The National Research Council (NRC) of the United States proposed the recommended vitamin requirements for livestock under intensive management. The NRC's nutritional requirements form the basis for formulating vitamin requirements for commercial poultry in order to prevent vitamin deficiency in poultry. In order to determine the amount of vitamins added to chicken feed, it is often necessary to re-price them under different conditions of feeding and management.
In general, the NRC recommendation is considered the lowest level of vitamin supplements in chicken feed because the purpose of NRC is to prevent clinical vitamin deficiency. When considering the amount of vitamins in chicken feed, it is worth paying attention to the following points:
1. Some vitamins will be lost during processing of compound feeds;
2. Some vitamins will be lost when the feed storage conditions are poor
3. The vitamin requirement will increase greatly when disease or immune stress occurs;
4. The vitamin requirement will increase when the environmental conditions are poor;
5. A specific amount of vitamins should be supplied for modern commercial chicken species;
The goal of optimal vitamin nutrition is to enable the organism to fully realize its own genetic potential under modern management, premises and disease control conditions. The role of vitamins is to meet the metabolic needs of the body under these conditions, but also to meet the special needs of the body's immune system. What exactly is the optimal performance of commercial chicken depends on a series of measurable economic standards. The main criteria included growth rate, feed utilization rate, egg production rate, fertilization rate, hatching rate, and survival rate.
The range and content of vitamins contained in any of the raw materials required for the vitamins present in the feed ingredients are also the metabolic and physiological requirements of the animal, and are limited by the content of the raw materials. There are many substances in nature that can prevent or limit the use of certain vitamins by animals. Such substances are antagonists of vitamins. Vitamin antagonists are found in certain plant and animal products. Some of the drugs commonly used in livestock and poultry also have antagonism to vitamins. In addition, some molds and bacteria can also produce substances that can antagonize vitamins in their metabolic activities. . It is now known that vitamin antagonists can eliminate the activity of vitamins or prevent them from being absorbed in the gut of animals. Adding fats and oils as a source of energy for animals in compound feeds is a commonly used measure. High levels of unsaturated fatty acids in feeds increase the possibility of oxidation of fats, and oxidation of lipids can affect fat-soluble vitamins A, D, and E. The absorption of rancid fat can also inactivate biotin. All of these will have an effect on the effect and amount of vitamins.
In general, the NRC recommendation is considered the lowest level of vitamin supplements in chicken feed because the purpose of NRC is to prevent clinical vitamin deficiency. When considering the amount of vitamins in chicken feed, it is worth paying attention to the following points:
1. Some vitamins will be lost during processing of compound feeds;
2. Some vitamins will be lost when the feed storage conditions are poor
3. The vitamin requirement will increase greatly when disease or immune stress occurs;
4. The vitamin requirement will increase when the environmental conditions are poor;
5. A specific amount of vitamins should be supplied for modern commercial chicken species;
The goal of optimal vitamin nutrition is to enable the organism to fully realize its own genetic potential under modern management, premises and disease control conditions. The role of vitamins is to meet the metabolic needs of the body under these conditions, but also to meet the special needs of the body's immune system. What exactly is the optimal performance of commercial chicken depends on a series of measurable economic standards. The main criteria included growth rate, feed utilization rate, egg production rate, fertilization rate, hatching rate, and survival rate.
The range and content of vitamins contained in any of the raw materials required for the vitamins present in the feed ingredients are also the metabolic and physiological requirements of the animal, and are limited by the content of the raw materials. There are many substances in nature that can prevent or limit the use of certain vitamins by animals. Such substances are antagonists of vitamins. Vitamin antagonists are found in certain plant and animal products. Some of the drugs commonly used in livestock and poultry also have antagonism to vitamins. In addition, some molds and bacteria can also produce substances that can antagonize vitamins in their metabolic activities. . It is now known that vitamin antagonists can eliminate the activity of vitamins or prevent them from being absorbed in the gut of animals. Adding fats and oils as a source of energy for animals in compound feeds is a commonly used measure. High levels of unsaturated fatty acids in feeds increase the possibility of oxidation of fats, and oxidation of lipids can affect fat-soluble vitamins A, D, and E. The absorption of rancid fat can also inactivate biotin. All of these will have an effect on the effect and amount of vitamins.
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