At present, the relatively easy problem in pig production is to pay attention only to the nutritional level per kg of feed and not to the daily feed amount of feed. Although diets are formulated in strict accordance with their required nutritional levels, due to the fact that the daily feed amount cannot meet or exceed the requirements, either the length of the feeding period is increased, the proportion needed for the diet is increased, the feed utilization rate is reduced, or food is consumed and digestion is caused. Bad, causing a waste of feed.
Therefore, at the same time as science ingredients, we must pay attention to the scientific feeding of feed in order to give full play to its potential for weight gain and improve the utilization of feed. The feeding amount of the concentrates for growing and finishing pigs is usually about 4% of the weight of the pigs, and the lean-type pigs can be fed at 3.5% of their body weight after 60 kg; the expected daily weight gain and the expected utilization of the feed can also be used. (Feed/gain weight) Confirmation, Same-day gain (kg) Feed utilization (feed/gain) = Daily feed (kg).
Feeding is based on the growth and development laws of slow growth in the early period of the pig, rapid growth in the middle period, and slower growth in the later period. In order to obtain higher feed remuneration, straight-line fattening should be adopted to shorten the feeding period and save feed. At the same time, it is necessary to implement fine, green, and coarse feed mixes, and to implement mixed-fed raw feeds; in the number of feeds, two-day meals should be fed daily to reduce the consumption of energy and feed due to multiple feedings to stimulate pig movements. Loss of throwing, reducing feed utilization.
Temperature shut-offs should be kept clean and dry, winter is good for warmth, and summer is good for heat dissipation, creating a suitable growth environment for pigs to reduce the occurrence of diseases, reduce consumption, and improve feed utilization. The suitable temperature of the pig house is 17-21 °C, too high or too low will lead to reduced feed utilization.
The prevention and control of epidemics must be done to prevent and control pests and diseases and to minimize the incidence of disease, in order to increase the utilization of feed. In swine production, there is a considerable amount of pigs each year causing hidden wastage of feed due to chronic diseases and parasitic diseases. To this end, pig farming should be regularly immunized and regularly dewormed to ensure the healthy growth of pigs in order to improve the utilization of feed.
Pigs slaughtered at different stages of growth, bone, lean, fat, different growth intensity. In the pre-growth phase (before 60 kg), bones and lean meat grow faster, and the feed utilization rate is high; then with the increase of age and weight, fat grows more than lean meat, and the feed required for 1 kg of fat is longer than the length of 1 The feed needed for kilograms of lean meat is more than twice as high. Therefore, the longer the feeding cycle, the heavier the weight, and the lower the feed utilization rate. The suitable slaughter weight of ordinary hybrid pigs is 90-100 kilograms; the suitable slaughter weight of pure breed pigs is about 85 kilograms, and the suitable slaughter weight of local breeds with poor purity is about 75 kilograms.
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