Aquaculture Lists
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Research Progress of Disease Resistance breeding in Pigs
The goal of high yield usually leads to a decrease in pig resistance. At the same time, pig farm diseases, especially viral infectious diseases, are a serious threat to the health of pigs. Although vaccination played an important role in prevention and treatment, the epidemic of infectious diseases could not be completely controlled and eliminated. In the long run, using genetic methods to improve the resistance of pigs to pathogens, carrying out disease-resistant breeding has the effect of curing the root causes. In the 1930s, some scholars reported that there were differences in sensitivity to Marek's disease among different chicken breeds.
2019-01-16 -
Limousin cattle
Limu Zan cattle is produced in French persuasion, which was introduced in our country in 1974 and distributed in the north of China. Limousin cattle is produced in France. It was introduced into China in 1974 and distributed in the north of China. Limuzan is a large beef breed of cattle. The hair color varies from golden to dark red, and the hair color of the circles of the eyes, nose, lower limbs and perineum is lighter. The head is short, the forehead is wide, the acromion is raised, the drooping flesh is well developed, the body is long and wide, the chest is wide and deep, the ribs are round, and the waist is wide, flat and wide. The whole body is full of muscles
2019-01-16 -
Measurement of grass yield in grazing land Calculation of sheep load
(a) grass yield measurement grazing land grass yield is affected by factors such as season, climate, species and grazing use. It is important to determine the reasonable sheep load by measuring the grass yield of grazing land. Sample method can be used. The mowing quantity of 1 square meter pastureland is taken as a sample, at least 10 sample squares are sampled in each grazing plot, 10~20 sample squares are sampled in each large area, 50~100 sample squares are required for desert pastureland, and the actual number of sample squares is divided by the grass yield of sample squares.
2019-01-16 -
Symptoms, Pathology and Control techniques of Porcine Chlamydia trachomatis
Porcine chlamydia is a symptomatic infectious disease caused by Chlamydia psittaci. The clinical manifestations are abortion, premature delivery, stillbirth and weak piglets of pregnant sows; breeder boars
2019-01-16 -
Teach you how to give a pig an injection
Injecting pigs is the main method to prevent and treat pig diseases. Several injection methods are usually used, such as intramuscular injection, subcutaneous injection, intravenous injection, intraperitoneal injection and so on. Intramuscular injection is rich in blood vessels, and the injected solution is absorbed quickly. in addition, the distribution of sensory nerves in muscle is less, and the pain caused by intramuscular injection is less, so it is the most commonly used method of injection. The injection site is generally chosen in the muscular buttocks or neck. When injecting, first shearing, disinfecting, holding the syringe in the right hand, piercing the needle vertically. The depth depends on the size of the pig.
2019-01-16 -
Mutton processing method
The cured mutton is cut off the fat membrane and tendons of the mutton and cut into strips along the meat lines. Every 100 kg mutton ingredients: 5 kg of salt, 1 kg of granulated sugar, 1 kg of liquor, 0.3 kg of pepper and 100 g of five spices. Smear the ingredients evenly on the surface of the meat strips, marinate in the jar for 3 to 4 days, and turn the jar once. After getting out of the tank, wash off the auxiliary materials with clean water, hang them through the rope and air-dry or go into the drying room until they are dry and hard. Roll mutton selected mutton weighing about 20 kg to be slaughtered, skinned, head, hoof and removed.
