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How to raise meat donkeys for high yield? A detailed explanation of breeding techniques
Breeds and fattening. Donkeys of different breeds differ considerably in their nutrient requirements during the fattening period. Generally speaking, meat-type donkeys require less nutrients to achieve the same daily weight gain than non-meat-type breeds. Age and fattening. Donkeys at different growth stages have
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Detailed explanation of large-mouth catfish farming technology, master the methods of catfish farming
I. Biological characteristics The large-mouth catfish is one of the fastest-growing and largest species among fish of the order Siluriformes, family Siluridae. Common individuals weigh 5-10KG, and the largest individuals reach 60KG. Its head is wide and somewhat flat, its eyes are small and its mouth is large, hence the name large-mouth catfish. Its upper and lower jaws are densely covered with fine teeth that curve inward like barbs, making it extremely difficult for prey to escape once bitten. Adult fish have two pairs of barbels, of which one pair of maxillary barbels is very long, while the other pair of mandibular barbels is very short and often hard to notice, but in the juvenile stage there are 3 pairs of barbels. Its dorsal fin is short and small, clustered, with no hard spines; the pectoral fin has a thick, sturdy hard spine with no obvious serrations on the outer side, but it feels rough to the touch; the anal fin is extremely long and connected to the caudal fin; the caudal fin is small, concave in the middle, and the upper lobe is longer than the lower lobe. The body color of the large-mouth catfish varies with the environment and the type of food. The back and sides of the body are mostly yellowish brown, bluish gray, or yellow-green, while the belly is grayish white, mixed with black spots, but without cloud-like patterns, and all fins are grayish black.</p><p></p><p>I. Pond main culture</p><p>1. Fingerling stocking To increase the survival rate and improve farming benefits, the large-mouth catfish fingerlings stocked must be above 8cm and uniform in size. For stocking density, stock 1000-1500 fish per mu at the 8cm-10cm size; stock 800-1200 fish per mu at the 10cm-12cm size, and polyculture 100-120 large-size silver carp and bighead carp fingerlings of 150g-250g in the pond to regulate water quality. 2. Feed feeding The large-mouth catfish is a carnivorous fish, mainly using live fish or chilled fresh fish and animal viscera as bait, but it can also be trained artificially to eat artificial compound feed. (1) Carnivorous bait: when stocking large-mouth catfish fingerlings, correspondingly stock slightly smaller carp, crucian carp and other fingerlings. Each day, still mainly use chilled fresh fish chunks, and pig lungs, cattle lungs and other animal viscera can also be fed. When these animal feeds cannot be guaranteed, artificial taming for feeding can be used to make them eat artificial compound feed, which can achieve relatively good results. (2) Artificial compound feed: the protein content of the compound feed is 41%-50%. When feeding, set up (2-4) feeding tables in each pond to make it easier to observe feeding conditions. 3. Daily management Patrol the pond 3 times a day in the morning, noon and evening to observe fish feeding and growth conditions, change the water once every 5d-7d, strictly prevent the large-mouth catfish from floating to the surface, and take corresponding preventive measures. II. Pond polyculture In adult fish ponds, broodstock ponds, or large lakes and reservoirs with abundant wild trash fish, depending on the abundance of forage fish, polyculture 15-30 large-size large-mouth catfish fingerlings of 8cm-10cm per mu. Without increasing feed input, without requiring special management, and without affecting the main cultured fish, 30kg-50kg of marketable large-mouth catfish (individual weight 1.5kg-3.5kg) can be produced in the same year. The technology for polyculturing large-mouth catfish in adult fish ponds is simple, with low input and high returns, but in production attention should be paid to: large-mouth catfish cannot be polycultured in the same pond with carnivorous fish such as mandarin fish and snakehead, and smaller-size large-mouth catfish cannot be stocked for polyculture; the size is best above 8cm.</p><p>III. Cage culture</p><p>1. Cages According to fingerling size, equip three types of cages with different mesh sizes: first-level fingerling cages, second-level fingerling cages, and adult fish cages. First-level fingerling cage: mesh 0.6cm-0.8cm, size 4mx4mx2m or 5mx5mx2m, single-layer warp-knitted knotless polyethylene open-top cage; second-level fingerling cage: polyethylene knotted open-top cage with mesh 1cm—1.5cm, size 4mx4mx3m or 5mx5mx3m; adult fish cage: mesh 2.5cm-4cm, size 4mx4mx3m or 5mx5mx3m double-layer polyethylene knotted closed cage. 2. Fingerling stocking Large-mouth catfish used for first-level stocking are most suitably stocked in early to mid-May each year. For stocking density, stock 500-600 large-mouth catfish fingerlings per m2 at the 4cm-5cm size. After 15d-20d of rearing, divide them by size into separate cages for rearing. At the 8cm-10cm size, stock 350-450 fish per m2. When they reach above 15cm, promptly transfer them to second-level cages and stock 250-300 fish per m2. When the fingerlings reach about 25g, transfer them to adult fish cages and stock 40-60 fish per m20.