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pro vyhledávání: '"J. K. W. M. Sparla"'
Publikováno v:
Poultry Science. 89:522-529
Different types (light to heavy) of laying hens are used in practice. There are questions about the optimum level of balanced protein (BP) supply in feed for different types of hens. Therefore, a broad range of amino acids intake levels [550 to 800 m