الفهرس 
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Abstract
Five indigenous castrated kids having nearly the same age (10 - 12
M) and weight (15.5 kg), were used in four experiments (eight trials) to
examme the way in which goats adapt their Ca & P metabolism in
response to changes in the dietary intake of both elements ranging from
grossly deficient (LCaLP, 0.10%, Ca & 0.16% P) to more than adequate
(HCaHP, 0.82% Ca & 0.53% P). Besides, serum concentration ofCa, P &
Mg were determined. In addition, food intake, body gain and digestibility
of various nutrients of the experimental diets were also investigated.
The animals were fed a balanced control ration for 3 weeks, then
were divided into 2 groups (A & B of 3/A and 2IB). Individual metabolism
cages were designed to separate the urine and faeces as they were voided.
The kids were fed the experimental diets for 4 weeks as preliminary
period followed by a 8-day collection period during which faeces and urine
of the animals were separately collected and prepared for chemical
analyses, besides, determination of Ca, P & Mg content. Along the
experiments, blood samples were collected at the beginning of the
adaptation period and then at weekly intervals for the determination of
serum Ca, P & Mg concentrations. For each trial, the animals were
weighed every fortnight and the body gain was recorded and the average
daily food intake during the collection period was also recorded. Eight test
diets varying in their Ca & P levels were formulated to contain the
recommended amounts of DE, CP, Mg & Vitamin D, acceding the tables
of NRC (1981) for goats. The common salt, mineral mixture and vitamin.