CATDOLL : CATDOLL: What is the proportion of grass carp and silver carp cultured in a 4-acre, 2-meter-deep fish pond?

What is the proportion of grass carp and silver carp mainly cultivated in a 4-acre, 2-meter-deep fish pond?

There are two methods for fish farming in ponds: "sparse and extensive farming" and "intensive and dense farming".

(1) Sparse and extensive stocking is a method of stocking fish using only natural bait in the pond. The stocking density and proportion are mainly determined by the nutrient type of the pond.

Located in the plains, with large catchment areas and abundant natural bait, eutrophic ponds can stock 15 to 22.5 fish of 12 to 13 cm in diameter per 100 square meters of water surface each year, with a mix of 50% bighead carp, 45% silver carp, and 5% grass carp, bream, carp, etc. If such ponds are carefully managed, the annual commercial fish production can reach 7.5 kg per 100 square meters of water surface.

In a general nutrient pond located in a hilly area with a medium catchment area and abundant natural bait, 10 to 15 fish of 12 to 13 cm in size can be stocked per 100 square meters of water surface each year, with a mix of 50% to 60% bighead carp, 30% to 45% silver carp, and 5% to 10% grass carp, bream, carp, etc. The commercial fish output of this type of pond can reach 4 to 5.5 kg per 100 square meters of water surface.

Oligotrophic ponds located in valleys with small catchment areas and lack of natural bait can stock 7.5 fish of 12-13 cm per 100 square meters of water surface each year, with a mix of 60% bighead carp, 30% silver carp, and 10% grass carp, bream, carp, etc. The commercial fish production of such ponds can reach 2.2-3.0 kg per 100 square meters of water surface.

(2) Intensive breeding and dense stocking This type of stocking is suitable for ponds with an area of ​​less than 6.67×10,000 square meters and an easily controlled breeding environment. The stocking density and matching ratio can be determined according to the nutrient type, fertilization, feeding and management level of the pond. In a nutrient-rich pond with sufficient feed, 30 fish of 12 to 13 cm in diameter can be stocked per 100 square meters of water surface each year, with a matching ratio of 50% silver carp, 30% bighead carp, 15% grass carp, and 5% carp, crucian carp, bream, etc.

For ponds with general trophic and oligotrophic properties and sufficient green bait, 22.5 to 30 fish of 12 to 13 cm in size can be stocked per 100 square meters of water surface each year, with the ratio of grass carp 65% to 70%, bighead carp 15%, silver carp 10%, and carp, bream, crucian carp, etc. 5%.

What do grass carp and silver carp eat when they are young?

When they grow to about 2 cm, they begin to differentiate, and black carp and silver carp start to feed on zooplankton, mainly cladocerans, copepods, rotifers, etc.

At this time, grass carp begins to ingest organic matter in the water, while silver carp mainly filters algae.

After the summer flowers, they are basically fed with pellet feed, including powder, sinking pellets, expanded feed, etc. The main domestic feeds are: Tongwei, Haida, New Hope, Zhengda, Liuhe (currently integrated by New Hope), Zhenghong, and local feed mills such as Zhengbang, Dajiang, Sihai, Yuehai, Haixin, Haima, Tianma, Shuangbao, Tieqi Lishi, etc. You can ask the local dealer, who will recommend you the corresponding complete feed.