Impact of Phytase and Cholecalciferol Supplementation on the True Digestibility of Phosphorus by Broiler Chickens Fed Some Agro-Based Byproducts | Chapter 11 | Advanced Research in Biological Science Vol. 9

This research is aimed to determine the effects of phytase and vitamin D3 supplementation in Cottonseed Meal (CM) and Rice Husk (RH)-based diets on true phosphorus digestibility (TPD) by broiler chickens (BC). Two studies were conducted with 576 one-day-old broiler chickens using regression analysis to determine the TPD in these diets and the response to phytase supplementation. Six semi-purified diets were formulated to contain 150g, 300g, and 450g each of CM/kg (experiment 1) and RH/kg (experiment 2) with phytase supplied at 0 and 1000 units/kg. A total of 288 BC in each study were allotted to the six diets with six replicates of eight birds in a randomized complete block design. In another study (experiment 3), 125 BC were allotted to five treatments comprising a Positive Control (PC, D1) without CM and four CM-based semi-purified diets (31.5%): Negative Control (NC, D2), NC+vitaminD3 (D3), NC+phytase (D4) and NC+phytase+vitamin D3 (T5) replicated five times. Similarly, 125 BC were randomly allotted to five treatments comprising a PC (D1) without RH and four RH-based semi-purified diets (30%): NC (D2), NC+ vitaminD3 (D3), NC+phytase (D4) and NC+phytase+vitaminD3 (D5). All birds were fed the experimental diets from day 21 to day 28 post-hatch. True phosphorus digestibility was 0.82 for CM and 0.75 for RH without phytase; and 0.95 for CM and 0.92 for RH with phytase. Phytase supplementation resulted in 13.27 and 17.94% increases in TPD; and 12.29 and 13.61% increases in TPR by birds fed the CM and RH diets, respectively. In experiment 3 (CM-based diet), ileal phosphorus significantly (P<0.05) reduced (0.08) with a corresponding increase in the percentage apparent phosphorus digestibility (90. 64) in D3. There was a significant (P<0.05) reduction in excreta phosphorus and a corresponding increase in the percentage of apparent phosphorus retention in the D5. In the RH-based diets, Digestible phosphorus was significantly (P<0.05) improved in D3. Excreta phosphorus was significantly reduced in the supplemented diets. Phytase and Vit D3 supplementation of CM and RH-based diets increased TPD, Digestible P and improved TPR and true ileal phosphorus digestibility in broiler chickens.

Author(s) Details:

Ilaboya Ibinabo Imuetinyan,
Department of Animal Science and Animal Technology, Benson Idahosa University, Benin City, Edo State, Nigeria.

Imouokhome James Ien-Oa,
Department of Animal Science and Animal Technology, Benson Idahosa University, Benin City, Edo State, Nigeria.

Unity Daniel Osayande,
Department of Agricultural Technology, Edo State College of Agricultural and Natural Resources, Iguoriakhi, Edo State, Nigeria.

Ibiezugbe Jacob Ejodamen,
Regulatory Affairs Department, Nigerian Institution of Animal Science, Abuja. Nigeria.

Eustace Ayemere Iyayi,
Nigerian Institute of Animal Science, Abuja. Nigeria.

Please see the link here: https://stm.bookpi.org/ARBS-V9/article/view/13809