Zobrazeno 1 - 9
of 9
pro vyhledávání: '"N. C. Tyler"'
Publikováno v:
Poultry Science, Vol 100, Iss 9, Pp 101284-(2021)
Poultry Science
Poultry Science
This experiment investigated the effect of excess crude protein and/or calcium on male broiler breeder fertility. Forty-eight broiler breeder males, from a group of 60 that consistently produced a semen sample were allocated to one of 4 dietary treat
Publikováno v:
South African Journal of Animal Science; Vol 48, No 6 (2018)
South African Journal of Animal Science, Volume: 48, Issue: 6, Pages: 1066-1072, Published: 2018
South African Journal of Animal Science, Volume: 48, Issue: 6, Pages: 1066-1072, Published: 2018
This experiment compared fertility of male broiler breeders with different crude protein (CP) intakes from diets containing 9.7%, 11.7% and 13% CP from 27 to 60 weeks of age (in two phases) and in a different group of birds from 52 to 60 weeks of age
Autor:
N. C. Tyler, M. Ciacciariello
Publikováno v:
Journal of Applied Poultry Research. 22:238-244
SUMMARY The CP and amino acid requirements for broiler breeder hens have historically been determined by assessing the response of these birds in terms of egg production. However, based on increasing evidence on the effects of maternal nutrient intak
Autor:
N. C. Tyler, H.A. Bekker
Publikováno v:
South African Journal of Animal Science; Vol 42, No 3 (2012); 304-309
South African Journal of Animal Science, Volume: 42, Issue: 3, Pages: 304-309, Published: 2012
South African Journal of Animal Science, Volume: 42, Issue: 3, Pages: 304-309, Published: 2012
Reports on the influence of dietary crude protein on male broiler breeder fertility are not consistent, and therefore an experiment was conducted to determine the effect of three isoenergetic diets containing 10.5%, 12.6% and 15% crude protein, respe
Autor:
R. M. Gous, N. C. Tyler
Publikováno v:
South African Journal of Animal Science; Vol 39, No 3 (2009)
South African Journal of Animal Science, Volume: 39, Issue: 3, Pages: 169-175, Published: 2009
South African Journal of Animal Science, Volume: 39, Issue: 3, Pages: 169-175, Published: 2009
Male broiler breeders were photostimulated at different ages (56, 77, 98, 119, 147 and 161 d) during the period of growth prior to achieving sexual maturity to observe their response to photoperiod stimulation. Birds were sampled at regular intervals
Publikováno v:
Journal of Applied Poultry Research. 23:791
Publikováno v:
American Journal of Public Health. 67:621-625
Four cohorts of urban women who delivered a child before reaching age 18 were followed for periods ranging from 6 to 12 years to determine use of abortion and sterilization. The two more recent cohorts had been served by comprehensive service program
Publikováno v:
American journal of public health. 65(4)
Publikováno v:
Obstetrical & Gynecological Survey. 26:512