Ecological interception and blocking system for controlling non-point source pollution of rice field

Abstract

The invention discloses an ecological interception and blocking system for controlling non-point source pollution of a rice field. The ecological interception and blocking system is characterized by comprising an ecological ditch and a rice field wet land, wherein the ecological ditch consists of ditch side walls and a ditch bottom, the cross section in the width direction of the ditch is a trapezoid with a longer upper side and a shorter bottom side, the ditch walls and the ditch bottom are formed by splicing regularly hexagonal brick holes, ditch body green plants are distributed on the ditch walls, and an emergent aquatic plant is distributed at the ditch bottom; the rice field wet land is constructed at the tail end of a rice field drainage, the soil surface of the rice field wet land is lower than the surface of a normal rice field, rice seedling is planted in the rice field wet land, water flowing through the rice field and the ecological ditch from upstream is used as irrigation water and a fertilizer source. Not only can the plant diversity and ornamental value of the rice field system be enhanced, but also the risk that the rice field can possibly cause agricultural non-point source pollution can be lightened, the utilization rate of nitrogen and phosphorus in the rice field can be improved.

Description

technical field [0001] The invention belongs to the technical field of non-point source pollution control, and relates to an ecological blocking system for controlling agricultural non-point source pollution and improving the utilization rate of nitrogen and phosphorus in paddy fields. Background technique [0002] In our country, in order to pursue high yields, farmers often use excessive chemical fertilizers. Excessive chemical fertilizer input has impacted the farmland ecosystem, causing the proportion of agricultural non-point source pollution load to increase year by year, becoming one of the main sources of water pollution. [0003] At present, some patent achievements on effective control of agricultural non-point source pollution have been published. For example, CN1951837A discloses a method for purifying ecological ditch sewage, which mainly performs mixed treatment on urban domestic sewage and farmland drainage, and flows through coarse grids, grit chambers, fine...

AI Technical Summary

Problems solved by technology

However, there are few reports on the application of wetlands in the control of non-point source pollution in paddy fields.

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