{"id":2261,"date":"2019-06-07t10:55:57","date_gmt":"2019-06-07t10:55:57","guid":{"rendered":"\/\/www.bkpromos.com\/?page_id=2261"},"modified":"2020-03-20t04:23:11","modified_gmt":"2020-03-20t04:23:11","slug":"feed-additives-for-poultry","status":"publish","type":"page","link":"\/\/www.bkpromos.com\/beplayapp网页 \/feeds-and-feeding-of-poultry\/feed-additives-for-poultry\/","title":{"rendered":"feed additives for poultry"},"content":{"rendered":"

written by:<\/strong> dr. jacquie jacob, university of kentucky<\/em><\/p>\n

all animals need to receive a nutritious diet in order to maintain good health and production. in the wild, animals consume a wide variety of feed ingredients. today the nutrient requirements of farm animals and the nutrients provided by different feed ingredients are well understood. diets for poultry generally consist of cereal grain (mostly corn in the u.s., but also wheat, barley, sorghum, and others are used elsewhere) and a protein source (most commonly soybean meal in the u.s. but there are also several animal and plant protein sources).<\/p>\n

the nutritional quality of a feed also depends on a variety of other factors, including feed presentation, microbial contamination, the content of antinutritional factors, digestibility, palatability, and intestinal healthfulness. a variety of feed additives are available to deal with these issues.<\/p>\n

feed presentation<\/h2>\n

antioxidants<\/h3>\n

fat included in poultry diets has a tendency to go rancid. the level of rancidity is affected by storage temperature, light, and the presence of trace minerals. trace minerals<\/strong> are essential nutrients typically added to feeds in the form of mineral premixes. rancidity is a chain reaction that proceeds at ever increasing speed, so it is essential to prevent rancidity as early as possible. adding antioxidants<\/strong> to feed is an effective way of doing so. by preventing oxidation, antioxidants are able to stop feed spoilage, and their preventative properties last until the reserves of the antioxidants are used up. compounds with antioxidant properties include ethoxyquin, butylhydroxytoluene (bht), butylhydroxyanisole (bha), vitamin c, and vitamin e.<\/p>\n

free-flowing agents<\/h3>\n

ingredients used in poultry feed range from dried cereals to oils, fats, molasses, and trace minerals. the flow characteristics of these ingredients are very different. free-flowing agents<\/strong> are substances added to feed to improve the pourability and storage stability of slow-flowing, moisture-sensitive materials. most free-flowing agents are fine particulate structures that are resistant to compression and exhibit chemical neutrality. the fine pbeplayapp网页 surround the pbeplayapp网页 of other ingredients in feed and prevent clumping. they also bind fluids in the feed. an example of a flowing agent is hydrated sodium aluminosilicate.<\/p>\n

pelleting additives<\/h3>\n

pelleting additives<\/strong> are similar to free-flowing agents. they are added to feeds prior to pelleting to help improve the quality of the pellets. these additives can, for example, reduce feed dust and help pellets better adhere.<\/p>\n

antinutritional factors and digestibility<\/h2>\n

many feedstuffs contain antinutritional factors that interfere with the utilization of dietary nutrients. some reduce protein digestibility, bind to dietary nutrients, or damage the gut wall. soybeans, for example, contain protease inhibitors that inhibit the activity of the enzymes needed to digest protein. raw soybeans contain trypsin inhibitors, but these antinutritional factors are inactivated by the heat generated in the production of soybean meal or when whole soybeans are roasted.<\/p>\n

corn and soybean meal are commonly used in commercial poultry diets in the united states. with the ever higher prices for corn and soybeans, many producers and companies are looking at alternative feed sources. although several alternatives exist, most of them contain one or more antinutritional factors.<\/p>\n