Farming pigs often mention some experiences. It is undeniable that there are many traditional pig raising experiences in rural areas that are worth learning from, but there are also many experiences that are not reliable.
1. "Cook and easy long oil." The traditional method of raising pigs is to feed and feed the pigs. It is thought that pigs can eat long-serve oils. In fact, pigs cooked and fed are time-consuming, labor-intensive, consume more material, grow slowly, and have low feed utilization. During the cooking process, 20% of the nutrients are lost, and the loss of green feed is even greater. Sluggish, raw and can greatly reduce energy consumption and labor costs, scientific and reasonable feeding, can shorten the feeding period of 3 to 5 months.
2. "The winter solstice kills pigs as bacon." In the rural areas, it is generally believed that the taste of bacon in the winter solstice is the best. Therefore, the fat pigs that can be slaughtered before the winter solstice should be slaughtered during the winter solstice. The optimum temperature for pig growth is 18°C~23°C. Below 18°C, pigs grow slowly. In winter, temperatures drop. In consideration of feed costs, pigs should be slaughtered in advance.
3. The "leaner the better" the feed. Diluted feed has more moisture, which reduces the temperature of the pig's gastrointestinal tract and increases the consumption of pig heat energy. The pig excretes fast, which is not conducive to digestion and absorption, and reduces the conversion rate of feed.
4. Feeding pigs, "the more full the better." Eating too much of a pig affects the next appetite and wastes feed. Pig's appetite law: eat much at night, followed by morning, at least noon. The best meal for every meal is 90%.
5. Pigs are "greater the more willing to grow." The growth of pigs has its own rules, and pigs over 100 kg grow slowly. Therefore, pigs should be slaughtered to a certain extent according to different breeds and be slaughtered in time. Generally, the pigs should be slaughtered at a weight of 90 to 100 kilograms. Fat pigs are overweight, feed consumption is high, feeding costs are high, and benefits are low.
Human chorionic gonadotropin is a hormone for the maternal recognition of pregnancy produced by trophoblast cells
Human chorionic gonadotropin (HCG) is a glycoprotein secreted by trophoblast cells of the placenta And β dimer proteins. The molecular weight of glycoprotein hormone 36700, A. Pituitary, FSH, follicle stimulating hormone, LH (luteinizing hormone) and TSH (thyroid stimulating hormone) are basically similar, So they can cross-react with each other, while the structure of β subunit is not similar. In mature women, the fertilized ova move to the uterine cavity for implantation and form embryos. In the process of development and growth into the fetus, the placental syncytiotrophoblast cells produce a large amount of HCG, which can be excreted into urine through the blood circulation of pregnant women. Serum and urine HCG levels rise Rapidly from 1 to 2.5 weeks of gestation, reaching a peak at 8 weeks of gestation and dropping to moderate levels at 4 months of gestation, which remain at the end of gestation. At present, the commonly used detection methods are: latex aggregation inhibition test and hemagglutination inhibition test; Radioimmunoassay (RIA); Enzyme linked immunosorbent assay (ELISA); Monoclonal antibody colloidal gold test
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