EurekaMag.com logo
+ Site Statistics
References:
53,623,987
Abstracts:
29,492,080
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Nutrient requirements of finishing beef cattle: I. Protein requirements for growth and maintenance



Nutrient requirements of finishing beef cattle: I. Protein requirements for growth and maintenance



Revista da Sociedade Brasileira de Zootecnia 22(1): 110-120



This work was carried out in the Animal Science Department of the Universidade Federal de Vicosa to Study body fat and protein composition and protein requirements for weight gain of non-castrated bovines from three breed groups. Forty-eight animals were used, of which 16 were Nelore (NE), 16 F1 Nelore x Marchidiana (NM), and 16 F1 Nelore x Limousin (NL) with initial average weights of 252.0, 329.5 and 338.9 kg, respectively, and an average of 20 months. Four animals from each group were slaughtered at the beginning of the experiment to estimate empty body weight (EMB) and the initial concentration of fat and protein in the aniamls from each breed group. The remaining 12 animals of each group were maintained in individual pens and divided into three sub-groups which were assigned to slaughter at individual weights corresponding to 90, 100, and 110% of mature weight of the cows from the corresponding genetic group. The animals were fed a ration containing 50% concentrate, dry matter basis. Body fat and protein content were deetermined by chemical analysis of bone, muscle and adipose tissue in the rib joint (Hanskins and Howe, 1946) and by chemical analysis of blood, hide, digestive tract and other internal organs. The fat and protein contents of the body were estimated by regression of the logarithm of fat and protein content in the empty body as a function of the logarithm of the empty body weight (ARC, 1980). The net protein requirements for weight gain were obtained through derivation of the respective equations for prediction of body composition. The Graybil test revealed differences (P lt 0.01) among the genetic groups. The NE group had a greater (P lt 0.01) body fat content than the other groups. There was no difference (P gt 0.05) among groups in body protein content in the range of weights studied. The groups did not differ (P gt 0.05) inet protein requirement for weigh gain.

(PDF 0-2 workdays service: $29.90)

Accession: 009115138

Download citation: RISBibTeXText



Related references

Nutritional requirements of finishing beef cattle: II. Energy requirements for maintenance and weight gain. Revista da Sociedade Brasileira de Zootecnia 22(1): 122-132, 1993

Nutritional requirements of finishing beef cattle. Body composition and protein requirements for weight gain. Revista da Sociedade Brasileira de Zootecnia 22(1): 110-120, 1993

Nutrient requirements of growing and finishing beef cattle. Feedstuffs 7, 48 (38) 53-55, 1976

Formulating rations for growing and finishing beef Nutrient requirements of cattle. Extension bulletin E Cooperative Extension Service Michigan State University: 82 (1655rev), 1982

Nutritional requirements of finishing beef cattle. Energy requirement for maintenance and weight gain. Revista da Sociedade Brasileira de Zootecnia 22(1): 121-132, 1993

Nutritional requirements of finishing beef cattle. 4. Requirements for magnesium, sodium and potassium. Revista da Sociedade Brasileira de Zootecnia 22(1): 144-154, 1993

Nutritional requirements of finishing beef cattle. 3. Calcium and phosphorus requirements for weight gain. Revista da Sociedade Brasileira de Zootecnia 22(1): 133-143, 1993

Nutrient requirements of domestic animals. 4. Nutrient requirements of beef cattle. (Nat. Acad. Sci.-Nat. Res. Counc. Publ. No. 1137). Nutrient requirements of domestic animals. 4. Nutrient requirements of beef cattle, Washington, D.C., 55, 1970

Nutrient requirements of domestic animals. Number 4. Nutrient requirements of beef cattle. Nutrient requirements of domestic animals Number 4 Nutrient requirements of beef cattle (5th edition): vii + 56, 1976

Nutrient requirements of domestic animals number 4 nutrient requirements of beef cattle. Nutrient Requirements Of Domestic Animals Number 4 Nutrient Requirements Of Beef Cattle 55, 1970

Protein requirements of finishing beef cattle from start to finish. 1975

Nutrient requirements of domestic animals no 4 nutrient requirements of beef cattle. Nutrient Requirements Of Domestic Animals No 4 Nutrient Requirements Of Beef Cattle 56, 1976

Nutrient requirements of domestic animals. 4. Nutrient requirements of beef cattle. Nutrient requirements of domestic animals. 4. Nutrient requirements of beef cattle, Washington, D.C., Publ. 1137, 30, 1963

Nutrient requirements for Canadian Yorkshire swine. 5. A study of the lysine and protein requirements of finishing pigs weighing from 100 to 200 lb. Canad. J. Animal Sci, 45: 105-110, 1965