2019-01-16 -
Porcine surgical disease-porcine hoof leaf inflammation
[etiology] there were few clinical cases of porcine hoof lobulitis in the past, and the incidence rate has increased in recent years. There are many factors inducing hoof leaf inflammation. At present, due to the application of various additives, pig feed formula nutrients are comprehensive and sufficient, feed is thick and palatable, pigs are gluttonous and sleepy, exercise is less, plus the increase of captivity and cage breeding, fat and fat are thickened in a short period of time, and the weight increases rapidly. In this way, the large pig body increases the pressure on the narrow hoof box, coupled with insufficient exercise, poor blood circulation of the hoof, and obstruction of the hoof machine. When digestive disorders occur, the gastrointestinal feed is fermented into histamine-like toxins, which is rich in
2019-01-16 -
Color diagnosis and Prevention techniques of cattle and Sheep
In the long-term animal husbandry and veterinary production practice, we have summed up nearly 30 years of experience and relevant reports, according to watching the color of cattle and sheep, we can diagnose the disease quite accurately, and adopt effective new technology to prevent and cure it at the same time. A good therapeutic effect can be obtained. 1 "cylinder color" diagnosis 1.1 "red eye disease" of cattle and sheep the pathogen of this disease is Haemophilus or conjunctival rickettsia, which can be infected in cattle and sheep. 1.1.1 symptoms occur simultaneously in both eyes, eyelid swelling, fear of light and tears: inflammation of conjunctiva, diffuse
2019-01-16 -
Closure of Shenzhong acupoint in the treatment of pig yellow and white dysentery
The acupoint is determined: the front end is adjacent to the nearest rib, and the back end is about 0.5-1.3 cm from the waist angle (hip joint). 1.2-1.8 cm away from the midline of the back, that is, the acupoint in the kidney. Choose No. 9 1-2 needle, the injection depth is 0.3-0.5 cm, the needle entry point must be accurate. According to the severity of the disease, 1-4 milliliters of procaine hydrochloride were injected with 0.5% ml of procaine hydrochloride. The rats were closed and injected 1-2 times a day, and the left and right kidney acupoints were injected alternately. 168 cases of piglet yellow dysentery were observed and treated, 155 cases were cured, the cure rate was 92.3%.
2019-01-16 -
Breeding cattle in spring
Spring is a busy season for cattle in service, and the forage grass is green and yellow. In addition, the cattle in service have experienced a long relationship of production and their physique has declined. If we do not strengthen feeding management and increase nutrition, it is easy to affect spring ploughing and delay farming time. Therefore, it is very important to do well the feeding and management of spring service cattle. In order to do a good job in the feeding and management of spring service cattle, we must pay attention to the following points. I. earnestly do a good job in the feeding and management of service cattle if the relations of production are not well maintained in the spring, they cannot be remedied by supplementary feeding during the service period.
2019-01-16 -
Fungal disease and other diseases in ducks-leptospirosis
Leptospirosis is a febrile and septic infectious disease caused by Borrelia burgdorferi in ducks, geese and other poultry and wild birds. The main clinicopathological features were fever, diarrhea, hepatomegaly and splenomegaly and necrosis. The disease has a high mortality rate, and sick birds often cause a large number of deaths. Leptospirosis occurs all over the world, but it is common in free-range poultry in tropical and subtropical regions. 1. Pathogen and epidemic characteristics the pathogen is Borrelia burgdorferi, which belongs to the order spirochetes and spirochetes. The helicoid can not be in the ordinary thin.
2019-01-16 -
Prevention and treatment of common bovine diseases: bovine rumen dilatation
Rumen distension is a disease caused by the rapid production of a large amount of gas in the rumen due to the intake of a large amount of easily fermented feed, resulting in the rapid enlargement of the rumen and the rapid expansion of the stomach wall. According to the etiology, it can be divided into primary and secondary. 1. The cause of primary rumen distension is mainly due to the intake of a large number of easily fermented forage, such as young and succulent forage, especially leguminous forage such as Artemisia mandshurica, alfalfa, or silage, root feed, mildew feed, frozen feed and fodder with rain, dew, frost and snow. In addition, poor management
2019-01-16 -
Attach importance to reasonable drinking water for pigs
First, the harm of insufficient drinking water of pigs is widespread in pig feeding, which only pays attention to feeding while neglecting drinking water, but they do not realize that drinking water and feeding are as important as feeding, even more important than feeding. The main harm of insufficient drinking water is: 1. Insufficient drinking water will lead to an increase in the incidence of intestinal tract in pigs. Farmers raise pigs, most of them use the traditional one-time feeding method of water supply, no matter what the weather conditions, regardless of the type of feed, do not give drinking water. Pigs often drink dirty water after they are thirsty due to lack of drinking water, especially in hot summer.
