Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-20T14:39:58.076Z Has data issue: false hasContentIssue false
  • English
  • Français

The effects of different fats and their inclusion level in diets for growing rabbits

Published online by Cambridge University Press:  02 September 2010

G. Santomá ,
J. C. de Blas ,
R. M. Carabaño  and
M. J. Fraga
G. Santomá
Affiliation:
Department of Animal Nutrition, Escuela Tecnica Superior de Ingenieros Agrónomos Universidad Poletécnica, 28040 Madrid, Spain
J. C. de Blas
Affiliation:
Department of Animal Nutrition, Escuela Tecnica Superior de Ingenieros Agrónomos Universidad Poletécnica, 28040 Madrid, Spain
R. M. Carabaño
Affiliation:
Department of Animal Nutrition, Escuela Tecnica Superior de Ingenieros Agrónomos Universidad Poletécnica, 28040 Madrid, Spain
M. J. Fraga
Affiliation:
Department of Animal Nutrition, Escuela Tecnica Superior de Ingenieros Agrónomos Universidad Poletécnica, 28040 Madrid, Spain
Get access

Abstract

Three hundred and sixty male and female Californian ♂ × New Zealand White ♀ growing rabbits were used to study the influence of nine types of fat at 30 or 60 g/kg diet on growth and apparent digestibility. The fats used were: beef tallow (T), pork lard (L), sunflower oil (SO), two by-products from the oil-refining industry, sunflower oleins (O) and soya-bean lecithin (S), and 2: 1 (w/w) mixtures of T + S, L + S, O + S and T + O. All diets, including a diet without added fat, were formulated to a 190 g/kg acid-detergent fibre (ADF) level and to a 100 kJ digestible energy per g digestible protein ratio.

As O level in the diet increased, growth was significantly impaired (P < 0·001) but the other fats had no significant effect on this variable (P > 0·05). A maximum oleins concentration in the diet of 10 g/kg is suggested. Excluding diets with more than 10 g oleins per kg, a significant improvement in food conversion ratio was recorded for diets containing 60 g added fat per kg (P < 0·05). This improvement was related not only to a higher gross energy concentration of added-fat diets but also to a significantly (P < 0·001) higher energy digestibility (0·653 v. 0·602 for 60 g/kg added-fat diets and control diet respectively). Fat addition both at 60 and 30 g/kg also improved significantly (P < 0·001) dry matter, organic matter, crude protein and ether extract (EED) digestibilities. As a result, the use of ether extract in addition to ADF for estimating the energy value of diets including added fat, is proposed.

An increase in the degree of unsaturation of dietary ether extract increased significantly EED (P < 0·001), but did not affect other variables studied.

