Fresh shrimp cultivation techniques
In the autumn, it takes only two or three months to raise the green shrimp, and it can produce more than 100 kilograms of fresh shrimp per mu. The size of the shrimp is large and the breeding efficiency is high. The specific operation is as follows: 1. Pond conditions. The water source is required to be free of pollution, and the injection and drainage are convenient. Pond area 1.5-4.5 acres, water depth 1.2-1.5 meters. The silt in the bottom of the pool should not be too thick, about 5 cm. Sandy loam is better for the bottom. The pool stalk is more than 2 meters wide and the slope ratio is 1:3-4. The pool slope should have a large shallow beach foot and the shallow water area should be about 0.4 meters. An impeller-type aerator is set in the pool, with 0.5-1 kilowatts per acre. After the shrimp pool is clear pond, small squares or ribbons of aquatic plants are planted on the surface of the water, occupying an area of ​​25%-30% of the water surface. 2, timely stocking. In the autumn, the young shrimps should be raised from the beginning of September and the shrimps should be listed on the New Year's Day and the Spring Festival. Before the juveniles were stocked, the ponds were filled with 80 cm of water, and the influent water was filtered in three stages using a 40-mesh sieve. At the same time, 300-400 kilograms of decomposed livestock and poultry manure are applied per mu, and the whole pond is spattered with fertilizer liquid after de-slagging. Before juvenile prawns try to “test water†to avoid excessive temperature difference. Generally, 15 kg of juvenile shrimp are stocked with 2-3 cm per acre. An 8 square meter screen is set horizontally in the pond during stocking, and the water depth is 8-12 cm. After some time, the shrimps that are still on the mesh are removed. 3, feed feeding. After the juveniles were in the pool, they were fed daily. Feed is generally replaced by Roche shrimp. Production is usually based on feeding bean cakes, supplemented with wheat bran, rice bran, and animal feed, such as minced wild fish and snails. When the water temperature is 20 degrees, daily feeding is about 10% of the whole pond shrimp weight; when the water temperature is 15 degrees, it is about 7%. As the temperature decreases, the amount of feed decreases accordingly. Animal feeds are fed once every other day, which accounts for about 20% of the total. Feeding in the morning should be regularly scheduled at a shallow depth of about 50 centimeters. Powdered feeds should be soaked in advance, squeezed into lumps and fed. To set up multi-layer artificial shrimp nests. 4, daily management. Within 7 days after the prawns enter the pool, the water depth is maintained at 1 meter; 7 days later, water is gradually added and the water level is increased to 1.5 meters within 1 week. The pH value of the shrimp pond is kept between 7-7.2, and the water is changed once every 8-10 days. The aerator is usually open at midnight from 1 midnight to sunrise and open all day in rainy days. Once the floating head appears, it is necessary to open the aerator in time and add new water. 5. Disease prevention and control. Mainly to prevent disinfection, generally splash lime water 2 times per month, each time 15 kg per mu. Snacks usually refer to the food eaten outside the time point of three meals a day. Under normal circumstances, in people's life, except that three meals a day are called dinner food, the rest are called snacks. Canned fruit is a healthy snack. AGOLYN wholesale all kinds of canned fruit, such as canned yellow peach, canned orange, etc Snacks,Canned Lychee,Canned Peaches,Canned Fruit Xi'an Gawen Biotechnology Co., Ltd , https://www.agolyn-bio.com