First, there are many ways to cultivate oysters. With the continuous development of oyster culture, new methods and technologies are constantly emerging. Among them, bamboo planting culture, bottom sowing culture, rock standing culture and hanging culture are more common. Among them, hanging net culture is divided into net type, rope type and raft type. No matter what kind of culture method or method, the key is to choose the culture site, which should be determined within its adaptive range according to the living habits of oysters and the requirements of oysters for environmental factors. In addition, the pollution degree of harmful industrial and agricultural wastewater should also be considered. Breeding and management of any variety is an important link. The management of vertical culture of oyster mainly includes: evacuating the culture density in time, adjusting the culture water layer, strengthening typhoon prevention, preventing sinking (raft) and so on.
Second, oysters and shrimps are mixed.
1. Selection of shrimp pond: The shrimp pond with mixed culture of oysters has a water depth of more than 1.3m and an average daily water exchange rate of about 50%, so silt or mud sand should be adopted. The transparency is controlled at 40-50 cm in the early stage and 50-60 cm in the middle and late stage.
2. Site layout: Before stocking the fry, thoroughly dredge the silt, and use bulldozers and other tools to flatten and compact the bottom of the pond where the oyster fry play, so as to make it slightly convex and slightly higher than the surrounding bottom, so as to prevent the oyster fry from sinking and being buried by the silt to death.
3. Sowing: Under the premise of ensuring the normal stocking density of prawns, the optimal sowing amount of oyster seedlings is about 30,000 per 66,700 square meters. The sowing date should be selected in early April, and the specification of seedling seed player is more than 2cm in shell length. Sowing seedlings should be stressed evenly, and should avoid the low-lying area and feeding area around the ditch. The nursery area accounts for 1/4 ~ 1/3 of the pool bottom area.
3. Riprap culture: The stone once used as oyster seedling picker is now oyster culture equipment. Oysters with short growth periods can be cultivated in nurseries. Oysters that grow along the river should be moved to breeding grounds for breeding. There are three kinds of cultivation methods: starry sky, plum blossom and determinant.
1. Mantian: Oysters and stones are mixed with confidants and placed irregularly.
2. Plum blossom style: generally 5-6 oyster stones are a group.
3. Determinants: The row spacing of 0.5 ~ 1m and 0.6 ~ 1.5m can be used for deep-water culture, and there is no need for any management from throwing stones, taking seedlings and harvesting.
The above is the common cultivation of oysters. What are the environmental requirements for oyster culture? I hope it helps you.