Type
Papers
Information
Animal Production , Volume 45 , Issue 2 , October 1987 , pp. 291 - 300
Copyright
Copyright © British Society of Animal Science 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Arrington, L. R., Platt, J. K. and Franke, D. E. 1974. Fat utilization by rabbits. Journal of Animal Science 38: 76–80.CrossRefGoogle ScholarPubMed
Association of Official Analytical Chemists. 1975. Official Methods of Analysis of the Association of Official Analytical Chemists. 12th ed. Association of Official Analytical Chemists, Washington, DC.Google Scholar
Battaglini, M. and Grandi, A. 1984. [Estimate of nutritive value of mixed feeds for rabbits.] Proceedings of III Rabbit World Congress, Rome, pp. 252–264.Google Scholar
Becker, M. 1961. Análisis y Valoración de Piensos y Forrages. Acribia, Zaragoza.Google Scholar
Blas, J. C. De, Fraga, M. J., Rodriguez, J. M. and Méndez, J. 1984b. The nutritive value of feeds for growing fattening rabbits. 2. Protein evaluation. Journal of Applied Rabbit Research 7: 97–100.Google Scholar
Blas, J. C. De, Pérez, E., Fraga, M. J., Rodriguez, J. M. and Gálvez, J. F. 1981. Effect of diet on feed intake and growth of rabbits from weaning to slaughter at different ages and weights. Journal of Animal Science 52: 1225–1232.CrossRefGoogle Scholar
Blas, J. C. De, Rodriguez, J. M., Santoma, G. and Fraga, M. J. 1984a. The nutritive value of feeds for growing fattening rabbits. 1. Energy evaluation. Journal of Applied Rabbit Research 7: 72–74.Google Scholar
Blas, J. C. De, Santomá, G., Carabano, R. and Fraga, M. J. 1986. Fiber and starch levels in fattening rabbit diets. Journal of Animal Science 63: 1897–1904.Google Scholar
Carregal, R. D. and Eiko, A. 1983. [Effect of the addition of vegetable oil to diets for growing rabbits.] Revista Latino-Americana de Cunicultura 1: 17–20.Google Scholar
Chiericato, G. M. and Lanari, D. 1972. [Influence of fat supplement to th e feed, and of sex, in th e production of rabbit meat.] Rivista di Zootechnia 45: 137–149.Google Scholar
Håkansson, J. 1974. Factors affecting the digestibility of fats and fatty acids in chicks and hens. Swedish Journal of Agricultural Research 4: 33–47.Google Scholar
Harvey, W. R. 1972. Least-squares and maximum likelihood general purpose program. Ohio State University, Columbus. (Mimeograph).Google Scholar
Lebas, F. 1975. [Influence of the dietary energy content on the growth performance of the rabbit.] Annales de Zootechnie 24: 281–288.CrossRefGoogle Scholar
Lebas, F. 1979. Nutrition et alimentation du lapin: les besoins. Cuniculture 6: 159–160, 207–208.Google Scholar
Mateos, G. G. and Sell, J. L. 1981. Nature of th e extrametabolic effect of supplemental fat used in semipurified diets for laying hens. Poultry Science 60: 1925–1930.CrossRefGoogle Scholar
Mateos, G. G., Sell, J. L. and Eastwood, J. A. 1982. Rate of food passage (transit time) as influenced by level of supplemental fat. Poultry Science 61: 94–100.CrossRefGoogle ScholarPubMed
Meirelles, C. F. and Zinsly, C. F. 1982. [Addition of oil to rations with different amounts of protein for growing rabbits.] Boletim de Industria Animal 36: 101–118.Google Scholar
Ministerio de Agricultura, Pesca Y Alimentación. 1974. Métodos Ofïciales de Análisis Aceites y Grasas. Madrid.Google Scholar
Ministerio de Agricultura, Pesca Y Alimentación. 1977. Métodos Ofïciales de Análisis Aceites y Grasas. Madrid.Google Scholar
Ministerio De Agricultura, Pesca Y Alimentación. 1979. Métodos Ofïciales de Andlisis Aceites y Grasas. Madrid.Google Scholar
Parigi-Bini, R., Chiericato, G. M. and Lanari, D. 1974. [Fat supplemented feeds for growing rabbits.] Rivista di Zootecnia e Veterinaria 3: 193–202.Google Scholar
Pedron, O., Bigoli, A., Corino, C. and Dei L'orto, V. 1981. [Effect of diets rich in fat on the production of meat rabbits.] Coniglkoltura 17: 51–55.Google Scholar
Pote, L. M., Cheeke, P. R. and Patton, N. M. 1980. Utilization of diets high in alfalfa meal by weanling rabbits. Journal of Applied Rabbit Research 3: 5–10.Google Scholar
Robertson, J. F. and Van Soest, P. J. 1977. Dietary fibre estimation in concentrate feedstuffs. Journal of Animal Science 45: Suppl. 1, pp. 254 (Abstr.).Google Scholar
Santomá, G., Pérez, P. and Carabano, R. 1986. Nota sobre la utilizatión de oleinas desorizadas en dietas de cebo de conejos. Anales del I.N.I.A. Serie Ganadera In press.Google Scholar
Teleki, M. and Darwish, A. M. 1970. The effect of dietary fat on energy and protein utilization of rabbits. Acta Agronomica, Academiae Scientiarum Hungaricae 18: 93–98.Google Scholar
Thacker, E. J. 1956. The dietary fat level in the nutrition of the rabbit. Journal of Nutrition 58: 243–249.CrossRefGoogle ScholarPubMed
Van Soest, P. J. 1963. Use of detergents in the analysis of fibrous feeds. II. A rapid method for the determination of fiber and lignin. Journal of Association of Analytical Chemists 46: 829–835.Google Scholar
Waller, R. A. and Duncan, D. B. 1969. A Bayes rule for the symetric multiple comparisons problem. Journal of American Statistical Association 65: 1484.Google Scholar
Winer, B. J. 1971. Statistical Principles in Experimental Design. 2nd ed. McGraw-Hill, New York.Google Scholar