EurekaMag.com logo
+ Translate

Maintenance requirement for valine and efficiency of its use above maintenance for accretion of whole body valine and protein in young chicks


, : Maintenance requirement for valine and efficiency of its use above maintenance for accretion of whole body valine and protein in young chicks. Journal of Nutrition 126(7): 1844-1851

Experiments were conducted with chicks during the period 10-20 d posthatching to assess valine accretion and protein accretion as a function of incremental valine intakes between 5 and 95% of its ideal level (requirement for maximal growth). Chemically defined crystalline amino acid diets were fed, and amino acids other than valine were maintained at minimized excess levels as valine was increased. With dietary valine concentrations representing 5, 10, 40, 55, 70 and 95% of the ideal level, weight gain (r2 = 0.98), protein accretion (r2 = 0.98) and valine accretion (r2 = 0.99) increased linearly (P < 0.01) as a function of valine intake. Slope of the valine accretion curve was 0.73 +/- 0.02, and there was no indication of decreased valine utilization as valine intake increased to 95% of its required level for maximal growth. Using the linear regression equation, i.e., valine accretion (Y) regressed on valine intake (X), the maintenance valine requirement (X at Y zero) was 18.4 mg/d or 48.8 mg/d per kg body weight3/4. Whole body valine was 4.72 g/100 g whole body protein accreted and was constant at all levels of valine intake. At zero protein accretion, however, valine accretion was negative (-3.8 mg/d). Thus, the valine requirement for zero valine accretion (48.8 mg/d per kg(3/4) was higher than the valine requirement for zero protein accretion (32.4 mg/d per kg3/4). In a subsequent experiment, also involving whole body valine and protein accretion, valine doses of 40, 55 and 70% of ideal were compared using amino acid-balanced diets (amino acids other than valine at 55, 70 and 85% of ideal levels, respectively) or imbalanced diets (amino acids other than valine at a constant 100% of their ideal levels). Straight-line (P < 0.01) valine and protein accretion responses occurred, but slope of the response curves (accretion vs. valine intake) was lower in the imbalanced series than in the balanced series. The results of these studies suggest a constant utilization above maintenance of absorbed valine over a wide range of valine intake.

(PDF 0-2 workdays service)

Accession: 002889048

PMID: 8683346

Submit PDF Full Text: Here


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Edwards, H.M.; Baker, D.H.; Fernandez, S.R.; Parsons, C.M., 1997: Maintenance threonine requirement and efficiency of its use for accretion of whole-body threonine and protein in young chicks. Broiler chicks were fed on chemically-defined crystalline amino acid diets containing graded levels of L-threonine (Thr) during the period 10-20 d post-hatching. Doses of Thr represented 5, 10, 15, 40, 55, 70 and 95% of its ideal level for maximal...

Edwards, H.I.i; Fernandez, S.; Baker, D., 1999: Maintenance lysine requirement and efficiency of using lysine for accretion of whole-body lysine and protein in young chicks. Two bioassays were conducted to determine the maintenance requirement and efficiency of utilization of dietary Lys in young chicks. New Hampshire x Columbian males were used in Assay 1 and Avian x Avian males were used in Assay 2. In each assay, c...

Darman, K.Hi.H.; Kebreab, E.; Lopez, S.; France, J., 2009: Application of the law of diminishing returns to estimate maintenance requirement for amino acids and their efficiency of utilization for accretion in young chicks. The Journal of Agricultural Science 147(4): 383

Fisher, H., 1960: Amino acid requirement for maintenance in the adult rooster IP The requirements for leucine, isoleucine, valine and threonlne, with reference also to the utilization of the D-isomers of valine, the ronine and isoleucine. The maintenance requirements for leucine, isoleucine, valine and threonine were determined in the adult rooster not depleted of his protein reserves. Using a 6-day feeding period, nitrogen balance was used as a criterion of adequacy. The ability o...

Edwards, H.I.i; Baker, D., 1999: Maintenance sulfur amino acid requirements of young chicks and efficiency of their use for accretion of whole-body sulfur amino acids and protein. Peterson x Hubbard male chicks were used in two bioassays conducted to determine the maintenance requirement and efficiency of utilization of dietary Met and Cys in young chicks. In each assay, chicks were given free access for 10 d to crystalline...

Leveille, G.A.; Fisher, H., 1960: Amino acid requirement for maintenance in the adult rooster. 3. The requirements for leucine, isoleucine, valine and threonine, with reference also to the utilization of the D-isomers of valine, threonine and isoleucine. For part 2 see Abst. 5055, Vol. 30. 3. The method was that used before. The maintenance requirements, in mg. per kg. bodyweight per day, for adult cockerels were L-leucine 124, L-isoleucine 72, L-threonine 74 and L- or DL-valine 61. Corresponding...

Leveille, G.A.; Fisher, H., 1960: Amino acid requirement for maintenance in the adult rooster. III. The requirements for leucine, isoleucine, valine and threonine, with reference also to the utilization of the D-isomers of valine, threonine and isoleucine. Journal of Nutrition 70: 135-140

Rollin, X.; Wauters, J-Baptiste.; Bodin, N.Lie.; Larondelle, Y.; Ooghe, W.; Wathelet, B.; Abboudi, T., 2006: Maintenance threonine requirement and efficiency of its use for accretion of whole-body threonine and protein in Atlantic salmon (Salmo salar L.) fry. Eighteen groups of seventy Atlantic salmon (Salmo salar L.) fry (initial mean body weight 0-8 (SD 001) g) were fed on semi-purified diets containing graded levels of L-threonine (Thr) in 15 litres aquaria at a temperature of 14-5 [plus or minus] 1...

Anonymous, 2007: Histidine maintenance requirement and the efficiency of its utilisation for protein accretion in pigs

Edwards, H.M.I.i; Fernandez, S.R.; Parsons, C.M.; Baker, D.H., 1996: Maintenance lysine and threonine requirements of young chicks and efficiency of their utilization above maintenance. Poultry Science 75(SUPPL 1): 86