Black dolphin culture technology

Black dolphin is a herbivore, a variety of weeds, vegetables, leaves, melon peel, plant stems and leaves, straw and other straw are its good feed. Feed once a day in the morning and evening, the daily food intake is about 150 grams per animal, supplemented with a small amount of grain, wheat, corn and other concentrate, is a typical grain-saving small livestock. There are many grassy mountains and slopes in the vast rural areas, and the feed resources are very rich. Black dolphins can make effective use of local grass feed, which enables each farmer to obtain huge economic benefits and high-grade game natural black nutritional supplements in a very short time.

Preparation of black dolphin breeding ground

First of all, there are a variety of ways of raising black dolphins in breeding facilities, which are generally adopted in accordance with local conditions: cage breeding, flat pond type captive breeding, three-dimensional scale factory breeding.

1. Caged. Where a small amount of feeding can be used in this way. The utility model has the advantages of being able to control reproduction, feeding, and keeping clean and hygienic. The cage can be made of wood strips, bamboo slices and iron wire, and the specification is 60 cm × 50 cm × 40 cm.

2. Flat pond type captive breeding. It is suitable to be used in the case of bungalow and width. The room is divided into a 0.5-1 square meter pool with bricks and planks, and it is best to pad some sawdust or dry strokes in the pool, which is conducive to keeping warm and absorbing moisture. At present, most of them are raised in this method.

3. Three-dimensional factory feeding. Its scale is large, relatively centralized, easy to manage and operate, and a large number of animals are raised. Use brick or wood, iron bar to make 3-5 layers, the bottom is slightly inclined, so that feces flow out, easy to manage. There are small doors in the pool and cage. Generally, the stocking quantity is determined according to the size of the cage, with a density of 8-10 and 10-20 per square meter. Generally speaking, the length and width of 100 cm × 50 cm can be put 1 male and 4 female, those of 80 cm × 50 cm can be put 1 male and 3 female, those of 60 cm × 50 cm can be put 1 male and 2 female, and those of 45 cm × 35 cm can be put 1 male and 1 female. And pond culture, box culture should be appropriate sparse. Before releasing the black dolphin, spray and disinfect the house with a concentration of 0.02% potassium permanganate solution.

Feeding technology of black dolphin

The Chinese black dolphin has a wide range of feeding habits, and it is a herbivore that mainly eats green feed. Weeds, leaves, straw and vegetables are all its food sources. It is usually fed once every morning and evening, each with about 150 grams per meal. In order to promote the growth of black dolphins, it is also necessary to feed some full-price mixed feed, whose composition is similar to that of rabbit feed. Such as self-made mixed feed (concentrate), the proportion of raw materials is: corn meal 40%, grain flour 10%, drum skin 30%, peanut shell meal 15%, fish meal 2%, bone meal 2%, salt 1%. Feed is made into pellets or mixed with water to make wet material for feeding. The eating habits of black dolphins are very miscellaneous, and adequate nutrition is needed for normal growth, development and reproduction. Because the black dolphin is a herbivore and has a high digestibility of crude fiber, peeling will occur if plants such as green material or hay are not supplied for a long time, so the feed supply should be matched with fine and green materials. Green material: fresh tender grass, such as oak grass, corn leaves, sugarcane leaves, leaves, green vegetables, peels, carrots, sweet potatoes and so on.

Sanitary management of breeding ground

Black dolphins love to be clean, whether in captivity or cage, we should do a good job in the environmental hygiene of the breeding room, wash the trough regularly to prevent food mildew, ensure the freshness of feed and drinking water, and put an end to the pollution of feed and drinking water caused by wild rats and cockroaches.

Breeding technology of black dolphin

The black dolphin matures early. Generally, female dolphins are 35-45 days old, and male dolphins have sexual characteristics at 70 days old. But the female dolphin had better breed after 70 days of age. Gender identification: a simple method is to press the perineum with your hand; to see if there is a penis and the shape of the vulva, you can confirm the male and female. During capture and inspection, hold the black dolphin's back with your right hand, hold its left shoulder with your thumb, hold your right shoulder and chest with the other four fingers, gently pick it up, and then hold its body with your left hand. The sexual cycle of female dolphins is 16 days, and the duration of estrus is 18 hours, with an average of 9 hours. The gestation period of female dolphins is 56 Murray 68 days, and the number of pregnant offspring is 3 Murray 5, as many as 6 Murray 9.

