Calcium to Phosphorus Ratios in Broilers

i want to ask about relationship between calcium and available phosphor in laying hens diets

Good, thought provoking article. We shall estimate the digestibility of calcium from Calcium oxide, carbonate, sulphate, propionate etc. Their availability and cost factors. Thanks

Hello Roselina, very interesting and challenging paper for all those involved in animal feeding and nutrition, just like me. Let me make a couple of comments so you can please answer them if possible. You mention digestibilities of 34,1% and 67,9% for Ca for limestone and MCP in recent work at Maryland; but yet, correct me if I am wrong, on a weight to weight basis, we still provide more dCa with limestone don´t we?, assuming a Ca content of 38,6% and 17,8% for limestone and MCP respectively. The second comment would be how possible is to get digestibilities of Ca to be 62,7% (Tamim et al., 2004) vs just 34,1% in the recent Maryland work?. Many thanks for your always clear and good explanations. I have had the chance of listening lectures of yours a couple of times and always enjoyed them lots. Greetings from Madrid.