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Childish collection and stocking techniques
To maintain a good reputation, the primary task is to do a good job in collecting and stocking young children: 1. When the first child in the hatchery room is hatched and falls into the water, the young child has already started to collect the young child's collection. . At this point, do not take out a small amount of larvae immediately. The first reason is that because of the newly hatched juveniles, the amniotic membrane has not yet fallen off, the umbilicus has not been completely closed, the constitution is too weak, and it is easy to be easily injured by catching it immediately; secondly, it takes 1 day for hatching of large numbers of juveniles. The time of day, and the production practice of quail eggs hatching, shows that the dates of hatching of large batches of juveniles appear on the 3rd to the 4th day after the first hatchery hatches. If only 1 hatched, only 1 will be caught. Not only does it cost a lot of money, it is not conducive to feeding. The criteria for juveniles are: 1 Amniotic membrane shedding. 2 umbilicus closed. 3 The number of hatchlings hatched can satisfy at least one stocking of Dianchi. For this purpose, hatching hatchlings are generally caught in the hatchery for one day before being caught. When catching the baby, first cut off the power in the hatchery and stop heating the heaters such as infrared lamps. Open the door and window of the hatchery, use the time of about 12 hours to adjust the temperature and humidity inside the hatchery to be the same as the outside, and then prepare a container with a smooth inner wall, such as a plastic basin, and then clean it and wait. We are full of children. Due to the opening and opening of the windows, under the influence of cooling and ventilation, the hatchlings in the hatchery will be hatched and hatched in large numbers, mixed with the hatchlings hatched on the previous day. Therefore, the hatchery is invisible when collected. To catch, must be selected, the amniotic membrane has fallen off, the umbilicus has been closed into the plastic pots. At the peak of hatching, the young fish swim in the shallow water in the hatchery and the density is very high. The catcher's feet can't be stepped into the childishness. When catching, it is best to close the two palms, gently insert the grasshopper below, and then slowly. Hold the juveniles out of the water and place them in plastic pots with 1/3 of the water. In general, a plastic pot containing about 500 young children can be sent to the hatchery for larvae disinfection. Do not put jujube in a dry plastic basin without water, nor can it be filled too much at one time. In order to avoid causing childbirth injuries and deaths. Second, the juvenile decontamination The juvenile deer caught in the hatchery must be disinfected first. Sterilization is usually carried out in an oval bathtub with a smooth inner wall. Commonly used disinfectants are 8ppm-1Oppm potassium permanganate and the disinfection time is 20 minutes-30 minutes. Before disinfecting, wash the tub first, then prepare the disinfectant liquid as required, and dispose the disinfectant tub into each disinfectant tub. Each pot will contain 10kg-15kg of disinfectant solution; then, the baby will be caught from the hatchery. Count into the disinfection of the tub, record the time of the start of disinfection, carcass disinfection density in the basin can be free to swim freely, not superimposed on each other is appropriate, generally put about 500 per pot of larvae. Disinfection time is controlled flexibly by weather conditions. If the weather is fine, the temperature is above 25°C and the disinfection time is 15 minutes. If the weather is cloudy and the temperature is low, the disinfection time can be extended to 20 minutes. As potassium permanganate will reduce the potency of the light, disinfection should avoid sunlight. Third, the juvenile open mouth feeding Infant larvae can be opened after eating, open bait should be fed in the same brand of juvenile dip material. When opening food, we must first make a feed slurry, which is usually made by adding 1 part of juvenile feed and 50 parts of water, and first mixing a small amount of water in the juvenile feed to reconcile evenly, and then rub the feed by hand while mixing the water. The feed is fully dissolved in water, and in particular the sticky and agglomerated feed is repeatedly kneaded to make a uniform feed slurry. The prepared slurry was filled into each bath, and each tub was filled with 8-8cm-1Ocm of feed slurry, and 500 juveniles were placed in the tubs filled with feed slurry for food intake. Each time of juvenile feeding is 0.5 hours - 1.0 hours. When juveniles are put into the feed slurry, they will start feeding when they smell the feed. The benefits of feeding