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Mastering the amount of feed-grade methionine for feeding livestock and poultry
The broiler chicken diet should include 0.1-2.5% of a certain ingredient, while for laying hens, the recommended amount is 0.1-0.2%. During the egg-producing phase, it's best to add 0.1%, and during the peak egg-laying period, 0.05% is sufficient. For broiler feed, adding 3-5% fat sources like butter, lard, or soybean oil can improve performance and growth. In swine nutrition, methionine is typically used at 50% of the lysine level, and it's crucial to ensure enough methionine is included in the feed for broiler hens. If rapeseed cake or cottonseed cake replaces soybean meal, an additional 20% lysine should be added to maintain nutritional balance. On the other hand, if fish meal is used instead of soybean meal, the lysine requirement can be reduced by about 20%. When formulating feed rations, it's important to adjust based on the pig breed, growth stage, and available ingredients to maximize feeding efficiency and economic returns. Flexibility in formulation helps achieve better results and adapt to changing conditions in the production environment.