Reasonable selection and application of feed additives

Feed additives are small or micronutrients or non-nutritive substances that are added to the feed to meet specific needs. According to different functions, it is divided into two categories: nutritional and non-nutritive additives. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

Nutritional additives include amino acids, vitamins, and minerals. There are 10 kinds of amino acids necessary for pigs. There are three kinds of amino acids, such as lysine, methionine and tryptophan, which are commonly lacking in feed. Farmers often use cereals, bran, and cake as raw materials for compound feed. Cereals contain low protein, high digestible energy, and are energy feeds. The crude protein content of the cakes is above 34%, which is a protein feed. When cottonseed cake and rapeseed cake are used as protein feed, lysine is the first limiting amino acid, and the effect of adding synthetic lysine is good, and the addition amount is 0.1% to 0.2%. When bean cake and fish meal are used as protein feed, the amino acid is balanced, and it is not necessary to add amino acid when the dosage is sufficient; if the dosage is small, lysine and methionine should be added appropriately. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

There are 14 kinds of vitamins necessary for livestock and poultry. Rural pigs, bran and green fodder account for a large proportion, generally less vitamin deficiency, and can be added or not added to growing and finishing pigs. However, multi-vitamins must be added to suckling pigs, piglets and large-volume pigs that consume less bran and green fodder. When selecting a composite additive variety, pay attention to the instructions on the package. It is best to purchase multi-dimensional additives and use them as described. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

Commonly used feeds have a low mineral content and must be artificially added. The animal body content is divided into constants and trace elements. The major elements are chlorine, sodium, calcium, phosphorus, magnesium, potassium, and the like. The salt contains chlorine and sodium. Adding salt can improve the taste of the pig, increase the feed intake, and regulate the physiological function of the body. It maintains the osmotic pressure and acid-base balance of the body fluid. The added amount is less than 0.5%, and more than 1% will be Causes discomfort in pigs, which can cause poisoning if it is too high. The bran in common feed has high phosphorus content. When the ratio is large, calcium-containing minerals such as calcium carbonate, stone powder, eggshell powder and shell powder can be added separately, and the added amount is about 1.2%. Among them, lactating sows can be added to 1.5%, and growing fattening pigs are suitable for 1%. For diets with a small proportion of bran, calcium and phosphorus should be added at the same time, such as bone meal and calcium hydrogen phosphate. The added amount is below 1.5%, among which the piglets should be high and the large pigs should be low. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

Insufficient calcium and phosphorus, the skeleton development of pigs is blocked, and it is easy to get cartilage; but too high will affect the utilization of other trace elements. If the calcium is too high, it will cause zinc deficiency, which shows rough skin, cracking and dandruff. Generally, the commonly used feeds of sulfur, magnesium and potassium are sufficient and need not be added. Trace elements commonly used are iron, zinc, copper, manganese, iodine, selenium, cobalt and other seven kinds, the amount of addition in the parts of a few thousand to a few thousand, too much added will inhibit growth, and even poisoning. Among them, copper and cobalt are more toxic, and selenium is highly toxic. The national feeding standards and feed industry standards are limited. According to the amount of feed per ton, the highest dose of copper is no more than 200 grams, and no more than 150 fattening pigs. Gram; selenium in the range of 0.1 to 0.3 grams. Cobalt is an important component of vitamin B12 and is synthesized by intestinal microbes in animals. The monogastric animal synthesizes it in the large intestine, and most of it is discharged into the body through the feces and cannot be absorbed. Therefore, it is of little significance to add cobalt to pigs and poultry. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

A wide variety of non-nutritive additives, including growth promoters, insect repellents, flavoring agents, etc. Among them, growth promoting agents are the largest category, including antibiotics, synthetic antibiotics, hormones, and enzyme preparations. Commonly used antibiotic additives are oxytetracycline, chlortetracycline, salinomycin, lignin, and bacitracin. There are many types of synthetic antibacterial drugs, such as quinolines, iodines, organic arsenic preparations, and nitrofurans. Antibiotics and synthetic antibacterials also have a growth-promoting effect. At present, the addition of olaquindox to domestic piglets is more common, and the effect of promoting sputum-promoting is better. The dosage of ton is 50-100 g; the porcine zinc supplementation is better, and the dosage of ton is 10-50 g. Insect repellents commonly use levamisole, albendazole, trichlorfon, deworming, etc., and pigs in rural areas are suitable for deworming once every two months. The use of high-copper additives has the combined effects of deworming, antibacterial, and growth-promoting. After regular deworming, it is no longer necessary to add insect repellent to the compound feed. Suckling pigs and piglets have insufficiency in gastric function. In order to improve feed intake and digestive function, flavoring agents and complex enzyme preparations can be added. These additives are available in the specialty market and can be added as indicated. When choosing to use additives, you should also master the following points: 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

(1) According to the nutritional defects of the commonly used feed, select the appropriate type of feed additive to achieve the nutritional balance and maximize the feed conversion rate. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

(2) According to the instructions on the package, master the usage. In the case of a large proportion of green roughage and a small amount of compound feed, the dosage can be slightly increased, but not excessively, and some are added in several times, which not only causes waste, but also inhibits growth, which is counterproductive. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

(3) For uniformity, a step-by-step method can be adopted. First, mix a small amount of powder with additives, then mix with 1/3 of the feed, and finally mix well with all the feed. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

(4) The mixed feed should be mixed with wet feed, not high temperature cooking, because additives such as vitamins, amino acids, antibiotics, and enzyme preparations are easily deactivated and wasted at high temperatures. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

(5) Store in a cool, dry place to prevent mold loss. In the case of large amount of mixing, long storage, and wet environment, it is preferable to add a mildewproof preparation to stabilize the feed quality. 9hZ China Feed Industry Information Network - based on feed, serving animal husbandry

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