherein the central control system comprises a data acquisition and analysis module, a control base station and a signal receiver; the data acquisition and analysis module comprehensively analyzes water and fertilizer management and a growth stage of aquatic crops determines field surface water level, transmits the information to the pump station and the water level regulating gate, controls start and stop of a water pump at the pump station and regulates the water level of the water level regulating gate; the data acquisition and analysis module reduce the water level of the paddy field in advance before rainfall through combination with weather forecast, and the system produces passive drainage as little as possible; when active drainage is required, water retention time in the field is ensured not to be shorter than required time, so that flow out of a large amount of tail water containing high-concentration nitrogen and phosphorus can be avoided. By means of absorption and purification of nitrogen and phosphorus by the field, agricultural non-point pollutants are discharged out of the area to the smallest extent on the premise that stable and high yield of crops is guaranteed.

Description

technical field [0001] The present invention relates to a shallow water wetland system on the surface of the water farming field, in particular to an intelligent shallow water wetland system on the surface of the water farming field which is beneficial to preventing and controlling the loss of nitrogen and phosphorus in farmland and non-point source pollution. Background technique [0002] With the gradual and effective control of point source pollution, the pollution contribution of agricultural non-point source pollution to the water environment has increased year by year. Agricultural non-point source pollution has the characteristics of "large randomness and complex influencing factors; wide distribution and far-reaching influence; complex formation process and vague mechanism; long latent period and great harm", which leads to the monitoring and control of agricultural non-point source pollution. It is relatively difficult, and the environmental problems caused by its l...

AI Technical Summary

Problems solved by technology

[0007] The above patents are all outside the field, using farmland ditches, ponds or newly built ecological treatment facilities, etc. to carry out ecological treatment of farmland tail water, but using the farmland itself to absorb and purify nitrogen and phosphorus, under the premise of ensuring stable and high yield of crops The process and technology to achieve the minimum discharge of agricultural non-point source pollutants outside the region have not yet been involved

Images