Method for planting grass at bottom of pool to cultivate loach fries

Abstract

The invention discloses a method for planting grass at the bottom of a pool to cultivate loach fries. Methods of interval sowing at the bottom of the pool and step-by-step barnyard grass submergence are utilized to cultivate bait of the loach fries step by step, and attachments are provided for the loach fries at the same time, and the breeding environment change and fry growth need to be synchronously conducted. The method mainly includes the steps that the loach fry cultivation pool which is suitable for grass planting is selected; 40-50 days before the loach fries are placed into the pool, barnyard grass seeds are sown at the bottom of the pool at intervals block by block, the sowing area accounts for 50-60% of the area of the bottom of the pool, and the sowing amount is 1.5 kilograms / 667 square meters; 10 days before the loach fries are placed into the pool, 50cm fresh water is added to the pool for barnyard grass submergence, and quick lime is placed into water for sterilization and promoting barnyard grass to be decomposed to cultivate protozoa and rotifers; 150,000-20,000 loach (fries) sprays are placed into the pool per 667 square meters; step-by-step watering adding and barnyard grass submergence are conducted, namely, after the loach fries are placed into the pool for 5-7 days, 20cm fresh water is added according to the water color condition of the pool, after the loach fries are placed into the pool for about 15 days, 20cm fresh water is added again, and after about 10 days, the barnyard grass is decomposed, the loach fries grow into 4-5cm large-size fish fries, and then the adult loach feeding stage is conducted.

Description

technical field [0001] The invention belongs to the field of aquaculture. Specifically relates to a method for cultivating loach seedlings by planting grass at the bottom of a pond. Background of the invention [0002] Loach is a traditional high-quality aquatic product in my country, known as ginseng in water. With the improvement of people's living standards, the market demand is increasing, wild products are far from meeting the market demand, and the market prospect is broad. In recent years, artificial breeding has been carried out all over the country, and the development momentum is strong, but the large-scale supply of large-scale seed has become a bottleneck. The main reason is the special living habits of loach. (1) Although loach belongs to Cyprinidae fish with a large amount of eggs and relatively easy artificial reproduction, there is a special stage of external gills after the larvae are moulded, at which time the gill filaments are exposed, the gill cover c...

AI Technical Summary

Problems solved by technology

(1) Although loach belongs to Cyprinidae fish, with a large amount of eggs and relatively easy artificial reproduction, there is a special stage of external gills after the larvae are moulded. At this time, the gill filaments are exposed, the gill cover cannot be closed, and the respiratory efficiency is reduced; Gill filaments are delicate and vulnerable to damage; (2) Loach seedlings have adherents, which require attachments in the early stage of cultivation, and they are easy to sink into the surface silt at the bottom of the pond during pond cultivation, resulting in mass suffocation and death; (3) Loach seedlings open When the mouth is small, the quantity and specifications of the bait are high; (4) The loach seedlings have a lot of mucus on the skin, which causes the loach seedlings to be greatly affected by the air bubbles in the water body, and they are easy to passively float and cause mass death; (5) Loach seedlings 20-30 days after demembrane, start to swallow intestinal breathing to assist breathing

Because the traditional loach seed cultivation does not carry out production according to the above growth characteristics of loach seedlings, the survival rate of seed cultivation is only 5-10%

[0003] Many places in our country have summed up the method of planting grass at the bottom of the pond, submerging green manure and water to raise fish species such as the four big family carp, but the traditional pond bottom planting grass cultivation technology is directly applied to the cultivation of loach seedlings, and there are the following main problems: (1) the whole pond bottom planting Green; (2) one-time drowning

As a result, the water quality in the early stage is too fertile, which is particularly likely to cause serious consequences such as hypoxia or even pond flooding. At the same time, there is also a waste of nutrients in the early stage, thin water quality in the later stage, and insufficient bait that affects the normal growth of seedlings and other adverse consequences.