First, scientific feeding. At present, in pig production, the more easily overlooked issue is to pay attention only to the nutritional level per kilogram of feed and not to the daily feed amount of feed. At the same time as scientific 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 feed amount of the concentrates for growing and finishing pigs is generally 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 expected feed utilization rate can also be used. (Feed/gain) Determined, immediate gain (kg) Feed utilization (feed/gain) = daily feed (kg).
Second, science feeding. According to the growth and development rules of the early growth of the pig, the fast growth in the middle period, and the slower growth in the later period, in order to obtain a higher feed remuneration, a straight-line fattening method should be adopted to shorten the feeding period and save the feed. At the same time, we must implement fine, green, and coarse feed mixes, and implement mixed feeds. In feeding times, a two-day feeding system was adopted to reduce the increase in exercise for stimulating pigs due to multiple feedings, thereby increasing energy consumption and feed loss, and reducing feed utilization.
Third, suitable temperature. The pens should be kept clean and dry, warm in the winter and cool in the summer to create a suitable growth environment for the pigs to reduce the occurrence of diseases, reduce maintenance and improve feed utilization. The suitable temperature for general pigs is 17 to 21°C. Excessively high or low pigs have adverse effects on feed utilization.
Fourth, do a good job of prevention. We must do a good job of prevention and control of pests and deworming, minimize the incidence rate, in order to improve the utilization of feed. In swine production, a considerable number of pigs each year suffer from implicit waste of feed caused by chronic diseases and parasitic diseases. To this end, pigs should be well-prepared for immunization and regular deworming to ensure the healthy growth of pigs in order to improve the utilization of feed.
Fifth, timely slaughter. Pigs have different growth intensities of bones, lean meat, and fat at different stages of growth. In the pre-growth phase (before 60 kg), the bones and lean meat grow faster and the feed utilization rate is higher; then with the increase of age and weight, the fat grows more than the lean meat, and the feed required for the length of 1 kg fat is longer than 1 Kilograms of lean meat are 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 general cross-breeding pigs is 90-100 kg; the breeds cultivated in Chinese pigs are about 85 kg, and the cultivation is low and the uncultivated varieties are about 75 kg.
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