with this method are: First, increase the nutrition of juveniles and enhance the constitution of juveniles; Second, the function of acclimating juveniles to identify feed odors is conducive to ingesting nutritious full-price compound feed as soon as possible and promoting it. Grow. Fourth, juvenile stocking 1, pre-stocking preparation 1 Qingchi disinfection whether it is a new pool, the old pool, in the jujube stocking before entering the pool 7 days -10 days should be carried out dry lime disinfection, the amount of 1OOkg / mu -120kg/mu, if the old pool with more silt in the bottom of the pool, the amount of quicklime can be increased to 150kg/mu -200kg/mu. 2 The practice of fertilizer and water production shows that if the pool is too thin during stocking, the juveniles that are stocked in pools tend to grow slowly and are prone to diseases such as white spot disease. The reason is mainly due to the lack of biological basic food such as rotifers in pond water. Due to the bite between the baby and the baby, for this reason, after the disinfection of the Dianchi Lake, the fish should be fertilized with fertilizer and water within 5 days to 7 days before being stocked in the pool. The commonly used method is to first apply 400kg/mu -500kg/mu fermented and decomposed organic compost at the bottom of Dianchi Lake, and then fill the water at a depth of 40cm-50cm to cultivate rotifers. When the larvae are stocked, the transparency of the pool water reaches about 30cm. It is tender green or red brown. 3 Planting aquatic weeds The purpose of planting aquatic weeds is to increase carcass inhabiting space and hidden places, reduce the chances of individual biting each other, and reduce caries occurrence. Planted plants are mainly water lettuce, water hyacinth, and water peanuts. The grass area is generally about 1/4 to 1/3 of the surface of Dianchi Lake. It can be planted in the four corners of Dianchi Lake or planted in the central area of ​​Dianchi Lake. You can also put a good straw rope around the pond before cutting and planting. 4 Set up the feed table The feed table can be set up with cement and corrugated board. The cement corrugated board is 150cm long and 60cm wide. It is placed every 4m-5m and placed horizontally on the slope waterline of the Dianchi Bank to make it 1/3 submerged. Under water, 2/3 is exposed to water. When feeding, the pellet feed is placed in corrugated troughs close to the waterline for feeding by carcasses. 2. After the juvenile stocking, the juvenile clams can be stocked into the pool after the tame food, and the stocking density is set to 2 or 3 eggs per fish. After 2 years of breeding, more than 90% of the adult clams can reach the merchandise.鳖 specifications, individual body weight above 400g / only, per mu up to 550kg-750kg. The precautions for juvenile stocking are as follows: 1 When paying attention to the temperature difference, the water temperature in the hatching room should be basically the same with the water temperature in Dianchi Lake. The maximum temperature difference should not exceed 3°C. The commonly used adjustment method is to catch the hatching room. After being disinfected and tamed, the quail is not eager to put it into the pool. Instead, it is first raised in a large container such as a bathtub and slowly adds water from the pool. After 2h-3h, the temperature of the raised water is adjusted to a temperature difference from the temperature of the pool. 3 °C, then put into the pool. 2 Pay attention to the time for juvenile stocking in the pool. It is best to choose to have the high temperature and water temperature at noon during the day. At this time, the juvenile clams have strong activity, less stress response and strong adaptability. 3 Note that the weather should be selected for juvenile stocking in a sunny day, sunny weather, the temperature and water temperature relatively high in the day, juvenile stocking into the pool will soon feed, supplement nutrition, and promote their own body growth. If you choose to stocking in rainy weather, most of the juveniles will avoid the silt under the feed plate or embankment, and they will not move or consume. This will both consume physical strength and weaken the body, affecting growth and survival. To this end, the method that can be adopted is to appropriately reduce the temperature of hatching sand, and properly extend the incubation time so as to avoid rainy days and cold air. 4 Note Method When juvenile stocking is put into the pool, it is best to place the juvenile clams on each feed platen so that they can climb from the feed plate into the Dianchi water. At the end of the stocking period, the domesticated feed slurry can be spilled on each feed platen to enhance the ability of the juveniles to recognize the odor of the artificial compound feed, so that they can take their food as soon as possible.