Reference no: EM132436706

A researcher dried a feedstuff and determined that it contained 10% moisture. He took 1 gram (dry) of it and combusted it in the bomb calorimeter. the calorimeter contains 1 kg of water. The temperature was raised 2.5 degrees centigrade.

Two kilograms (2000 grams) of dry matter of the material was fed to a pig each day for several days. The fecal collections of the pig averaged 200 grams dried per day for the last few days. The feedstuff analyzed 1.21% nitrogen (dry basis); the feces (dry basis) analyzed 5.99 % nitrogen. (HINT: the feedstuff contained _(a)__ grams protein, the feces contained _(b)__ grams protein.)

One gram of dried feces combusted in the bomb calorimeter raised the temperature 2.5 degrees C.

Hints: 1 Cal is the energy to raise 1 g of H2O 1 degree C. Total energy (or protein) is the amount in 1 g times # of g

DE = Energy Feed - Energy Feces; ME = Energy Feed - Energy Feces - Energy Urine

Net Energy = Energy Feed - Energy Feces - Energy Urine - Heat Increment

*express each as one Kcal,&, or Kcal/Kg

For almost anything (Dry matter, N, CP, Energy):

Apparent Digestibility = ((Amount in feed - Amount in feces) / Amount in feed) x 100

1. WHAT is the Apparent Digestibility of the DRY MATTER in the Feedstuff (PERCENT)? _____

2. WHAT is the APPARENT DIGESTIBILITY of PROTEIN (PERCENT)? _____

3. WHAT is the APPARENT DIGESTIBILITY of the ENERGY in the FEED (%)? _____

4. WHAT is the APPARENT DIGESTIBLE ENERGY value of the FEEDSTUFF in KCal/Kg of Dry Matter? (CAREFUL NOW. THINK! DON'T JUST USE FORMULAS.) _____

Metabolizable Energy (ME) and Net Energy:

The Urine was collected and analyzed to contain 2 Kcal/ml and the excretion was 100 ml.

5. What is the apparent metabolizable energy value of the feed (%)? _____

6. What is the apparent ME value of the feed in Kcal/Kg of feed? _____

If the Heat Increment amount to 100 Kcal, what is the Net Energy?

7. In %? _____

8. In Kcal/Kg of feed? _____