Ask for advice on the feeding and management techniques of weaned piglets?

(agricultural Wealth Network) ask for advice on the feeding and management techniques of weaned piglets? -- (1) the feeding of weaned piglets is in a strong stage of growth and development, various tissues and organs need to be further developed, and the function needs to be further improved, especially the digestive organs. Pig milk is easily digested and absorbed by piglets, and its digestibility can be as high as 100%, and the nutrients needed after weaning come entirely from feed. The main energy source of milk fat is replaced by grain starch, casein which can be completely digested and absorbed becomes plant protein with low digestibility, and the feed also contains a certain amount of crude fiber. According to studies, when weaned piglets eat more feed, the protein and minerals in them are easy to combine with free hydrochloric acid in the stomach of piglets, which can not fully inhibit the reproduction of Escherichia coli in the digestive tract and often cause diarrhea. In order to make weaned piglets adapt to post-weaning feed as soon as possible and reduce the adverse effects caused by weaning, in addition to early compulsory feeding for weaning piglets and reducing the supply of breast milk before weaning (feeding sows before weaning), in addition to forcing piglets to eat more subsidized feed before weaning, it is also necessary to make the transition of feed and feeding methods for piglets. The transition of feed is that piglets should be kept unchanged within 2 weeks of weaning (still fed with supplementary feed during lactation), and appropriate amounts of antibiotics, vitamins and amino acids should be added to reduce stress reaction. After 2 weeks, piglets should be gradually transferred to feed for weaned piglets. During the transition of feeding methods, piglets should be fed at a limited amount for 3 to 5 days after weaning, and the average feed intake is 160g for 5 days. It is best to install automatic drinking fountain in the weaning piglet pen to ensure that piglets are provided with clean drinking water at any time. When weaning piglets eat a large amount of dry feed, they often feel thirsty and need to drink more water. if the water supply is insufficient, it will not only affect the normal growth and development of piglets, but also cause diarrhea and other diseases caused by drinking sewage. -- (2) Management of weaned piglets 1. Most of the piglets divided into groups are rectangular, with a length of 1.8 ~ 2.0m, a width of 1.7m and an area of 3.06m ~ 3.40m. A total of 810 young pigs were raised in each column. Piglets are very unstable in the first 1-2 days after weaning and often hiss to find sows, especially at night. In order to stabilize the uneasy mood of piglets and reduce the stress loss, it is best to adopt the "original circle breeding method" of not moving away from the original circle and not mixing the group and nesting. When the piglets were weaned, the sows were transferred back to the empty sow house, and the piglets were still kept in the delivery room for a period of time, and then transferred to the piglet house after the piglets adapted. Due to the original environment and the original litter piglets, weaning stimulation can be reduced. The disadvantage of this method is that the utilization rate of the delivery room is reduced, and the number of delivery columns in the delivery room needs to be increased when the field is built. The factory pig production adopts the balanced production mode throughout the year, the design of each process stage is strict, and the flow operation is carried out. The weaned piglets were immediately transferred to the piglet breeding house, and the pigs in the delivery room were all in and out. The pigs were cleaned and disinfected immediately after they were transferred, and then transferred to the sows waiting for delivery. When weaning piglets are transferred to another group, they are generally reared in the original litter, that is, the original litter piglets (excluding individual dysplastic individuals) are transferred to the breeding shed and raised in the same column. If there are too many or too few piglets in the original litter and need to be re-grouped, they can be divided into groups according to their body weight and strength, and the difference in body weight of piglets in the same group should not exceed 1~2kg. The weak piglets in each litter were merged into small groups and raised separately. Gregarious piglets will have the phenomenon of fighting order, which can be taken care of properly to prevent bites. two。 Good environmental conditions. The main results are as follows: (1) the optimum ambient temperature for weaned pigs is 21 ℃ ~ 22 ℃ at the age of 30 ~ 40 days, 21 ℃ at the age of 60 days at 41 ~ 90 days, and 20 ℃ at the age of 60 ~ 90 days. In order to maintain the above temperature, heat preservation measures should be taken in winter. In addition to paying attention to the windproof and heat preservation of the house and increasing the number of pigs in the house to maintain the temperature, it is best to install heating equipment, such as heating (including soil heating), hot air stove and coal stove. In the hot summer, it is necessary to prevent the heat and cool down, and the cooling methods such as spray, shower and ventilation can be adopted. in recent years, many pig houses have adopted longitudinal ventilation and achieved good results. (2) excessive humidity in the nursery can increase the adverse effects of cold and heat on pigs. Dampness is beneficial to the breeding of pathogenic microorganisms and can cause a variety of diseases in piglets. The suitable relative humidity of weaning piggery is 65%-75%. (3) the inside and outside of the clean and sanitary pig house should be cleaned regularly, disinfected regularly, kill germs and prevent infectious diseases. (4) keeping the air fresh, the toxic effect of harmful gases in the air of piggery on pigs is long-term, continuous and cumulative. Timely removal and treatment of organic matter such as feces and urine in the shed, reduce the production of harmful gases such as ammonia and hydrogen sulfide, control the amount of ventilation, remove the dirty air in the house, and keep the air fresh. 3. The feeding, recumbent position, drinking water and excretion area of newly weaned piglets have not yet formed a fixed position, so it is necessary to strengthen training to form an ideal sleeping and excretion area. This can not only maintain the hygiene of the column, but also facilitate cleaning. The piglet breeding pen is preferably rectangular (to facilitate the training zone), with an automatic eating trough at one end of the middle aisle and an automatic drinking fountain at the other end, with a sleeping area on one side near the trough and an excretion area on the other side (as shown in figure 9-3). The method of training is that the feces in the excretion area are not cleaned temporarily and the piglets are induced to excrete. The faeces in other areas should be cleaned up in time. When piglets are active, they are coaxed and reprimanded with sticks to those piglets that cannot be excreted at the specified place. When piglets are sleeping, they can be regularly coaxed to the fixed area for excretion. After a week of training, the conditioned reflexes of fixed-point sleep and excretion can be established. 4. Newly weaned piglets with iron rings often bite their tails, suck their ears and prepuce, which is mainly caused by the attempt to continue sucking, and of course, it is also caused by inadequate feed nutrition, excessive feeding density and poor ventilation stress. The way to prevent it is to improve the feeding and management conditions while setting up toys for piglets to distract attention. There are two kinds of play: the toy ball placed in the column and the iron ring training suspended in the air. the ball is easy to get dirty and unsanitary. It is best to hang two iron drills connected by iron rings in each column, and it is appropriate for piglets to bite their heads at a height, which can not only prevent the occurrence of evil arthralgia such as tail biting, but also meet the active and playful needs of piglets. 5. Prevent injection of swine fever, porcine erysipelas, porcine lung disease and piglet paratyphoid vaccine at 60 days of age, and remove internal and external parasites before transformation.