CALCIUM AND PHOSPHORUS REQUIREfENT OF GROWING YANKASA LAMBS IN THE SAVANNA REGION OF NIGERIA.
CALCIUM AND PHOSPHORUS REQUIREfENT OF GROWING YANKASA LAMBS IN THE SAVANNA REGION OF NIGERIA.
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Date
1980-11
Authors
OKOYE, FRANK CHUKWUDOZIE
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Abstract
Two experiments were conducted to determine the calcium and
phosphorus requirement of growing Yankasa lambs in the Savannah
region of Nigeria, The first experiment which was designed to
study the calcium requirement of growing lambs in the region
involved two studies with varying dietary calcium levels:0.28%,
0.42%, 0.56%, 0.70%, 0.86%, 0.99% and 1.15%. Rations
were formulated to be adequate and similar in protein, energy
and vitamin D. The criteria of adequacy employed included growth
performance, mineral retention, serum calcium and phosphorus
levels and bone development. The results indicated that the
provi#ion of dietary calcium at the rate of 305 nig/kg body weight per
day was adequate for growth.
The second experiment was conducted to determine the optimum
levels of calcium and phosphorus for growing lambs in this region.
Three levels of dietary calcium and three levels of dietary
phosphorus were used in a 3 X 3 factorial arrangement. The nine
rations were formulated to be isocaloric and isonitrogenous
and vitamin D was provided at the rate of 5.6 I.U per kg body
weight per day. The same criteria of adequacy were used as in
first experiment. The optimum level of dietary calcium for
growing lambs was found to be 295 mg/kg body weight per day
while the optimum level of dietary phosphorus was found to be276 mg/kg body weight per day.
Endogenous values for calcium and phosphorus obtained by
regressing the faecal and urinary outputs of the elements on the
intake were found to be 5.5mg/kg body weight per day for calcium
in experiment 1, 9.1mg per kg body weight per day for calcium in
experiment 2 and 32.3 mg/kg bodyweight per day for phosphorus in
experiment 2. The merit of expressing mineral requirement on net
basis is discussed and recommended.
Description
A THESIS Submitted to Ahmadu Bello University, Zaria in partial
fulfilment for the degree
MASTER OP SCIENCE (IN AGRICULTURE)
Department of Animal Science.
Keywords
CALCIUM,, PHOSPHORUS,, GROWING,, YANKASA,, LAMBS,, SAVANNA,, REGION,, NIGERIA.