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13 Cards in this Set
- Front
- Back
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methionine |
first limiting amino acid for layers |
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Glycine (or its substitute serine) |
non-essential amino acid for layers |
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phase feeding |
minimizing the difference of productive and non productive individuals |
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calcium |
main mineral component of eggshell |
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2-3 times |
laying hen's requirement for calcium is....greater than that of non layer |
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.selecting calcium rich food .improving calcium absorption from the gut |
laying hens maximize their calcium absorbtion by... |
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common salt |
generally added to the diet of laying hens and is beneficial in counteracting cannabalism and feather pecking |
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excess Iron |
may give rise to rickets by rendering the phosphorus of the diet unavailable |
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Iodine and Manganese deficiency |
may lead to a reduction in hatchability of eggs and may also reduce the viability of the chicks after hatching |
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.breed differences .levels of calcium, phosphorus, (and phytate) in the diet |
requirements for manganese are influenced by... |
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zinc deficiency |
affects egg production and hatchability and result in the production of weak chicks with high mortality rate |
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.galvanised feeding .drinking troughs |
an important source of zinc in the past |
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Beta-carotene |
provides the color of the yolk |
