First, pregnancy diagnosis
1. According to the estrus cycle and pregnancy symptoms diagnosis This method does not use any instruments, drugs, is a simple and easy method, widely used in pig production. If the estrus does not reappear after about three weeks after sow mating, and there is an increase in appetite, hair is smooth and bright, phlegm increase, tame temperament, action is stable, snooze, the tail is drooping naturally, the vulva shrinks into a line, drive away Walking with the tail and other phenomena, it is initially concluded that pregnancy has occurred. However, attention should be paid to the fact that individual sows have “false estrus†phenomenon, “different estrus†is different from true estrus, and the symptoms of estrus are not obvious, and the estrus time is short. They do not want to approach boars and do not accept climbing. Diagnosis of pregnancy using this method requires a certain amount of production experience.
2. Hormone injection pregnancy diagnosis 16 to 17 days after sow mating, the ear root subcutaneous injection of 3 to 5 ml of synthetic estrogen, after the injection of estrus symptoms is empty sows, 5 days without estrus for pregnant sows. Because the pregnant sow has a corpus luteum on the ovary and secretes progesterone, the injection of estrogen does not show estrus. If the sow does not have a pregnancy, the corpus luteum disappears in about 18 days, and estrus symptoms occur when the estrogen is injected 16 days after mating. However, it should be noted that caution must be exercised when using this method. Improper use may cause miscarriage or reproductive problems.
Second, prenatal preparation and production technology
1. Observed on labor (1) Changes in the breast. Sow 15 to 20 days before delivery, the breasts begin to sag and bulge from the posterior to the front, and the base of the sow in the abdomen bulges into two bands. The skin of the breast is purple and red, and the two rows of nipples are open to both sides. . Prenatal milking of the nipples is done with milk. When the clear milk is extruded, the farrowing is within 2 to 3 days, and when the thick yellow-white milk is extruded, the labor has arrived. However, there are also individual sows that secrete milk after delivery. Therefore, it is necessary to combine other pre-labor performance to determine the time of labor. (2) Changes in the vulva. 3 to 5 days before the sow's perinatal period, the genital area begins to swell and sag, and depressions appear on both sides of the tail. This is a sign of the opening of the pelvis. Excretion of excreta increases. (3) Neurological symptoms. The sows are neurologically sensitive and unnerving before delivery, and they are unstable and uneasy to eat. Some of the sows also rank grass as nests or arches and arches, and sows with strong nurses become fierce and inaccessible. Some still bite people, causing difficulties for artificial births.
2. Prenatal preparation (1) The delivery room is cleaned and cleared. Pigs into the delivery room, the delivery room to be thoroughly cleaned and disinfected with disinfectants such as pyrotechnic acid, the best conditions for the best disinfection with fumigation. (2) equipment. Potassium permanganate, iodine, clean towels, and lighting lamps should be prepared before delivery. In winter, piglet insulation boxes, infrared lamps, or electric heating plates should be prepared. (3) Pig body cleaning. One week before farrowing, the gestating sow is rushed to the delivery room, and the sow is flushed before the upper bed. This ensures the cleanliness of the birth bed and reduces the disease of the newborn piglet.
3. Confinement techniques After the fetus enters the birth canal, the majority of the umbilical cord is disconnected from the placenta, and the oxygen supplied to the piglets through the umbilical cord is stopped. Only the piglets are allowed to breathe after the birth. If the fetus stays too long in the birth canal and cannot produce it in time, there is a risk of sudden death. When the fetus is born, the head comes out first and is called the front head, which accounts for about 60% of the total number of litters. The buttocks that come out first are called the hips, which make up about 40% of the total number of litters. Both of these are normal. Fetal position. Keeping the sow quiet during littering can prevent dystocia and shorten the birth time. After the piglets are born, first remove the mucus from the nose and mouth with a clean towel, breathe the piglets as soon as possible, then dry the whole body. If the weather is colder, immediately put the piglets in an incubator and dry them. When the piglet umbilical cord ceases to fluctuate, the umbilicus can be cut off. The method is to first let the piglet lie down, squeeze the blood in the umbilical cord repeatedly towards the abdomen of the piglet, and cut it 5 to 6 cm away from the abdomen of the abdomen. The section was disinfected with 5% iodine. After eating piglets, colostrum should be eaten as soon as possible after birth, which will enable the piglets to obtain nutrients, increase resistance, and promote sow's sow birth rate.
Large Capacity Solvent Recovery Machine
Large capacity Solvent Recovery Machine
Characteristic
â—Explosion-proof electric equipment: in compliance with Chinese safety standards (CNEX) and European standards (ATEX), worry-free and safe for use;
â—Self-developed high-end standardized production, stable and durable quality assured, has good performance;
â—High quality durable stainless steel tank, prevent chemical corrosion; two-tier structure, indirect heating, reinforcement barrelhead design, precise temperature control, explosion-proof, anti-leakage;
â—Heating Method: heat medium (heat transfer oils) indirect heating;
â—Digital heating temperature controller: advanced numerical performance, safety intuitive, accurate and convenient heating temperature control;
â—Multiple operational safety protection functions: pre-set temperature shutdown function; timer shut off function; ultra-high temperature protection features; high-voltage protection function; power failure protection function.
â—A 24-hour automatic cycle operation functions: a single cycle or continuous cycle operation, a 24-hour automatic cycle of operation.
â—Vacuum decompression recovery features: built-in vacuum (pump) devices, heating, condensation, vacuum, storage features and variety of functions in one machine; heating temperature is low, saving heating electricity; sealed recycling, reduces evaporation, prevents leakage; right volatility and easy to decompose, toxic or high boiling point solvent recovery with excellent effect.
â—Automatic feeding and automatic cleaning residue functions: automatic or manual control feeding, without opening the cover feeding; cleaning of residue without need to open the lid, after recovery emptying is done by air pressure, high efficiency, low solvent evaporation, saves energy and cost of labor.
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