-
Methods to Improve the Survival Rate of Grass Carp Fingerlings in Grass Carp Farming
Whether grass carp are raised in monoculture or in polyculture with grass carp as the main species, the water quality must be kept fresh. Feed mainly with green feed and supplement with concentrated feed. Concentrated feed includes bran, beans, and compound feed, etc. During the initial stage of stocking (within 15 days), summer fry should be fed some fresh and tender aquatic plants, such as duckweed and watermeal.
-
How to polyculture mandarin fish for a high survival rate? Practical methods shared
Mandarin fish is a typical carnivorous fish that only eats live fish and live shrimp. Raising mandarin fish alone requires supporting the culture of forage fish, and the technical requirements are high. If mandarin fish are polycultured in adult fish ponds, the water body can be fully utilized and wild trash fish in the adult fish ponds can be cleared out. In recent years, some farmers have reported
-
How can the survival rate of artificially bred black carp be improved?
The maturation period of black carp is later than that of silver carp, bighead carp and grass carp broodstock, and the gonads generally struggle to reach the standard for induced spawning at the end of stage IV. Therefore, a method of promoting maturation should be adopted. 15 to 20 days before induced spawning, seine the pond to check the maturity of the broodstock, and promptly give the less mature female and male broodstock
-
How to Improve the Survival Rate of Scallop Seedlings in Nursery Rearing
Suitable ponds for nursery rearing The pond should preferably have an east-west oriented rectangular structure, with a sandy or hard bottom, a water storage depth of more than 1.5 m, a salinity below 35, and an unpolluted external seawater source; before filling the pond with water, the bottom sludge layer must be thoroughly removed and the pond fully sun-dried; it is prohibited to
-
Detailed Explanation of Key Points in Gecko Rearing and Management Experience
Large and small geckos should be reared separately. Generally, when the body length reaches about 90 mm, they can be placed into the large gecko room for rearing. If geckos that are too small are reared in the same room as large geckos, they are easily swallowed. At a temperature of 18-20°C, geckos begin to move and feed. Geckos come out at night to move and prey on larvae.
-
How to Achieve Integrated Control in Locust Farming
Locusts, also known as grasshoppers, rice stem borers, and paddy grasshoppers, belong to the phylum Arthropoda, class Insecta. China has more than 17 known species of locusts. In our area, the Chinese rice locust (Oxya chinensis) is the dominant species, mainly damaging crops such as rice, corn, sugarcane, and wild rice stem. The Chinese rice locust occurs in our area
-
How to effectively increase the litter rate in hedgehog farming
In regions where the false hibernation period is relatively short, hedgehogs can produce 2 litters every year; in places where the false hibernation period is long, they produce 1 litter per year. To ensure that domestic hedgehogs produce 2 litters per year, farms (households) that build breeding pens indoors should start heating with a stove indoors in February
-
What methods are there to increase duck egg production when raising ducks in winter?
Winter weather is cold and temperatures are low, so how to increase the egg production rate is a concern for many farmers. Pay attention to cold protection and warmth. Cold air activity is frequent in winter, making it difficult for laying ducks to adapt and causing a drop in egg production. Therefore, cold protection and warmth work for laying ducks must be done well, such as
-
How to deal with low reproductive rates in meat sheep? Practical solutions shared
Feeding fishmeal to meat sheep can improve the reproductive rate. Feed-grade fishmeal contains 90% dry matter, of which about 15% is ash, about 65% is crude protein (about 60% is digestible protein that can be directly used by animals), and about 7% is minerals such as crocodile [sic] and phosphorus. It is a good animal-based feed. In order to improve the breeding value of stud rams, further improve the efficiency of sheep artificial insemination, and explore ways to solve the source of protein feed, during the winter mating of 1972, at three mating points of the Heka Stud Sheep Farm, we trial-fed fishmeal to Xinjiang, Tsigai, Polwarth and crossbred rams bred on the farm, with good results. The feeding method is to sprinkle the fishmeal into the feed and mix it evenly. Fishmeal contains long-chain polyunsaturated fatty acids and is a good source of eicosapentaenoic acid and docosahexaenoic acid. Long-chain fatty acids have greater resistance to rumen bacteria. In addition to being rich in protein and more than 50% rumen-undegradable protein, which can increase milk yield and the protein percentage of cow's milk and sheep's milk, another important aspect of fishmeal is that it can inhibit the prostaglandin levels of cows and ewes. According to reports, 30 high-yielding ewes were fed diets with 0, 2.6, 5.2 and 7.8% fishmeal for a total of 42 days, and the results showed that inhibition of prostaglandins in ewes can improve embryo survival rate.</p><p></p><p>Supplementing more digestible undegradable protein in late pregnancy and early lactation can significantly increase peak milk yield and milk yield in the first 8 weeks of lactation. In most studies, milk composition increased somewhat, especially milk protein yield in early lactation. In addition, feeding more digestible undegradable protein may also increase appetite, and fishmeal is a good source of digestible undegradable protein.</p><p>Strengthen selection and mating</p><p>Selection of stud rams: select and breed rams from the offspring of ewes with high reproductive rates. They are required to have standard body shape and appearance, be robust, have well-developed testicles, and have obvious male characteristics, and through measures such as semen quality testing and progeny testing, discover and eliminate rams that do not meet the requirements.</p><p>Selection of ewes: select excellent individuals from the offspring of prolific ewes, and pay attention to their lactation and nursing performance. Prolific ewes can also be retained based on pedigree.</p><p>Use of prolific genes</p><p>Introducing prolific breeds and crossbreeding them with local breeds is the fastest, most effective and simplest method to improve the reproductive rate of meat sheep.</p><p>Control of breeding technology</p><p>Estrus control: 1. Early weaning of lambs is conducive to implementing the technology of two lambings per year. 2. Hormone treatment. First carry out early weaning of lambs, then treat ewes with progesterone for about 10 days, and after withdrawal inject them with gonadotropin (RMSG), which can induce estrus and ovulation. 3. Use the prostaglandin method. Several days after the end of estrus in ewes, infuse prostaglandin into the uterus or inject it intramuscularly, and the ewes will come into estrus 2 to 3 days after treatment.</p><p>Inducing twin and multiple births: 1. Supplementary feeding to stimulate estrus. Carry out supplementary feeding one month before mating to strengthen body condition and promote estrus. 2. Use twin-lamb stimulant or twinning agent. For the water-based product, inject 1 ml per sheep subcutaneously in the neck 5 weeks and 2 weeks before mating; for the oil-based product, inject 2 ml per sheep intramuscularly in the rump 2 weeks before mating.</p><p>Artificial insemination: adopt advanced insemination techniques to improve the conception rate.</p>
-
Effective Measures to Increase Hatch Rates in Scallop Farming
Scallop is the collective name for bivalve mollusks of the genus Pecten, with over 400 species. More than 60 species in this family are among the important marine fishery resources around the world. The shell, meat and nacre have extremely high utility value. Many scallops are eaten as a delicacy. Scallops with bright colors and radial patterns are favored by collectors, and the patterns have been adopted as designs for artworks.
条件筛选