猪的习惯(国外英文资料).docVIP

猪的习性 The behavior of the pig One. Fertility is strong and generations are short Pigs early sexual maturity, local varieties in China 3-4 months after birth, varieties grown after birth, 5 -- 6 months reach sexual maturity, 6-8 months can first breeding. Pig is a perennial rutting livestock for many times, by the seasons. The climate is small, the influence of all the year round can reproduce breeding. Pigs pregnancy is short, the average is 114 days, sows can give birth a year 2, through technical processing can achieve an annual output of 3 or 5 tires for two years. The pig is a multi-child animal, usually produces about 10 heads per tyre. Our countrys taihu pig is famous for its high fertility, with more than 15 per child. If the gilt in 6-8 months after mating, 9-11 months breed, this way of using first-born stallion, generation gap is only one year. Usually 1-1.5 years. The breeding force of the species is higher than the sow, which can be used in the same period. Second, it grows fast and the feed is paid high Pigs and horses. An ox. Compared with sheep, the growth of the embryo and the long-term growth of the embryo is shorter, but the growth intensity is greater. Due to the short period of pregnancy and the number of piglets, the embryo stage is not as developed as the horse. An ox. The sheep. Show the birth weight is small, only 1 kg, about 1% of the adult body weight, and the function of each organ imperfect, disease resistance, poor life force, need good care. Pigs born after growth quickly, for the birth weight of piglets born after 1 months weight 5-6 times, 2 months of age 13-15 times for birth weight, weight of 1 months weight of 2-3 times, the relative growth strength. The pig will weigh 90 to 100 kg in the next six months, the best weight for the post. The reserve pig can reach 50 to 60 percent of the adult body weight in August, which is suitable for breeding and gaining weight. Pigs not only grow fast, but also use all kinds of feed to convert to