Blackfish and lotus root are polycultured together with a water depth of about 50cm How many tails c

Polyculture values are the highest.

Freshwater fish polyculture is a breeding method that increases the proportion of heterogeneous and heterogeneous fish polyculture year by year in the process of stocking fish fingerlings in reservoirs and ponds. Judging from the current fresh fish market, freshwater fish polyculture can bring good economic and social benefits. The benefits of freshwater fish polyculture are:

1) Make full use of water bodies.

The water bodies of reservoirs and ponds are three-dimensional spaces, especially ponds, most of which are small in size and shallow in depth, and generally only have the water layer area and the bottom area. When stocking fish fingerlings, according to the living habits of the farmed fish, the stocking ratio of various fish species and fish ages is reasonably matched to make the aquaculture water body present"The pond is like a building, and the layers of fish are wandering"The vivid and lively scene makes the water body fully utilized.

2) Extensive use of bait.

Freshwater fish feeds include natural feeds and artificial feeds. The natural bait in the water column is plankton, benthic animals, benthic algae and organic debris. Artificially fed feeds are animal feed and plant feed. In order to achieve the purpose of making full and reasonable use of natural bait in the water and improving the utilization rate of artificial feeding, it is necessary to breed all kinds of edible fish at the same time in the same water body, so as to ensure that all kinds of bait resources can be used by various living habits of fish, improve feed utilization rate, reduce costs and increase production.

3) Utilization of fish symbiosis.

Freshwater fish polyculture can be mainly grass carp, and also raise carp, silver carp, silver carp, crucian carp, tilapia, eel, turtle and other more than a dozen kinds of fish"Autologous fertilization"to get food. Since grass carp is the main food, the diet is mainly pasture. The grass carp eats the remaining debris to precipitate to the bottom of the water and become the bait for omnivorous fish such as carp and tilapia, while grass carp, crucian carp and tilapia continuously discharge feces, which increases the fertility of water quality, promotes the reproduction of plankton, and provides bait for silver carp and bighead carp.

Silver carp and bighead carp feed on plankton, which effectively prevents the water from being overfertile due to too much plankton, and provides a guarantee for the growth of grass carp. Yellow eel, soft-shelled turtle, etc. can loosen the bottom sediment during the breeding process, accelerate the decomposition of organic matter, and provide bait for fish.

4) Save breeding costs.

The pond of mixed adult fish, the implementation of different species and different age fish of different specifications of interculture, not only does not affect the growth of adult fish, but also expands the fish species, to a certain extent, to solve the problem of fish species, save the cost of seed purchase. Moreover, this kind of aquaculture does not need to increase the number of fingerling ponds and management personnel, saving land, labor and cost.

5) Good efficiency.

Freshwater fish polyculture has not only increased the average annual fish output by a large margin, but also significantly increased the number of fresh fish species on the market, and achieved good economic and social benefits.

It's best not to put blackfish, this water depth is not suitable for blackfish, and the water depth of blackfish is meters, and the lotus root is in the ground, and the light is not sufficient, and it is not suitable for blackfish to grow.

Black fish are resistant to low itching and can be raised. But the yield of the lotus root with a water depth of 50 will definitely not be good. The lotus root with black fish has a strong technical level,,, you can give it a try.