Digestibility Assignment Key
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School
University of Wisconsin, River Falls *
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Course
213
Subject
Health Science
Date
Feb 20, 2024
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Pages
3
Uploaded by DeanGrasshopper3911
Name: KEY Lab Section: 121 13L 14L Spring 2024 Animal Science 231 Digestibility Assignment Use 2 decimal places throughout REVIEW: Use this section to work on you own. Using the lab data below, calculate percent ash and organic matter. Empty crucible | Sample weight | Weight of Ash weight | % Ash % Organic weight (grams) | (grams) crucible and (grams) matter ash (grams) 48.50 2.05 48.65 0 N, 5 '7} ]2 (; Z (flg Li oS5 — = 5'0 o4 = 7 8.6S- 48 L“Z@"’D" /o0=7 32 Below are your % nitrogen values from the lab. Calculate % protein in the feed sample. Feed sample Nitrogen, % Crude protein, % A 850 % (.25 PERE: Calculate the percent fat from the following lab data. Empty cup weight | Sample weight Ending cup Fat weight % Fat (grams) (grams) weight (grams) (grams) 49.25 7.00 51.45 2.20 2/, L/Z 5—/ S ’49’: 28 "y Calculate NFE from the following lab data. b o0 ) X (e0 ¥ NFE (4s-fed basis) = 100 — moisture — CP — EE — CF — ash NFE (DM basis) = 100 — CP — EE — CF - ash Sample | Moisture, % | CP,%asfed | EE, % asfed | CF,% asfed | Ash, % asfed | NFE, % as fed A 12.00 26.00 16.00 3.00 8.00 19 100-12 -26-l6- ?- &
NEW MATERIAL Digestibility 1. Using the information below, answer A-E. A cow consumes 40 Lb (as fed) of a diet. A. Calculate DMI for this cow: 34 1 40X 065 B. How much NDF is she consuming on a DMB?___ [ 9.3 8 Lb 4 xO.57 Diet information Nutrient Dry matter, % 85.00 Protein, % DM 14.00 NDF, % DM 57.00 She is also excreting 22 Lb (wet basis) of feces. Fecal information C. Calculate dry fecal weight: _ 5.5 Lb 22X 025 D. Calculate dry fecal NDF excretion: E. Calculate NDF digestibility (DMB): .58 1b 55%065 81,53 % (9. 38 Nutrient Dry matter, % 25.00 Protein, % DM 14.25 NDF, % DM 65.00 Tndoe — oukpu T intalce [0 2. You are conducting a digestibility experiment with broilers to determine the digestibility of your company’s new starter diet. A. Calculate % NFE on a DM basis for the diet below. Feedstuff | DM, % | CP,% Ash, % CF, % EE, % NFE, % Your Diet | 90.00 20.25 3.50 5.00 5.85 s 40 100 - 20.28~ 3. 50~ 5 -~ 58S B. Calculate the broiler’s intake information. Birds are fed 175 grams/per animal as fed each day. Diet DM intake, g/day CP intake g/day EE intake, g/day (DMB) (DMB) Your Diet /1S7 50 3.8% B 9. 2/ 175 % 6-90 /1ST.s0% 02025 1ST.SO0X 0.056 S
Fecal Data Component Your Diet Fecal output (wet), g/day 148.00 Fecal dry matter, % 36.00 Fecal crude protein, % DM 18.00 Fecal EE, % DM 5.00 C. Calculate the broiler’s output data (fecal data) using the information above. Diet Fecal DM output, Fecal CP output, Fecal EE output, g/day g/day (DMB) g/day (DMB) Your Diet 53. 26 ¥59 2o %8 x 036 53.28 K 0:(& 52 28X 005 D. Calculate the broiler’s digestibility. Diet Dry matter Protein digestibility, % | EE digestibility, % digestibility, % (DMB) (oMY Your Diet &l 27 L4 93 7112 157.50~ 5328 21.8%-9.57 G, 2/~ 2:.6b o \ e X100 x /0 157 S8 wey X0 G 2/ Total Digestible Nutrients (TDN) Calculate TDN for the following forage based on the chemical analysis of nutrients and the digestibility of each nutrient. Nutrient Nutrient, % Digestibility, % Calculated TDN, % Protein 20.00 90.00 20x0-90 (8 Fiber 15.00 42.00 bse 20 Nitrogen free extract 46.00 4.00 J 8Y Ether extract 10.00 8500 xp.25 /9./2 Ash ~ 900 —45.00 C TDN, % e He 7
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