The first crop was released from late March to early April, using the overwintering seedlings of the fine variety Tangkou, and 4000 larvae per acre. Before laying the seedlings, arrange the water grass or bamboo leaf vegetables in the pond, which accounts for about 50% of the total area of ​​the pond. In the beginning of spring, use fresh crushed small junk fish and shrimp to feed with granular feed, feed 1.5 kg of dry material (3 kg of fresh fish) per acre, and gradually increase the amount of feed fed, and increase 0.5 per acre every 5 days. Kilograms, to release the seedlings for 1 month, feed 5 kg per acre per day, check the nets 45 days after the seedlings are released, and when the crayfish reach 34 to 36 tails/kg, they can be returned.
The second crop was released from late May to early June. After clearing the pond with clear ponds, the late spring seedlings were relatively large, usually 120-160 tails/kg, about 22.5 kg per mu and 4000 crayfish seedlings. After the seedlings are placed, boiled wheat grains (adding 1% salt water until the wheat grains blossom) can be fed and fed 5 to 7.5 kilograms per day, which is stopped on rainy days. At the same time, bamboo leafy vegetables are grown at the beginning of June, accounting for about 50% of the total area of ​​the water body. The second culture of crawfish should pay attention to anti-fighting and ground-changing water supply, and it should be listed and returned before the crabs are listed on the market in early September. During the middle and late breeding of the second prawn (from the 50th day after the seedlings were released), the larvae were caught and caught on the big day and screened and caught on the market.
The third crop will be planted in the middle and late September and early October, and the young crops will be launched in autumn. The seedling volume per mu will increase appropriately. About 5,000 fishes will be placed per acre of water. Small and medium-sized shrimps of 200 to 300 fishes per kilogram will be selected. Feed the processed fresh fish crumbs and shrimp feed to promote broodstock wintering and fattening. The amount of feed depends on the weather and the water temperature, the weather is good, the water temperature is above 20°C, and 2.5-4 kg per mu (the amount of fresh material is increased by 1 times). When the water temperature is lower than 20°C, the feeding amount is reduced by 50%. When the water temperature is lower than 15°C, the feeding amount is further reduced by 50%. When the water temperature is lower than 10°C, feed feeding can be stopped. When the water temperature is below 10°C, the pond water injection should be increased to reach the highest water level of the pond and the water should be kept over winter. In the second year, when the water temperature of the pond gradually warms up (early March), it is timely arrested.
The second crop was released from late May to early June. After clearing the pond with clear ponds, the late spring seedlings were relatively large, usually 120-160 tails/kg, about 22.5 kg per mu and 4000 crayfish seedlings. After the seedlings are placed, boiled wheat grains (adding 1% salt water until the wheat grains blossom) can be fed and fed 5 to 7.5 kilograms per day, which is stopped on rainy days. At the same time, bamboo leafy vegetables are grown at the beginning of June, accounting for about 50% of the total area of ​​the water body. The second culture of crawfish should pay attention to anti-fighting and ground-changing water supply, and it should be listed and returned before the crabs are listed on the market in early September. During the middle and late breeding of the second prawn (from the 50th day after the seedlings were released), the larvae were caught and caught on the big day and screened and caught on the market.
The third crop will be planted in the middle and late September and early October, and the young crops will be launched in autumn. The seedling volume per mu will increase appropriately. About 5,000 fishes will be placed per acre of water. Small and medium-sized shrimps of 200 to 300 fishes per kilogram will be selected. Feed the processed fresh fish crumbs and shrimp feed to promote broodstock wintering and fattening. The amount of feed depends on the weather and the water temperature, the weather is good, the water temperature is above 20°C, and 2.5-4 kg per mu (the amount of fresh material is increased by 1 times). When the water temperature is lower than 20°C, the feeding amount is reduced by 50%. When the water temperature is lower than 15°C, the feeding amount is further reduced by 50%. When the water temperature is lower than 10°C, feed feeding can be stopped. When the water temperature is below 10°C, the pond water injection should be increased to reach the highest water level of the pond and the water should be kept over winter. In the second year, when the water temperature of the pond gradually warms up (early March), it is timely arrested.
Pet Medicines, Pet Supplements,Pet Multivitamin Tablet,Multivitamin Tablet for Pets
Hebei Kexing Pharmaceutical Co., Ltd. , https://www.kexingpharmas.com