animal science help-see document

41. Figure the % digestible energy and the % metabolisable energy of a ration from the following data: 1000 grams of feed (dry matter) was fed and feed dry contains 3.00 Kcal/gram. 100 grams of feces (dry) was collected after feeding that feed, and it 

contained 5.00 Kcal/gram. The urine collected contained 250 Kcal. 

% DE? (2 pts) 

% ME? (2 pts)

42. Figure the % digestibility of the dry matter from the previous data. (2 pts)

80. Balance a ration for a 600 pound growing steer. Feed 3/4 pound of dry matter per 100 pounds of body weight as corn silage (0.75%). Meet the rest of his energy and protein needs from corn and soybean meal. Report the daily ration on both a dry matter and as-fed amount to feed. (show your work or I can't give you any partial credit). (The following table shows the requirements for TDN (13 lbs) and CP (2 

lbs), followed by the % of each nutrient in each feed). (12 pts) 

DM TDN,% TDN,lbs CP,% CP,lbs 

Requirements 13 2 

________________________________________________________________ 

Corn Silage 35 65.7 8.1 

Corn 86 93 10 SBM 90 87 50 

DM lbs As-Fed lbs 

corn silage _______ _______ 

corn _______ _______ 

SBM _______ _______ 

Are there any other nutrients we should be concerned about? (what?)

78. Balance a ration for a pig to contain 15% crude protein, 0.5% Phosphorus and 0.6% Calcium. Leave 3% initially for vitamins and minerals, and use corn, sorghum and soybean meal . Include 20% sorghum , 0.50% salt, vitamins at 10 pounds/ton and trace mineral premix at 2 pounds/ton. Add extra corn (on the "other" line) to finish filling the slack space. Calculate the %TDN in the ration. (12 pts) 

To save time, you don't have to calculate the amount of Dical and Limestone - - merely show how by setting up the equations. Then use the following figures: Dical = .93, Limestone = .88 

FEEDSTUFF ANALYSIS (%): 

Feed CP Ca P TDN DM Corn 9 .02 .28 90 88 sorghum 8 .02 .27 86 30 SBM 44 .25 .60 85 90 

Dical 0 22.0 18.5 0 100 Limestone 0 38.0 0 0 100 

Answers: 

Corn __________ Sorghum __________ SBM __________ Dical __________ Limestone __________ Salt __________ 

Vit premix __________ TM premix __________ other __________ 

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Total __________ 

79. What is the %TDN in Ration _______________