Effects of Proportion of Supplemental Dietary Crude Protein Supplied by Urea on Performance and Carcass Characteristics of Beef Cattle Fed Steam-Flaked Corn-Based Diets with Wet Corn Gluten Feed11The authors thank Cargill, Inc. (Blair, NE) for partial financial support of the experiment; Cactus Feeders, Ltd. (Amarillo, TX) for supplying the cattle; Fort Dodge Animal Health (Overland Park, KS) and Intervet (Millsboro, DE) for supplying products used in cattle processing; Elanco Animal Heath (Indianapolis, IN) for supplying Rumensin and Tylan; and DSM Nutritional Products, Inc. (Parsippany, NJ) for supplying vitamins A and E. Appreciation also is expressed to K. Robinson and R. Rocha for their support in conducting this research.

Effects of mixing or daily alternation of dietary cottonseed (CS), corn gluten (CG) and soybean (SB) meals on wether performance were determined. Feed intake tended to be lowest for CG fed continuously. Daily gain (g) was 260, 342 and 327 for CG, CS and SB, 335, 329 and 317 for CG-CS, CG-SB and CS-SB mixes, and 269, 312 and 342 for CG then CS, CG then SB and CS then SB on alternate days, respectively. Feed:gain ratios did not differ among treatments. Key words: Sheep, performance, protein sources, feeding method

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Effect of different levels of dietary crude protein on the growth performance and carcass characteristics of commercial broilers at different phases of growth

Indian Journal of Animal Research ◽

10.18805/ijar.b-3255 ◽

2017 ◽

Author(s):

T. Srilatha ◽

V. Ravinder Reddy ◽

V. Chinni Preetam ◽

S.V. Rama Rao ◽

Y. Ramana Reddy

Keyword(s):

Amino Acids ◽

Growth Performance ◽

Feed Efficiency ◽

Crude Protein ◽

Body Weight Gain ◽

Carcass Characteristics ◽

Abdominal Fat ◽

Dietary Crude Protein ◽

Low Levels ◽

Different Levels

An experiment was conducted to find out the effect of different levels of crude protein in broiler diets during different phases. i.e., pre starter (0-11d), starter (12-21d) and finisher (22-42d). 360 day-old broilers (Vencobb) were procured from a commercial hatchery and fed either high or low dietary CP diets during pre-starter (23 and 21%) , starter (21 and 19%) and high, moderate or low CP diets during finisher ( 18.5, 17.5 and 16.5%) phases, for a total of 12 possible treatment combinations at d 42. The results showed that the broilers fed low levels of CP ( 21 and 19 %) had significantly(P less than 0.05) higher body weight gain (BWG) and feed intake (FI), and better feed efficiency over the diets with high levels of CP during pre-starter and starter phases (23 and 21%, respectively). The higher (18.5%) level of protein in the finisher phase showed higher BWG and best FCR compared to the lower levels (17.5 and 16.5%). Carcass characters were not influenced by the variation in dietary CP level tested except the abdominal fat weight which was significantly higher in broiler fed low CP diet compared to those fed higher levels of CP during all three phases. The results indicated that the broilers fed low CP diets supplemented with critical amino acids (21 and 19%) had beneficial effect on the growth performance during pre-starter and starter phase. The broilers showed an ability to respond to increase in dietary CP levels during finisher phase.

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