Rice-fish-shrimp circular planting and breeding system and rice-fish-shrimp planting and breeding method

Abstract

The invention discloses a rice-fish-shrimp circular planting and breeding system. A pond is divided by the system into a culture zone, a smooth water zone, a field board and an open water buffer zone,wherein the culture zone comprises a plurality of longitudinally parallel culture water tanks, the smooth water zone is located at a water outlet end of the culture zone, and the pond bottom of the smooth water zone is lower than the bottom of the culture zone; the open water buffer zone is located at a water inlet end of the culture zone, and the pond bottom of the open water buffer zone is lower than the bottom of the culture zone; the field board is U-shaped surrounding the culture zone, the smooth water zone and the open water buffer zone, and a circular ditch is dug on the edge of a field parcel along the pond bank; a first water isolation belt is arranged to divide the field parcel into a rice-shrimp planting and breeding zone and an ecological purification zone; a second water isolation belt is arranged from the water inlet end of the culture zone far away from the bank end of the pond in the water flow direction to enable water to flow circularly in an O shape along the culture zone, the smooth water zone, the rice-shrimp planting and breeding zone, the ecological purification zone and the open water buffer zone. The problems about treatment of high-density culture waste and fertilization of a comprehensive rice field planting and breeding system are solved, and efficient utilization of system resources and zero emission of tail water and waste are realized.

Description

technical field [0001] The invention belongs to the field of aquaculture, and relates to a rice-fishing-shrimp circular planting system and a rice-fishing-shrimp planting method. Background technique [0002] The main methods of aquaculture in my country include pond culture, cage culture, large water surface culture, and factory (facility) culture. Existing aquaculture models still have varying degrees of problems in the effective use of water resources, land (water) resources, and feed resources, as well as in resisting environmental impacts and affecting the environment. The extensive growth mode has faced greater challenges. Environmental, policy, social and other pressures urgently require the implementation of necessary changes. [0003] Problems in pond culture: [0004] (1) Lack of fine breeds [0005] At present, most aquaculture species are wild types that have not undergone genetic improvement through the process of domestication, and have strong adaptability t...

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Problems solved by technology

[0006] (2) The environmental load of fishery waters has intensified

The high-density aquaculture tank of this system is a basic frame composed of ferrochrome gas welding connections. Polyethylene canvas is laid on the bottom surface and the left and right sides of the basic frame. Although the cost of polyethylene canvas is low, it is easy to age and has a limited service life. ;In addition, the system is equipped with a 2.2kW submersible water pushing aerator outside the water inlet of each tank to push the water flow. The energy consumption is high and the water flow efficiency is relatively low. It is easy to deposit residual bait and water on the surface of the polyethylene canvas. Excreta, affecting the water quality in the tank

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