First, pond disinfection and fertilizer cultivation "water spider"
"Water spider" is an important food for bamboo shell fish fry. Its abundance directly affects the survival rate of fry. The 15 days after hatching of shell fish fry is its critical period. During this period, whether the size of the opening bait is palatable and whether the supply is sufficient is the key to determining the survival rate of the seed. Use 50 kg of quick lime and 20 kg of tea seeds per acre for disinfection. The use of fermentation or dry chicken manure, pig manure and other poultry manure water can quickly develop a large number of water spiders. The specific method is to mix it with about 10% quicklime and put it into a 60 mesh bag (or feed bag, but To hang a number of small holes) and hang it around the fish ponds, generally two bags per mu. Sufficient zooplankton is the most effective guarantee for improving the survival rate of the seedlings. Of course, the most scientific method is to sprinkle water and microbial preparations, which not only have no pollution impact on water quality, but also can begin to produce a large number of biological feed.
Second, to cultivate a sufficient amount of pomace and other fish fry
"Making good fish, shrimp, and fattening bamboo shoots" means the importance of suitable live food. Use characteristics of fish shellfish fry of bamboo shoots larger than 1.5 cm in size, cultivating “fish fry†such as wheat bran, 3 to 4 days in advance, and stocking 80 to 100 times the number of fish fry in bamboo shoots; For the shellfish fry about 1/3 of the bait fish, the amount of bamboo shoots shellfish 40 to 50 times, to ensure that bamboo shoots fish fry have enough palatability bait fish to eat. In addition, depending on the amount of fry cultivation, ponds are also used to cultivate bait fish to ensure that there are sufficient palatable bait fish for fry and fingerlings during the entire fry cultivation period. The bait fish is generally supplemented once every 10 to 15 days.
Third, domesticated food
When shell shoots grow to 4 to 5 cm in length, they can start tame the artificial mixed feed. The mixed feed is mainly made of fish, adding the appropriate amount of carp feed, forming a paste, spreading all over the pond, and gradually attracting the feed basket. Feed baskets each 0.6 to 1.2 meters, feed baskets spaced about 2 meters, along the edge of the pond inside and outside the distribution of the second row. Feeding time is about 10:00 and 17:00, and the latter is mainly, accounting for 2/3 of the total. The daily feed amount is 15 to 20% of the fish's body weight.
Fourth, artificial feed feeding
The artificial feeds for the early period of cultivation are mainly fish gills, and 10% of clams are added to form pellets. In the later stage of cultivation, the fresh fish are cut into different size fish pieces according to the size of the mouth crack of the bamboo shell fish. The daily feed amount is 5 to 7% of the fish's body weight. According to the weather, fish diets increase or decrease. Feeding should be timed, positioned, qualitative, and quantitative.
Fifth, classification
For bamboo fish, below 6 cm belong to the period of seedlings, dominated by floating live prey. If the supply of live food in the pond at this time is insufficient, they can easily kill each other, resulting in a low survival rate and affecting the production of commercial fish in the later period. During the seedling period, if the conditions allow, the interval between sub-tanks can be shortened to 40 days, the effect will be better. When performing the sub-tank operation, sunny, early or cloudy days should be selected to avoid high temperature damage to the bamboo shell fish. In addition, since the shell fish need to be divided frequently, several ponds must be prepared to divide the fish of different sizes. At least three or more ponds should be prepared. If there are no more than one pond, we will not be able to grow bamboo shoots.
Sixth, water quality regulation
Polyculture specifications of approximately 400 to 600 fish per square meter per gram of tail fish. Pay attention to changes in water quality, such as the discovery of water quality deterioration should be replaced with new water, or use quicklime and the use of microbial agents, such as the use of photosynthetic bacteria to regulate water quality, maintain the pond water "fat, live, tender, cool." Keep the transparency of the pond about 30 cm. Pay attention to anti-escape. When water is added, use a nylon, nylon or Lux sieve sieve cloth with a mesh size of 0.5 to 0.6 mm at the inlet to prevent entry of predator organisms.
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