The growing and fattening pigs adopt the group feeding method. The group feeding can increase the feed intake, make full use of the pighouse and accumulate various equipment, increase the labor productivity, and reduce the pig production cost. However, group feeding also has the disadvantage that pigs must fight each other to bite. When different types of pigs from different sources come together, they often have to compete with each other in order to distinguish between the winners and the losers. Pigs with large body weight and good constitution are dominant when they are fed. They often eat enough and even eat too much, but they have small weight and constitution. Weak pigs are disadvantaged and often do not eat enough. Therefore, finishing pigs should also be grouped rationally according to breed, body weight and individual strength. The difference between individuals in the same group of pigs should not be too large, the difference between the weight should not exceed 5-10 kilograms, the difference in young pigs should be smaller, generally should not exceed 4 to 5 kilograms, the difference between large pigs can be larger, but also Should not exceed 1 kg. After grouping, it is necessary to maintain the relative stability of the herd, and grouping or adjusting the circle will affect the pig's weight gain. Experiments have shown that once per cycle, it will extend the finishing period by about one week. Therefore, during the entire fattening period, mid-course and circle adjustments should be avoided as much as possible. Of course, if there is indeed a large difference between the group and the population due to diseases or growth and development disorders, it should be properly adjusted. Under normal circumstances, it should not be frequently mobilized.
The general practice of grouping or grouping is to keep the weak pigs in the original pigsty, merge the stronger pigs into other pigs, or leave fewer colonies in the original circle and put more pigs in the individual. The group went in and went. Do not go from a small number of weak pigs to another large number of pigs with strong constitutions. The circle should generally be selected at night. If necessary, combine with the pigsty to spray the pig with a liquid with strong odor. Circle and body surface. In the process of merging, attention should be paid to observing and strengthening management and adjustment to avoid or reduce biting.
In addition, the number of individuals raised in each lap should be reasonably determined, taking into account the size of the pigs, the environmental conditions of the sheds, and the manner in which the equipment is to be managed from the rear. If the number of heads per circle is too small, the space and equipment cannot be fully utilized, and the labor productivity is not high; if the number of heads per circle is too large and the captive density is too large, the effect of fattening will be affected. In actual pig production, pigs can compete for food according to how fast they eat and their temperament is 3 to 6 heads. Fast growth, and do a good job tuning work, make it a fixed point of eating, fixed excrement and urine, sleep at a certain point, so that the environment clean and sanitary.
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