BONEMEAL AND ROCK PHOSPHATE AS SOURCES OF CALCIUM AND PHOSPHORUS FOR WEANER AND GROWER PIGS.
BONEMEAL AND ROCK PHOSPHATE AS SOURCES OF CALCIUM AND PHOSPHORUS FOR WEANER AND GROWER PIGS.
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Date
1990-06
Authors
FABIAN, GYIZAKA KAANKUKA
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Abstract
Three experiments involving a total of 78 Large White
X Hampshire cross-bred pigs were conducted to compare
bonemeal and rock phosphate as sources of calcium and
phosphorus for weaner and grower pigs.
In the first two trials, 48 weaner and 24 grower
pigs with average initial weights of 11.85kg and 35.64kg
respectively were used in 2 x 3 factorial randomized-block
design experiments with two sources of calcium and phosphorus
(bonemeal and rock phosphate) and three levels of calcium
and phosphorus (low, medium and high). There were no
significant (P>.05) differences in performance and serum
calcium concentration between pigs fed bonemeal and rock
phosphate supplemented diets in both trials. increasing
dietary calcium and phosphorus levels did not affect
performance in the weaner trial but significantly (P<.05)
depressed total weight gain and average daily gain in the
grower trial. Serum calcium concentration increased
significantly (P<.05) at 18 days in the weaner trial but
not in the grower phase while serum inorganic phosphorus
concentration increased significantly (p<.05) when dietary
calcium and phosphorus increased from low to high in the
weaner trial but only from low to medium in the grower
trial. Metacarpal bones were significantly (P<.05) longer
in pigs fed bonemeal diets while those fed rock phosphate
diets had higher values for metacarpal and metatarsal
bone diameter. increasing dietary calcium and phosphorus
levels significantly (P<.05) reduced metacarpal and
metatarsal bone lengths while the medium dietary level
of calcium and phosphorus resulted in significantly (P<.05)
higher values for ash, calcium and phosphorus content of
metacarpals.
The third trial was a nutrient balance trial involving
six litter-mate weaner barrows averaging 10.52kg used in
a randomized-block design to determine the effect of source
and dietary levels of calcium and phosphorus on the
digestibility and retention of feed nutrients. Source
of phosphorus had no effect on nutrient digestibility and
retention. Apparent digestibility of dry matter decreased
with increasing dietary calcium and phosphorus levels.
Pigs fed the high level of calcium and phosphorus had
significantly (P<.05) lower dry matter digestibility and
retention than those fed the low and medium levels
Description
A THESIS
Submitted to Postgraduate School, Ahmadu Bello University,
Zaria in partial fulfillment of requirements for the degree of
MASTER OF SCIENCE (ANIMAL SCIENCE).
DEPARTMENT OF ANIMAL SCIENCE
FACULTY OF AGRICULTURE
AHMADU BELLO UNIVERSITY, ZARIA.
JUNE, 1990.
Keywords
BONEMEAL,, ROCK PHOSPHATE,, SOURCES,, CALCIUM,, PHOSPHORUS,, WEANER,, GROWER PIGS