The six keys to fish farming must be noted:

Disinfecting ponds and fertilizing water to cultivate "water spiders"

Cultivating a sufficient amount of palatable fry such as pangolins

Taming the food

Artificial feed feeding

Grading

Water quality control

1. Pond disinfection and fertilization to cultivate "water spiders"

"Water spiders" are important bait for shootshell fish fry, and their abundance or lack of it directly affects the survival rate of the fry. The 15 days after the hatching of the fry is the critical period, during which the size of the open bait is suitable for the mouth and whether the supply is sufficient is the key to determine the survival rate of the fry. Disinfect with quicklime 50 kilograms per mu and tea seeds 20 kilograms per mu. Sterilization treatment at the same time using fermented or dried chicken manure, pig manure and other poultry manure fertilizer water can quickly cultivate a large number of water spiders, the specific method is to use about 10% of the quicklime mixed with 60 mesh bag (or feed bag, but to tie a number of small holes) hung around the fish pond, generally hanging 2 bags per acre can be. Enough zooplankton is the most effective guarantee to improve the survival rate of seedlings. Of course, the most scientific method is to splash fertilization of microbial preparations, which not only has no pollution impact on water quality, but also can begin to cultivate a large number of biological bait.

2. Cultivate a sufficient amount of palatable fish fry such as pangasius

"Raise a good small fish and shrimp, fertilization of bamboo shootshell fish" refers to the importance of palatable live bait. The use of more than 1.5 cm shootshell fish fry can feed on the characteristics of the domestic fish fry, 3 to 4 days in advance to cultivate pangasius and other "fish flower", stocking for the shootshell fish fry number of 80 to 100 times; or directly feed the whole length of the shootshell fish fry 1/3 of the bait fish, the number of the shootshell fish 40 to 50 times, to ensure that the shootshell fish fry have enough mouth-watering bait fish to eat. In addition, depending on the amount of fish fry cultivation separately arranged pond cultivation of bait fish, to ensure that the entire period of fish fry cultivation, there are sufficient palatable bait fish for fish fry, fish species to eat. The bait fish is usually replenished once every 10~15 days.

3. Tame food

Shot shell fish fry grow to 4~5 cm, you can begin to tame the artificial mixed feed, mixed feed to minced fish-based, add the appropriate amount of eel feed, into a paste, the whole pond spread, and gradually entice food on the feed basket. Feed basket each 0.6 ~ 1.2 meters, feed basket spacing of about 2 meters, along the pond inside and outside the distribution of two rows. Feeding time is about 10:00 and 17:00, the latter is the main, accounting for 2/3 of the total amount. 15-20% of the weight of the fish per day feeding.

4.? Artificial feed feeding

Artificial feed in the early stage of aquaculture is mainly minced fish, with 10% eel feed added to form a mass; in the late stage of aquaculture, according to the size of the mouth slit of the shoots of fish will be chilled fish cut into different sizes of fish pieces. The daily feeding amount is 5~7% of the fish weight. Depending on the weather, fish feeding increase or decrease. Feeding should be timed, positioned, quality and quantity.

5.? Grading

For shootshell fish, all below 6 centimeters belong to the juvenile stage, mainly swimming to feed on live bait. If the supply of live bait in the pond is insufficient at this time, it is very easy to kill each other, resulting in a low survival rate and affecting the production of commercial fish in the later stage. In the juvenile period, if conditions permit, the effect will be better if the interval between pond splitting can be shortened to 40 days. When performing pond splitting operation, the operation should be carried out in the morning, evening or cloudy day on a sunny day, so as to avoid the damage of high temperature to the shootshell fish. In addition, since shootshell fish require frequent pond splitting, it is necessary to prepare several ponds for splitting fish of different sizes. At least 3 or more ponds should be prepared, without more than one pond it is not good to raise shootshell fish.

6.? Water quality control

Mixed specifications of about 100 grams per tail of bighead carp per square meter 400~600 tails. Pay attention to the water quality changes, such as water quality is found to be bad should be added in a timely manner to replace the new water, or the application of quicklime and the use of microbial agents, such as the use of photosynthesizing bacteria, etc. to regulate the water quality, to maintain the pond water, "fertilizer, live, tender, cool. Keep the transparency of the pond water about 30 centimeters. Pay attention to the escape, add water in the water inlet with mesh size 0.5 ~ 0.6 mm polyamide, nylon or Rex sieve silk sieve cloth filtration, to prevent the entry of hostile organisms.