A.S. Series 79-26
The aim of the present study is to determine whether certain metabolites of vitamin D3 (1,25-dihydroxycholecalciferol or 24,25-dihydroxycholecalciferol) added to the diet will affect shell quality in aged laying hens. This will be further evaluated by measurements of the carbonic anhydrase activity of the shell gland, blood serum calcium levels and calcium binding protein activity of the duodenum and shell gland.
Number of Pages
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Wright, Rose and Carlson, C. W., "Calcification Studies with Laying Hens" (1979). South Dakota Poultry Field Day Proceedings and Research Reports, 1979. 10.