2019-01-16 -
Treatment of Porcine Influenza with traditional Chinese Medicine
Porcine influenza is an acute and highly contagious infectious disease of pigs caused by porcine influenza virus. It is characterized by sudden occurrence and rapid transmission. It often occurs in the whole group within a short period of 2-3 days. Pigs of different ages, genders and breeds are susceptible to infection. Most of them occur in late autumn and early spring when the weather changes rapidly, as well as in cold winter, with an incidence of about 100%. 63 cases of swine influenza were treated with Jingfang Baidu Powder and Yinqiao Powder. 60 cases were cured after 5 days, 2 cases were cured after 7 days, and 1 case was cured after 7 days.
2019-01-16 -
Effects of five trace elements on the quality of eggs
Egg quality includes external quality and internal quality such as egg weight, eggshell quality, eggshell color, egg shape index, egg protein height, yolk color, yolk membrane strength, chemical composition, functional properties, blood spot and meat spot, flavor and so on. The egg quality that producers and consumers pay most attention to is egg weight, eggshell quality, yolk color and functional properties. 1. Effects of zinc and manganese on egg quality there are few reports on the use of zinc alone in laying hens. Wedekind (1990, 1992) showed that amino acids
2019-01-16 -
Treatment of organochlorine poisoning in pigs
1. The cause is due to feeding pigs with feed soon after spraying 668 and 223 (DDT) pesticides, or using these pesticides to kill lice and toes, causing poisoning after being licked and eaten by pigs. two。 Pigs with acute poisoning symptoms, loss of appetite, foaming at the mouth, salivation, vomiting, depression, pupil dilation, grinding, spasm, barking, hindlimb or limb paralysis, shortness of breath, dysentery or anal incontinence, in severe cases, weak heart sound, heart paralysis and death. Chronic poisoning, loss of appetite, nausea, vomiting, skin flushing
2019-01-16 -
Prevention of porcine uricosis in cold days
Porcine uricosis is a metabolic disease caused by eating protein-containing concentrate in pigs, which often occurs in winter and early spring. Clinical symptoms mostly occur in suckling piglets and shelf pigs with strong physique, good development and exuberant appetite. The most acute pigs tend to die suddenly without showing any symptoms. Most of them show an acute process, showing sudden onset, loss of appetite or abstinence, and the body temperature begins to rise by about 0.5 degrees Celsius and quickly becomes normal or below the normal body temperature. Most of the diseased pigs were crippled in the hindlimb, while some pigs were crippled in the forelimb, which gradually developed into joint enlargement.
2019-01-16 -
American use of genetic Technology to accelerate the growth of Pigs
Researchers such as Professor Robert Swartz of Baylor School of Medicine in Houston used genetic technology to increase the growth rate of pigs by 40%, speed up the listing of pork and reduce feeding costs. The key to this technique is the use of a synthetic chemical that causes the pituitary gland of piglets to secrete more growth hormone than ordinary pigs, the journal Nature Biology reported. The researchers inserted the chemical into a biodegradable fragment of deoxyribonucleic acid, and then inserted the chemical into a fragment of DNA that could be degraded.
2019-01-16 -
Methods of prolonging the shelf life of mutton
Fresh mutton, especially the carcass just slaughtered, is suitable for the reproduction and growth of bacteria because of its suitable temperature and rich nutrition. Especially in hot weather and seasons, it will deteriorate within a few hours under natural conditions, and sometimes it begins to change color and corruption before it is even delivered to the market or sold out. Based on this situation, mutton just slaughtered must be cooled or refrigerated in time for short-term storage, slaughtering and selling, so that the meat temperature can be reduced to below 5 degrees Celsius in time, so as to reduce bacterial contamination and prolong the shelf life.
2019-01-16 -
Key points of Management of Pig Conservation
1. Ensure that each piglet can eat enough colostrum after birth, which can improve immunity, enhance resistance and reduce the incidence of disease. The temperature in the lying area of newborn piglets required 35-37 ℃, then decreased by 2-3 ℃ per week, and the temperature in the active area was 20-24 ℃. On the second day after birth, the piglets were injected with high-quality iron agent 100 mg and 150 mg iron. According to the actual situation of this field, the piglets can be injected with long-term injection 2-3 days before the onset of diarrhea.
2019-01-16