First, pond selection: Choose a pond area of 2 to 5 acres with a flat bottom, minimal silt, and water depth between 1 to 1.2 meters. The water source should be clean and free from pollution to ensure optimal conditions for shrimp breeding.
Second, pre-filling preparation: About 10 days before stocking the broodstock, apply lime at a rate of 75-100 kg per acre to disinfect the pond. After 2-3 days, fill the water to a depth of 60-80 cm. It is important to use an 80-mesh filter when filling the pond to prevent unwanted debris or predators from entering.
Third, broodstock selection: Select healthy adult shrimp that are at least 5 cm in size, with strong vitality, no signs of disease, and a large number of eggs held in their swimmerets. These shrimp should be mature and ready for spawning.
Fourth, shrimp hatching methods: There are two common approaches for hatching shrimp eggs. One method involves placing the egg-carrying shrimp directly into the main pond for natural incubation. Another method is to place them in small mesh cages within a nursery pond for controlled hatching. Each cage should be approximately 2 meters long, 1 meter wide, and 1 meter deep. Ensure the netting is fine enough to prevent the broodstock from escaping. Add some aquatic plants or poplar roots inside the cages to provide shelter for the developing eggs. Typically, each cage holds about 2-3 kg of eggs, and for one acre, around 10 kg of eggs are needed. It's crucial to maintain uniform egg color in the same pond to ensure consistent hatching and even growth of larvae.
During the hatching period, feed the broodstock twice daily with food such as pellets, crushed snail meat, soybean meal, or other suitable feeds. The daily feeding amount should be 3-5% of the broodstock’s body weight, adjusting based on their activity and condition.
When the eggs are fully developed, they will turn black and show distinct black spots. At this stage, the female shrimp may become aggressive and start eating the newly hatched shrimp, so close monitoring is essential.
Fifth, feeding and management of shrimp seedlings: Three days after hatching, when the larvae have absorbed their yolk sac, begin feeding them with soy milk at a rate of 0.5-1 kg per acre, distributed in the morning and afternoon. As the shrimp grow, gradually increase the amount of food and introduce soybean meal, wheat flour, fish meal, or fish paste into their diet.
The entire hatching process usually takes 25-30 days, during which the larvae go through about nine stages of metamorphosis. On average, one kilogram of egg-carrying shrimp can produce around 100,000 shrimp seedlings.
Throughout the rearing period, it's important to manage water quality by maintaining a water clarity of about 30 cm. This helps keep the water "fat, live, and cool," promoting healthy growth. Once a week, add 15 cm of fresh water to the pond. Additionally, remove any frog eggs daily, as they can reduce shrimp yield and lead to unnecessary feed waste.
When harvesting shrimp seedlings, avoid windy weather to prevent them from getting stuck in the nets. Also, when stocking shrimp, make sure the water temperature difference between the transport container and the pond does not exceed 3°C, as sudden temperature changes can cause high mortality among the shrimp.
Herbal vegetable oils:
Source: Mainly extracted from herbaceous plant oil.
Common types: soybean oil, corn oil, peanut oil, sunflower oil, etc.
Features: Relatively high output, the price is relatively close to the people. Soybean oil is rich in unsaturated fatty acids such as linoleic acid, which has a certain effect on lowering cholesterol. Corn oil is rich in vitamin E and unsaturated fatty acids, which are good for cardiovascular health; Peanut oil is rich in flavor and monounsaturated fatty acids. Sunflower oil contains high amounts of linoleic acid and vitamin E, which help lower blood cholesterol.
Woody vegetable oil:
Source: Derived from the fruit, seed, or kernel of woody Herbal Oil.
Common types: Pure Essential Oil such as aloe vera oil, olive oil, tea seed oil, sesame seed oil, walnut oil, palm oil, seabuckthorn seed oil, etc.
Features: Generally has a high nutritional value and unique flavor. Olive oil is known for its rich monounsaturated fatty acids and antioxidants, which are good for heart health and the digestive system; Tea seed oil is rich in unsaturated fatty acids and antioxidant components, has the characteristics of high-temperature resistance, not easy oxidation, suitable for cooking; Walnut oil is rich in unsaturated fatty acids, vitamins, and minerals, which are good for brain development and cardiovascular health. Palm oil is widely used in food processing and industrial production, and has high stability and antioxidant properties.
Plant Oil,Clove oil,Coconut Oil,Seabuckthorn Seed Oil
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