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Title: The lysine response of the turkey
Author: Nixey, Clifford
ISNI:       0000 0001 3447 6689
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 1991
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After reviewing the literature, it was found that there was a paucity of information on the subject. Examination of quantitative models of nutritional responses of a turkey did not clarify the situation. Analysing suitable published data by the Reading flock response model (Fisher, Jennings and Moms, 1973), which derives the two constants a and b in the equation:- Lysine requirement = a x body-weight gain + b x body-weight showed some agreement in a values among different experiments, although b values varied greatly. Using the diet dilution technique, fifteen experiments were performed to generate lysine response data. These were analysed by the Reading model. Eleven experiments covered a range of ages from 4 days to 20 weeks, two experiments were concerned with the genetic potential for gain and two experiments examined the influence of the previous plane of nutrition. For males the mean value (+SEM) for a was 21.4+2.0 g lysine/kg gain. There was no indication of the value reducing until at least 120 days of age. The a value for females was similar to that of males until 84 days in a fast-growing strain, decreasing thereafter. In a slow-growing strain,^this divergence occurred at an earlier age. The b values averaged 6.0 x 10 for males and 7.0 x 10 for females. It was shown that compensatory growth is possible, but that the extent to which it takes place will be dependent on the degree of previous growth depression. Optimum ratios of lysine:energy (g lysine per MJ ME) decreased with age. It is recommended that these are used in conjunction with tables of lysine input and body-weight output produced from the experimental data. These tables could also provide the basis of a method of computer simulation of turkey nutritional responses.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: SF Animal culture