</p><p>3. Feed feeding In cages, feeding tables are set up to make it easier to observe fish feeding conditions and ensure full use of the feed. Generally, set up 1 feeding table per 1Om2, suspended inside the cage 20cm—30cm above the cage bottom. When the total length of the large-mouth catfish is 5cm-10cm, the daily feeding rate is 8%-10% of fish body weight; at total length 10cm-20cm, it can be adjusted to 4%-6%; when total length is above 20cm, the feeding rate is 1%-3%. Feed three times daily in the morning, afternoon and evening. Among these, slightly increase the feeding amount in the evening. The bait can mainly be wild trash fish, chilled fresh fish, and animal viscera, and artificial compound feed can also be fed through artificial taming. The method is: after the fingerlings enter the cage, first stop feeding for 1d-2d to make them feel slightly hungry, then each day place a small amount of attractant on the feeding table and slowly feed artificial compound feed. As the fish adapt to the artificial compound feed, correspondingly reduce the amount of attractant until the large-mouth catfish completely adapts to eating artificial compound feed. (1) Fingerling-stage feed formula: fish meal 42%, a-starch 15%, soybean meal 10.9%, peanut kernel meal 18%, yeast powder 3.3%, scallop powder 5.2%, fish oil 3.1%, premix 2.5%, crude protein content 35%. (2) Adult-fish-stage feed formula: fish meal 25%, wheat middlings 18%, soybean meal 18%, peanut kernel meal 18%, yeast powder 5%, fish oil 1.1%, corn 10.4%, compound amino acids 2%, premix 2.5%, crude protein content 35%. 4. Rearing management During the fingerling cultivation stage, cage sorting and screening should be done well. Regular cage sorting is a key measure to increase fingerling survival rate. Generally, during the fingerling stage, sieve all fish once every 15d-20d and rear them in separate cages by size. At 8cm-10cm, transfer them to second-level fingerling cages; when they reach about 25g, they can be put into adult fish cages for rearing. In daily rearing, the large-mouth catfish has sharp mouth teeth. When bait is insufficient or when it feeds on bait beside the cage, it easily bites through the netting. Usually, regularly check the cages for damage, regularly clean the feeding tables, ensure unobstructed water flow inside and outside the cages, regularly check the bait condition on the feeding tables, remove spoiled and deteriorated residual bait, and appropriately increase or decrease the feeding amount according to how much bait remains.</p>
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A Detailed Explanation of Feed Formulas for Silver Carp Farming
I think silver carp is fairly common in daily life, and everyone eats it often. As China's aquaculture industry has been developing very well in recent years, especially in the area of farmed fish, fish farming has a relatively low threshold and low investment cost, making it very suitable for rural
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Detailed Explanation of Key Points for Intensive Snakehead Farming Technology
The northern snakehead is commonly known as snakehead, spotted snakehead, ink-head fish, etc. At present, the main species farmed in China are the northern snakehead, the spotted snakehead and their hybrids. The northern snakehead is a valuable economic fish among the Channidae, with large individuals, fast growth, high yield and high economic value; its flesh is delicate and delicious
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Detailed Explanation of Key Technical Points for Semi-Wild Soft-Shelled Turtle Farming
Semi-wild soft-shelled turtle farming is a healthy farming method that imitates the natural growth habits of soft-shelled turtles. The farming cycle (3 to 4 years) is relatively long, so the soft-shelled turtles produced have the excellent quality of wild characteristics and sell very well on the market. The average yield is generally 250 to 300 kg per mu, with an average annual income of about 6,000 yuan per mu, achieving relatively good economic, social and ecological benefits.
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Detailed Explanation of Key Points on Hatching Techniques for Silkie Chicken Breeding Eggs
I. Selection of Hatching Equipment Nowadays, hatching equipment has become increasingly sophisticated, basically achieving automation and microcomputer control. Traditional hatching methods are basically no longer used, and adopting modern hatching equipment not only saves manpower but also achieves a higher hatching rate.
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Detailed Explanation of Artificial Incubation and Brooding Techniques in Meat Pigeon Farming
For raising meat pigeons, purebred King Pigeons and Silver King Pigeons, two kinds of meat-type King Pigeons, are generally selected. The rearing method can adopt indoor three-tier single-cage paired production. The eggs laid by breeding pigeons are placed in batches into a small incubator for hatching. Because pigeon eggs are small, the egg rack for chicken eggs should be modified into an egg rack suitable for holding pigeon eggs
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Detailed Explanation of Key Points of Artificial Incubation Technology for Pheasants
Pheasant breeding eggs should be incubated as soon as they are laid. If the number of eggs is small, domestic hens can be used as surrogate incubators. If there are many breeding eggs, an incubator must be used. The incubation procedure for pheasant breeding eggs is the same as for domestic chickens, except that the incubation period and the control of temperature and humidity differ somewhat. When adopting artificial incubation, the following work must be done well.
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Detailed Explanation of High-Efficiency Feed Formulas for Meat Rabbit Farming
Corn 30%, soybean cake 23% (roasted and ground, same below), wheat bran 12%, rice bran 10%, grass meal 20%, bone meal 2%, salt 0.5%, rabbit 1%, Rabbit Qiu Dan 2%. Feed each rabbit 10 g-20 g per day, plus 50 g-100 g of green feed. Breeding buck feed formula (1) Mating period: corn 11%, soybean cake
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Detailed Explanation of Practical Technical Points for Meat Dog Farming
1. Feed must be diversified. Dogs require many nutrients, and a single type of feed is unbalanced and incomplete. Therefore, multiple feeds must be combined with one another to meet the needs of meat dog growth and development. 2. Prepare feed reasonably. Different feeds should be prepared
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