Feeding pigs with raw materials not only saves manpower and financial resources, but also increases the feed intake of pigs and promotes weight gain. At the same time, it can reduce feed consumption and increase feed remuneration, but it must pay attention to the method of feeding.
1, the choice of raw feed can be selected as raw feed for the main grass seeds, such as corn, wheat, rice and other processing by-products, such as rice bran, wheat bran and so on. The nutrient loss of the above feed after cooking is more than 13%, but the soy seed feed, such as soybean, bean cake, peanut cake, bean dregs and other feeds contain an anti-trypsin, which can inhibit the decomposition of legume protein by trypsin in pigs. . Therefore, such feeds cannot be fed and must be fed after high temperature treatment.
2, the raw feeding method has to pay attention to the raw feeding can be divided into wet feeding and dry feeding two, the ratio of wet feeding and water can not exceed 1:2.5, otherwise it will reduce the secretion of digestive juice; reduce the activity of digestive enzymes, affect the digestion of feed The most suitable ratio for absorption should be 1:1. Mix the feed so that it can squeeze out the water droplets. Dry feeding is fed in the form of powder, and then fed after feeding. The benefits of dry feeding: First, the feed is not easy to deteriorate, and can be fed for a few days at a time to save labor; the second is to facilitate the production of compound feed to feed pigs.
3, raw materials to disinfect raw feed to pigs, should pay attention to washing and disinfection, so as not to infect parasitic insects. The method of disinfection can be soaked in lime water or potassium permanganate solution. The best way is to plant the feed site without pig manure or unfermented manure to prevent infection. Rapeseed cakes, cottonseed cakes, fresh cassava, buckwheat, etc., which contain certain toxins, generally need to be pulverized, soaked, fermented or silaged, and the toxins are removed before they can be fed.
4, raw material smash should be suitable for raw material pulverized particle diameter of 1.2 mm -1.8 mm is appropriate, this type of pig is refreshing to eat, large feed intake, long sputum fast. The diameter is less than 1 mm. When the pigs eat, the sticky mouth affects the palatability, and it is easy to cause gastric ulcer. The diameter is more than 2 mm. The roughness is poor and the palatability is poor. The pig does not like to eat.
5, the fine green raw materials should be fed separately when the pig is hungry, the secretion of digestive juice is the most vigorous. The concentrate has rich nutrition, small volume, less crude fiber, good palatability, high quality and easy digestion, so it should be selected to feed the concentrate. For example, if the green material is mixed and fed, the green material has a large volume and a large amount of water, which reduces the digestibility and absorption rate of the crude material, and the excessive moisture in the green material can dilute the digestive juice, thereby reducing the digestive function.
6, the amount of raw feed should be suitable for raw feed pigs, the amount of feed is different due to different growth stages and production performance of pigs. Piglets and fattening pigs can be eaten freely. In the case of breeding pigs, it is necessary to supply them quantitatively. Otherwise, due to excessive intake, fat deposition will affect the reproduction. Generally, the boars of non-breeding period should be controlled at a daily dose of 2 kg to 2.5 kg, and can be fed to 3 kg to 3.5 kg during the breeding period. For sows during pregnancy, the daily dose of concentrate is 2 kg - 2.5 kg, and the lactation period is 5 kg - 6 kg.
7. To supply enough pigs to drink dry materials, supply enough water. The amount of water in winter is 2 times to 3 times that of dry feed, 4 times in spring and autumn, and 5 times in summer. In particular, lactating sows and piglets should not be short of water, or they will affect the milk secretion of sows. The water quality should be clean, and the water temperature should be warm in winter and cool in summer.