Home › Livestock Farming › Article

How to cultivate large-size fingerlings? Key measures to master

Livestock Farming 0 views
Fingerlings are the material basis for stable and high yield in adult fish production. Practice has proved that large-size fingerlings have stronger adaptability to the environment, ability to escape enemies, disease resistance and feeding ability, so the survival rate is high, the harvested size is large, and high yield can be achieved. To cultivate large-size fingerlings, in addition to carrying out feeding work such as "four fixed" feeding, "three looks" fertilizing, daily pond patrols and fish disease prevention and control, the following measures should also be taken: 1. Add fresh water to improve water quality. "When the water rises one cun, the fish grows three fen," "wide water raises big fish." During the rearing process

Fingerlings are the material basis for stable and high yield in adult fish production. Practice has proved that large-size fingerlings have stronger adaptability to the environment, ability to escape enemies, disease resistance and feeding ability, so the survival rate is high, the harvested size is large, and high yield can be achieved. To cultivate large-size fingerlings, in addition to carrying out feeding work such as "four fixed" feeding, "three looks" fertilizing, daily pond patrols and fish disease prevention and control, the following measures should also be taken:

1. Add fresh water to improve water quality. "When the water rises one cun, the fish grows three fen," "wide water raises big fish." During the rearing process, fresh water should be added frequently to adjust water quality, increase dissolved oxygen in the water, expand the activity space for fingerlings, and promote fingerling growth. This is the reasoning behind "live water makes fish grow." Generally, add water 2-3 times a month, each time to a depth of 0.7-1 cm.

2. Mixed culture and matching, reasonable sparse stocking. At the fingerling stage, mixed culture of varieties has a good effect, and mixed culture can make full use of water space and feed. For mixed culture and matching, fingerlings with different feeding habits and different activity water layers should be selected and raised together. For example, if mainly raising grass carp, 15-20% silver carp or bighead carp can be matched; if mainly raising silver carp or bighead carp, 10-30% grass carp can be matched. Reasonable sparse stocking is one of the important measures for cultivating plump and robust large-size fingerlings. Generally, 75,000-90,000 summer fry are stocked per hectare.

3. Timely screening, separate raising by size. During the fingerling rearing stage, fingerlings often grow at different rates, forming large "food-grabbing fry" and small "weak fry." Screening should be carried out, and they should be divided into ponds and raised separately, so that the size of fingerlings of the same type is basically consistent.

In summary, the key measures for cultivating large-size fingerlings can be summarized as the "five-five" rule, namely: raise 5,000 summer fry per mu, add fresh water 5 times, keep the pond water depth at 1.5 m, and after 5 months of rearing, produce 250 kg of large-size fingerlings of more than 16.5 cm per mu.

Related Articles