Microbial Proteins = come from both NPN & soluble protein in diet
AA available to
animal tissue are from escape and microbial protein
Ruminant & low protein: can survive because of urea and recycling
Ruminant and man: don't compete for food because NPN, an met AA
requirements.
Microbial and Escape protein: digested and absorbed in S.I.
Adult = 100% requirements can be met with microbial protein
Young (growing) or
lactating = only 75% requirements met with
microbial protein Þ to meet requiremetn (25%) feed insoluble (escape) proetin.
Decrease Protein Solubility escape value
1. heat it
2. coat
with fat - bacteria cannot get to it
3. chemically
treat, formaldehyde
Biological Value
|
Protein Source |
BV |
|
Egg Protein |
95 |
|
Milk Protein |
90 |
|
Meat Protein |
90 |
|
SBM Protein |
75 |
|
Meat & Bone Meal |
70 |
|
Cereal Grain |
60 |
|
|
|
Microbial protein ~75-80 BV
Look at BV and solubility.
Milk BV = 90 and is
soluble Þ ¯ value from 90 ® 75-80