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The Bioavailability of Phosphorous from Bone Meal and Triple Super Phosphate and Its Effects on Indigenous Growing Cattle

M. M. Rahman
Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Z. H. Khandaker
Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. B. M. Khaleduzzaman
Animal Nutrition Section, Department of Livestock Services, Krishi Khamar Sarak, Farmgate, Dhaka-1215

Abstract/ Executive Summary:

The bioavailability of phosphorous, and blood serum and rumen liquor P level was studied in indigenous growing cattle by feeding bone meal and Triple Super Phosphate (TSP) with control diet. Nine indigenous growing cattle (live weight of 164 ± 21 kg) were randomly assigned in a Completely Randomized Design (CRD) to three dietary treatments, consisted of a basal diet (T0) of 0.16% P and experimental diets supplemented with bone meal (T₁) and triple super phosphate (T₂) to provide P level of 0.44%. All diets were formulated to be iso-nitrogenous and iso-caloric. Three cannulated animals were used for rumen liquor P level study by feeding three diets. Apparent absorption and balance of P were significantly (P<0.01) higher in T₁ and T₂ diets than that of diet To, but true absorption did not differ significantly (P>0.05). Bioavailability of P of control diet (37.41%), bone meal (81.45%) and triple super phosphate (80.49%) were significantly differed (P<0.01). Rumen liquor and blood serum P level differed significantly (P<0.01). Supplementation of bone meal and triple super phosphate results in high blood serum P (P>0.05) with no difference between bone meal and triple super phosphate. The results suggested that the bioavailability of P from bone meal and TSP was high and dietary supplementation of P with bone meal and TSP improved P retention and blood serum P level.

Keywords: Phosphorous, Bone meal, Triple super phosphate, Bioavailability, Growing cattle

Location: Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh

Start Date: 00-00-2008

End Date: 00-00-2008

Program Area: Animal Health and Management

Commodity: Feed

Objectives:

1. To investigate the bioavailability of P from bone meal and triple super phosphate and its effect on P level in blood and rumen liquor of indigenous growing cattle.

Methodology:

Nine indigenous growing cattle of 2.5 years having initial live weight of 164 ± 21 kg were used in this experiment for a period of 60 days. The animals were randomly divided into three groups of three animals each in a completely randomized design (CRD). Three experimental diets were control (T0) consisted of 69.08% rice straw, 12.65% dhal grass, 13.25% broken wheat, 4.02% soybean meal, 0.60% urea and 0.40% common salt and contained 0.16% P. To elevate the P level to 0.44%, bone meal and triple super phosphate was used in diet T₁ and T₂ respectively. Three ruminally cannulated indigenous cattle were also used to study the P contents in the rumen liquor for a period of 15 days of which the rumen liquor collection period was 5 days. Daily feed intake was recorded. At the middle of the experiment a metabolism trial was conducted for a period of 10 days of which last seven days was collection period. Blood sample (10 ml) of experimental animals were collected in the morning before offering feed and water by punching the jagular vein at 15 days interval. Approximately 250 ml of rumen liquor sample of individual cannulated animal was collected for period of three days. The rumen liquor samples were strained through 4 layers of muslin cloth, centrifuged and stored in the freeze. Phosphorous contents of feed ingredients, faeces, urine, rumen liquor and blood sample were determined.

Source of Information: Bang. J. Anim. Sci. 2008, 37(2) : 58 - 65; ISSN 0003-3588

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The bioavailability of P from bone meal (81.45%) and TSP (80.49%) were significantly (P<0.01) higher than that of control (37.41%) diet. However, the value for bone meal and TSP did not differ significantly (P>0.05). From these results it is indicated that more P is available from bone meal and TSP in the animal body for metabolism. It is reported that biological availability of P from monocalcium phosphate, dicalcium phosphate, defluorinated phosphate, steam bone meal were 95-98, 93-95, 88-91 and 80-82% respectively. Similarly, bone meal, ammonium phosphate and super phosphate have been reported to have an equal P availability to dicalcium phosphate.

Knowledge Management: Journal