Pond fish farming generally adopts a polyculture model, which can be flexibly controlled according to specific local conditions. Generally, the following principles should be followed:
First, there are 1-2 kinds of main cultured fish in each polyculture model, and appropriate polyculture with some other fish.
Second, the ratio between filter-feeding fish and non-filter-feeding fish (commonly known as food-eating fish) should be appropriate. In the case of a net production of 500-1000 kilograms per mu, the ratio of the former to the latter is preferably 1:4 to 2:3.
3. The net production of sea bream and sea bream does not increase synchronously with the increase in the production of non-filtered fish. The net production per mu for sea bream and sea bream is 250-350 kg. The stocking ratio between sea bream and sea bream is 3 1:1 to 5:1.
Fourth, the ratio between the upper fish, middle fish and ground fish is preferably 4:3:3.
V. The adoption of the “old-mouth small size, large size sub-mouth†stocking method can reduce the amount of stocking and give full play to the potential of fish species to shorten the breeding cycle and increase fish production.
6. The production potential of carp, carp, and head lice is very high. Due to the small spacing between stocking specifications, statistical analysis shows that the increase in net production is related to the number of rearing fish. Therefore, in the case of out-of-tangling specifications, the number of stockings can be increased accordingly.
VII. The same amount of stocking, multiple types of polyculture (including the same kind of different specifications) than the type of less polyculture type, the system has strong elasticity, large buffering force, good complementarity, greater stability and high yield.
8. The stocking densities should be based on local feed, fertilizer supply, pond conditions, fish species conditions, water quality conditions, wheel rotation and management measures.
IX. In order to achieve a balanced listing of fish and fish products and improve social and economic benefits, a sufficient number of large-scale fish species should be provided for the release of the catcher at the beginning of the year for stocking and growth, and the seasons should be adjusted ahead of schedule and the rounds should be increased. Times, so that the amount of fish contained in the pond is always kept in the best condition.
Tenth, adult fish pond culture is an important measure to solve the large-scale species. The specifications of the out-of-pond fish stocks should be similar to those of the stocking at the beginning of the year, and their stocks should be equal to or slightly larger than the stocks of the fish stocks at the beginning of the year.
First, there are 1-2 kinds of main cultured fish in each polyculture model, and appropriate polyculture with some other fish.
Second, the ratio between filter-feeding fish and non-filter-feeding fish (commonly known as food-eating fish) should be appropriate. In the case of a net production of 500-1000 kilograms per mu, the ratio of the former to the latter is preferably 1:4 to 2:3.
3. The net production of sea bream and sea bream does not increase synchronously with the increase in the production of non-filtered fish. The net production per mu for sea bream and sea bream is 250-350 kg. The stocking ratio between sea bream and sea bream is 3 1:1 to 5:1.
Fourth, the ratio between the upper fish, middle fish and ground fish is preferably 4:3:3.
V. The adoption of the “old-mouth small size, large size sub-mouth†stocking method can reduce the amount of stocking and give full play to the potential of fish species to shorten the breeding cycle and increase fish production.
6. The production potential of carp, carp, and head lice is very high. Due to the small spacing between stocking specifications, statistical analysis shows that the increase in net production is related to the number of rearing fish. Therefore, in the case of out-of-tangling specifications, the number of stockings can be increased accordingly.
VII. The same amount of stocking, multiple types of polyculture (including the same kind of different specifications) than the type of less polyculture type, the system has strong elasticity, large buffering force, good complementarity, greater stability and high yield.
8. The stocking densities should be based on local feed, fertilizer supply, pond conditions, fish species conditions, water quality conditions, wheel rotation and management measures.
IX. In order to achieve a balanced listing of fish and fish products and improve social and economic benefits, a sufficient number of large-scale fish species should be provided for the release of the catcher at the beginning of the year for stocking and growth, and the seasons should be adjusted ahead of schedule and the rounds should be increased. Times, so that the amount of fish contained in the pond is always kept in the best condition.
Tenth, adult fish pond culture is an important measure to solve the large-scale species. The specifications of the out-of-pond fish stocks should be similar to those of the stocking at the beginning of the year, and their stocks should be equal to or slightly larger than the stocks of the fish stocks at the beginning of the year.
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