1. Seed selection. Breeding dolphins should choose plump posture, strong bones, straight limbs, bright eyes, good nutritional status, bright coat color, soft and elastic skin, symmetrical testes of male dolphins, and normal vulva development of female dolphins.

2. Mating. The estrus duration of the black dolphin is 1-18 hours, with an average of 9 hours. most of the estrus time is between 5 pm and 5 am the next morning. after the female dolphin mating, there is a gelatin-like mixture at the vaginal mouth. We can judge whether the black dolphin is successful or not. Under normal circumstances, black dolphins reserved for original breeding are carried out by mating method of one male and one female, that is, only one pair of breeding dolphins are placed in each culture pond, and the female dolphins should be allowed to live together and breed after weaning; the male dolphins can be put into blood mating within half a day after the female dolphins give birth, and the breeding rate and reproduction rate are high. When raising in large groups, 3 to 4 female dolphins are often put into one male black dolphin for mating. Do not put two male dolphins in order to prevent fighting and affect breeding.

3. Giving birth. The pregnancy period of female dolphins is about 68 days, and the number of pups is generally 3 to 7. The young dolphins are weaned after 15 days and fed separately after weaning. Usually 60-80 days can meet the commodity requirements. During pregnancy, in addition to improving the quantity and quality of feed, the site should be kept quiet and clean, and idle personnel should not go in and out at will. Keep the diet fresh and feed less and eat more. In the third trimester, hay should be placed in the cage so that the mother dolphin nests ready to give birth.

The lactation period of young black dolphins is 15 days in summer and 20 days in winter. The feed nutrition of female dolphins should be increased during lactation. The black dolphin has high reproduction rate and strong immunity. The breeding life of the dolphin is 3 years. There is no need for immunization and drug control in the process of breeding.

Feeding and management methods of black dolphin

Feeding and management is the key to black dolphin breeding, with emphasis on preventing feed from mildew and deterioration. It is best to feed with formula feed. When pellet feed is fed directly, it should be fed with clean water or mixed feed, eat less and eat more, at a cost of about 40 grams per diet, twice a day to keep the trough clean and hygienic. After feeding the concentrate, fresh green material is added at the same time. The green material had better be cut and fed on the same day. The amount of green material collected by each adult is about 250 grams per day to prevent feeding the green material contaminated by pesticides.

The feeding room should be kept quiet, the feces should be cleaned every day, and the utensils should be scrubbed clean frequently. It is best to keep the room temperature at 18 ℃-25 ℃, and the relative temperature is 45% 55%. Keep warm in winter. Prevent rodents and snakes from entering the breeding room to create a comfortable living environment for black dolphins. Breeders should be conscientious and responsible, pay attention to observation, and deal with problems in time. Management of the four Seasons Management in Spring:

1. If the temperature is suitable in spring, we should feed more green fodder and pay close attention to reproduction so as to maintain a certain density and indoor environmental hygiene.

2. Summer management: the summer temperature is high, so it is necessary to do a good job of heat prevention and cooling, strengthen indoor ventilation, keep the room clean and dry, remove faeces in time, reduce density, strictly detoxify, strengthen nutrition, and maintain the physical stability of black dolphins.

3. Autumn management: in autumn, the sky is crisp and the temperature is pleasant, keep the indoor floor, cages and utensils clean, draw up a breeding plan, prepare more green feed, and prevent feeding spoiled feed.

4. Winter management: the weather is cold in winter. To keep warm and prevent the wind from entering, we can appropriately increase the feeding density of black dolphins. Due to the insufficient supply of green feed in winter, we can appropriately increase the feed concentrate such as cereals and bran.

Black dolphins eat grass, gentle temperament, fast reproduction, less diseases, simple feeding methods, less investment, quick results, very suitable for laid-off workers, rural surplus labor force feeding, young and old, so the promotion of black dolphin farming has a good social significance. Good social and economic benefits can be obtained.