Abstract
We investigated whether the addition of either spinach or sweet-potato leaves to the diet of growing pigs, kept in small holdings in Central Vietnam, would improve growth performance. A control diet was formulated and mixed with each of the vegetables to a final concentration of 15% of the total dietary dry matter. The diets were fed to the pigs from 70 to 100 days of age on six different smallholder farms in Central Vietnam. There were three animals per treatment group per farm and biopsies of adipose tissue were analysed for their contents of α-linolenic, eicosapentaenoic and docosahexaenoic acids. The diets without and with vegetables contained on average 0.14 and 0.32 g α-linolenic acid per MJ metabolizable energy. The relative percentage of α-linolenic acid in adipose tissue was raised by the intake of the vegetables. Eicosapentaenoic acid was not detectable in adipose tissue and the level of docosahexaenoic acid was unchanged. There was a significant stimulatory impact of the intake of either spinach or sweet-potato leaves on growth performance of the growing pigs. It is suggested that an adipose tissue content of α-linolenic acid less than 1% of total fatty acids does not allow maximum growth in growing pigs.
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REFERENCES
AOAC, 1984. Offcial Methods of Analysis, 12th edn, (AOAC International, Washington, DC)
Folch, J., Lees, M. and Sloane-Stanley, G.H., 1957. A simple method for the isolation and purification of total lipids from animal tissues, Journal of Biological Chemistry, 226, 497–509
Fritsche, K.L., Huang, S.C. and Cassity, N.A., 1993. Enrichment of omega-3 fatty acids in suckling pigs by maternal dietary fish oil supplementation Journal of Animal Science, 71, 1841–1847
Metcalfe, L.D., Schmitz, A.A. and Pelka, J.R., 1966. Rapid preparation of fatty acid esters from lipids for gas chromatography analysis. Analytical Chemistry, 18, 514–516
National Research Council, 1998. Nutrient Requirements of Swine, (National Academy Press, Washington, DC)
Nguyen, L.Q., Everts, H., Duong, N., Tanh, P.V. and Beynen, A.C., 2003a. Growth performance of growing pigs kept on small-holder farms in Central Vietnam and fed diets containing either ruminant or fish meal (Submitted)
Nguyen, L.Q., Nuijens, M.C.G.A., Everts, H., Salden, N. and Beynen, A.C., 2003b. Mathematical relationships between the intake of n-6 and n-3 polyunsaturated fatty acids and their contents in adipose tissue of growing pigs. Meat Science, 65, 1399–1406
Nguyen, L.Q., Everts, H. and Beynen, A.C., 2004. Intake of essential fatty acids by growing-finishing pigs kept on small holdings in Central Vietnam. Tropical Animal Health and Production, (In press)
Wu, D. and Meydani, S.N., 1998. N-3 polyunsaturated fatty acids and immune function. Proceedings of the Nutrition Society, 57, 503–509.
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Nguyen, L., Everts, H., Hue, H. et al. Feeding of Spinach or Sweet-potato Leaves and Growth Performance of Growing Pigs Kept on Smallholder Farms in Central Vietnam. Tropical Animal Health and Production 36, 815–822 (2004). https://doi.org/10.1023/B:TROP.0000045958.84521.ab
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DOI: https://doi.org/10.1023/B:TROP.0000045958.84521.ab