Good
Steward
Form 7. Manure Nutrient Production:
Nutrient Balance Estimate of Manure Nutrient Excretion
a.
Animal Group
Example:1,000
beef finisher
b.
Group Daily
Feed Intake
(lbs./day)
27,000 lbs.
DM/day
Manure storage system:
Feed Nutrient Concentration (%)
c.
d.
e.
Crude
N1
P
Protein
(c ÷ 6.25)
13.5%
13.5 ÷ 6.25
0.35%
= 2.16%
II. Nutrients Retained by Animal
a.
h.
i.
Animal Group Maximum one- Average Daily
time capacity
Gain / animal
(# of animals)
(lbs./day)
(see Form 2)
1,000
4.1 lbs./d
Example: Beef
Live Weight Nutrient
Concentration
j.
k.
N
P
0.026
0.0070
Beef
0.026
0.0070
Dairy
0.027
0.0075
Pork
0.024
0.0050
Hens
0.028
0.0058
Broilers
0.028
0.0058
Turkeys
0.028
0.0059
III. Nutrients Retained by Animal Products
a.
n.
Nutrient Concentration of
Animal Product Daily Production
Animal Products
(lbs./day)
o.
p.
(see Form 3)
Nitrogen
Phosphorus
(lb.N / lb. prod.) (lb.P / lb. prod.)
Milk1
0.0050
0.0010
Eggs1
0.0166
0.0021
IV. Nutrient Excretion by Livestock
a. Animal
s.
Group/Product
Days Fed per
t.
Year (days / yr.)
N [s x ( f – l )] or
(Forms 2 or 3)
[s x ( f – q )] (lbs./yr.)
350 days/year
Example: Beef
350 x (583 – 107)
Finisher
= 167,000 lbs /year
Total
Total Nutrient in Feed (lbs./day)
f.
g.
Daily N fed
Daily P fed
(b x d ÷ 100)
(b x e ÷ 100)
27,000 X 2.16 ÷ 100= 27,000 X 0.35 ÷ 100 =
583 lbs./day
94.5 lbs./day
Daily Nutrients Retained by Animal
(lbs/day)
l.
m.
Nitrogen
Phosphorus
(h x i x j)
(h x i x k)
1,000 X 4.1 X 0.026
1,000 X 4.1 X 0.0070 =
= 107 lbs./d
28.7 lbs./d
Nutrients Retained by Animal Products
(lbs./day)
q.
r.
Nitrogen
Phosphorus
(n x o)
( n x p)
Annual Nutrient Excretion
u.
P [s x ( g – m )] or
[s x ( g – r )] (lbs./yr.)
350 x (94.5 – 28.7)
= 23,000 lbs./year
w.
v.
P2O52
(u x 2.3) (lbs./yr.)
23,000 x 2.3 =.
53,000 lbs P2O5 / year
x.
1. N in feed = Protein ÷ 6.25, N in milk = Protein ÷ 6.38. Nitrogen content of 0.0050 assumes 3.2% protein in milk, N in eggs =
Protein ÷ 6.25. Nitrogen content of 0.0166 assumes 10.4% protein in eggs.
2. 2. Lbs. P2O5 = lbs. P X 2.3
Strategic Plan
I. Feed Nutrient Intake