Reference no: EM132436594

Question 1: You are a dairy nutritionist formulating a diet for lactating dairy cows producing approximately 45 kg/d of milk. The diet is comprised by 27.1% corn silage, 27.1% alfalfa silage, 15.3% cottonseed meal, 20.5% ground corn, 3.5% soy hulls and 6.5% of other ingredients. Magnesium concentrations for corn silage, alfalfa silage, cottonseed meal, ground corn, and soy hulls are 0.17%, 0.28%, 0.61%, 0.12% and 0.25%, respectively. Magnesium requirements for lactating cows is 0.35%. Was the magnesium requirement met in this diet? If not, what is the amount of dolomitic limestone (10% Mg and 22% Ca) needed to fulfil the Mg requirements?

Question 2: Calcium requirements for lactating dairy cows is 0.88%. Calcium concentrations for corn silage, alfalfa silage, cottonseed meal, ground corn, and soy hulls are 0.28%, 1.36%, 0.20%, 0.04%, and 0.63%, respectively. Did the final diet obtained at exercise 1 fulfil these requirements? If not, use Calcium Carbonate (39.4% Ca) to adjust the diet.

Question 3: As a feed mill manager, you are formulating a poultry diet. Diet contains 70% corn, 15% soybean meal, 6% tallow, and 9% others. Phosphorus concentration in corn and soybean meal are 0.28% and 0.64%, respectively. Tallow does not have any phosphorus. Did this diet reach the available P requirements of 0.4%? If not, adjust the diet using Ammonium Phosphate (24.7% P).