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The Effects Of Zinc Supplementation From Two Sources On Egg Quality And Bone Health In Laying Hens, Kelli Marie Martin
The Effects Of Zinc Supplementation From Two Sources On Egg Quality And Bone Health In Laying Hens, Kelli Marie Martin
Department of Animal Science: Dissertations, Theses, and Student Research
The objective of this study was to compare zinc sources and levels of supplementation on laying hen performance. Bovan White Leghorn hens were fed one of six dietary treatments in a 2x3 factorial arrangement consisting of two zinc sources (Availa®Zn or zinc sulfate) and three levels (40, 80, or 120 ppm). Treatments were randomly assigned to 48 cages with five hens/cage. Blocks provided eight replicates/treatment. Hens were housed in a tiered manure belt housing system providing 97.2 cm2/hen. Hens were given 110 g/hen/day of feed ad libitum. Feed intake, egg production, egg weights, egg components, eggshell strength, body …
Poultry Progress: How Long Should A Chicken Live?, F. E. Mussehl
Poultry Progress: How Long Should A Chicken Live?, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Circulars
Increased laying flock mortality has disturbed thoughtful hatcherymen, producers, processors, and research workers for several years, and very properly so, because hens which die before their time serve no useful purpose, except to raise in our minds the question, "Why?"