Availability of lysine in vegetable protein concentrates as determined by the slope-ratio assay with growing pigs and rats and by chemical techniques | British Journal of Nutrition | Cambridge Core (original) (raw)

Abstract

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1. The availability of lysine in nine vegetable-protein concentrates was assessed using the slope-ratio assay for growing pigs and rats. Diets were equalized for crude fibre using solka floc to minimize any possible effects of variation in fibre content on availability estimates.

2. The availability of lysine in the nine proteins for pigs, using food conversion efficiency (FCE) on a carcass basis as the criterion of response were (proportion of total): cottonseed meal 0.39, lupin (Lupinus angustifolius) seed meal no. 10.37, no. 20.65, no. 30.54, no. 40.54, field peas (Pisum sativum) 0.93, peanut (groundnut) meal 0.57, soya-bean meal no. 10.98, no. 2 0.89.

3. Estimates of available lysine for rats as assessed by the slope-ratio assay using FCE on a carcass basis were in close agreement with the pig estimates for cottonseed meal (0.35) and soya-bean meal no. 1(0.91) and no. 2(0.89), higher for lupin-seed meals (range 0.70–0.94 with a mean of 0.81) and peanut meal (0.76) and lower for field peas (0.76).

4. The differences in available lysine were not detected by the chemical Silcock available-lysine test (Roach et al. 1967) or by the direct 1-fluoro-2,4-dinitrobenzene procedure (Carpenter, 1960).

References

Batterham, E. S., Murison, R. D. & Lewis, C. E. (1979). British Journal of Nutrition 41, 383–391.CrossRefGoogle Scholar

Batterham, E. S., Murison, R. D. & Lowe, R. F. (1981). British Journal of Nutrition 45, 401–410.CrossRefGoogle Scholar

Carpenter, K. J. (1973). Nutrition Abstracts & Reviews 43, 423–451.Google Scholar

Finney, D. J. (1964). Statistical Method in Biological Assay, 2nd ed. London: Griffin.Google Scholar

Hove, E. L., King, S. & Hill, G. D. (1978). New Zealand Journal of Agricultural Research 21, 457–462.CrossRefGoogle Scholar

Hudson, B. J. F. (1979). Qualitas Plantarum-Plant Foods for Human Nutrition 29, 245–251.CrossRefGoogle Scholar

King, R. H. & Taverner, M. R. (1975). Animal Production 21, 275–284.Google Scholar

National Research Council (1972). Nutrient Requirements of Laboratory Animals, 2nd ed. Washington, DC: National Academy of Sciences.Google Scholar

Porter, J. W. G., Westgarth, D. R. & Williams, A. P. (1968). British Journal of Nutrition 22, 437–450.CrossRefGoogle Scholar

Roach, A. G., Sanderson, P. & Williams., D. R. (1967). Journal of the Science of Food and Agriculture 18, 274–278.CrossRefGoogle Scholar

Romer, T. R. (1975). Journal of the Association of Official Analytical Chemists 58, 500–506.Google Scholar

Van Soest, P. J. (1963). Journal of the Association of Official Agricultural Chemists 46, 829–835.Google Scholar

Van Soest, P. J. & Wine, R. H. (1967). Journal of the Association of Official Analytical Chemists 50, 50–55.Google Scholar

Williams, A. P., Hewitt, D., Cockburn, J. E., Harris, D. A., Moore, R. A. & Davies, M. G. (1980). Journal of the Science of Food and Agriculture 31, 474–480.CrossRefGoogle Scholar