Method for biological repairing eutrophication of subtropical zone caltivate pond

Abstract

The invention is a bioremediation method of eutrophication in semi-tropical culture pond, relating to the cultivation of a kind of edible seaweed, especially the water cultivation on a raft frame for the bioremediation of the eutrophication. Its steps: selecting bioremediation plants and hanging and culturing them on the raft frame, where the initially hanging-culture density is less than 300 kg/mu; returning and replanting the collected seedling ropes, and then the culture density is less than 600 kg/mu. The bioremediation hanging culture raft is provided with at least 3 parallel-arranged poles, the end parts of these poles are connected by ropes or brackets into a frame boby, there are stakeropes between poles, and the frame body are provided with at least 2 supended bodies and fixed by at least four fixing ropes. It can adopt different bioremediation plants to implement annual continuous bioremediation. It can arbitrarily regulate underwater depth of the raft frame by the lengths of plastic foam stakeropes connecting the poles on the raft frame, thus applied to different-transparency water bodies in culture ponds. The adopted middle rope harvesting and seedling replanting method maintains a proper number of bioremendiaton plants in water body.

Description

technical field [0001] The invention relates to a method for seaweed cultivation, especially hydroponics on rafts, for subtropical pond eutrophication bioremediation. Background technique [0002] Mariculture is an important part of the economy of my country's coastal areas. However, the eutrophication caused by marine animal breeding in ponds leads to frequent occurrence of diseases and red tides, which not only pollutes the environment, but also endangers the breeding industry, causing heavy economic losses. Especially water hypoxia and NH 3 The harm of etc. is the most important problem that aquaculture ponds face. Use Gracilaria to absorb nutrients such as N and P in the water body, and at the same time release 02. Supply to farmed animals, which can inhibit the activity of anaerobic bacteria and reduce CH 4 、H 2 S, NH 3 Wait for the production of some toxic and harmful gases, create a good breeding environment, enhance the disease resistance of farmed animals, and ...

AI Technical Summary

Problems solved by technology

In the past, gracilaria was cultured in the form of bottom seeding, but for ponds with low water depth and water transparency, such as fish ponds, gracilaria grows slowly and cannot even survive due to weak light at the bottom

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