YEAR 1. Broiler litter has been used quite
successfully as a feedstuff for both brood cows and stocker cattle.
Much research has been conducted at this site over the years with regard
to stocker cattle systems using broiler litter and other by-product feeds.
The current study is designed to evaluate the efficacy of replacing the litter
with rice mill feed. Rice mill feed is a by-product of the rice milling
industry whereby they create a product that contains approximately 1/3 rice
bran and 2/3 rice hulls. In general, rice bran has good nutritional
value and contains about 15% fat and the rice hulls have very little nutritional
value and can contain between 10 and 15% ash with high concentrations of silica.
These cattle were received at the station about
a week prior to being placed on their respective diets beginning Nov 15,
2001. The trial ended on March 7, 2002 after 112 days. Results
are summarized below:
Litter/corn
---------Rice Mill Feed/Corn--------- RMF/Soyhulls
50:50
60:40
50:50
40:60 50:50
ADG, lb/d
1.98
2.25
2.79
2.87 3.07
Feed Intake, lb/d
25.6
24.1
22.4
25.6 27.4
Hay Intake, lb/d
6.6
2.5
2.4
2.3
2.8
Using the following costs:
Hay 60ドル/ton
Litter 25ドル/ton
Rice Mill Feed 40ドル/ton
feed costs per pound of gain were as follows:
corn and soyhulls @ 70ドル/ton
$.41 $.31 $.25 $.28 $.27
corn and soyhulls @ 90ドル/ton
$.47
$.35
$.29
$.34 $.32
YEAR 2. In year 1 we showed that the broiler litter
could be replaced with rice mill feed. This year’s work was to evaluate
a higher level of rice mill feed and to look at the use of soyhulls instead
of corn.
These cattle were received at the station a few days prior
to being placed on their respective diets beginning Nov 19, 2002. The
trial was terminated on March 11, 2003 after 112 days. Results are
summarized below:
Litter/soyhulls -----Rice
Mill Feed/Soyhulls---------- RMF/Corn
50:50
70:30
60:40
50:50 50:50
ADG, lb/d
2.42
2.24
2.68
2.88 2.46
Feed Intake, lb/d
26.1
29.4
29.6
31.3 26.5
Hay Intake, lb/d
6.0
4.2
3.0
4.2
3.2
Using the following costs: Hay 60ドル/ton
Litter 25ドル/ton
Rice Mill Feed 40ドル/ton
feed costs per pound of gain were as follows:
corn and soyhulls @ 70ドル/ton
$.32
$.34
$.32
$.38
$.34