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Phytex 500™ - University Trial “In Vivo”
National Autonomous University of Mexico - Augst 19th, 2004

Response to the use of Phytex 500™ in the formulation of layer diets.
Teaching and Research Center and Poultry Prodcution Extention, FMVZ UNAM .
Drs. Benjamin Fuente, Fco.Javier Tirado and Ernesto Avila


Materials and Methods

  • 240 Hy Line layers of age, 64 weeks old were distributed in four treatments , each with 5 replications per treatment and 12 layres per repetitions.
  • Free access of water and normal layer handling methods were used

Treatments:

  • T1) Control diet with 15% protein and low level of inorganic phosphorous (Pi) and Calcium (Ca), according to normal levels used in research
  • T2) Same control diet, reformulated (Less 0.1% of Pi y Ca).
  • T3) Same reformulated (T2) plus de addition of Phytex 500™ (100 g/ton).
  • T4) Commercial diet with 17.5% proteín and high level of Pi y Ca.

Trial

The trial period was 35 days.
The following parameters were measured:

  • Percentage egg production
  • Feed consumption
  • Feed conversion
  • Egg mass
  • Egg thickness
  • Cost / benefit ratio

The results are shown in the following slide.

Response in Egg Production to the Use of Phytex 500™ (Layers - Hy line)

P<0.01


Response in Egg Weight to the use of Phytex 500™ (Layers - Hy line)

P<0.01


Response in feed consumption to the use of Phytex 500™ (Layers- Hy line)

P<0.01


Response in feed conversion with the use of Phytex 500™ (Hence - Hy line)

P<0.01


Response in Egg Mass to the use of Phytex 500™ (Hence- Hy line)

P<0.01










Economic analysis.


Diet with Phytex 500™ represents 10.7% less, vs. Commercial diet


Comparative Egg Production Cost with the use of Phytex 500™





Total Phosphorous and Phytic P in Feed Ingredients




Conclusion

  • Phytex 500™ can substitute the addition of 0.1% phosphorous and calcium in layer diets without affecting egg production parameters.
  • The results obtained with the addition of Phytex 500 are in accordance with results reported by other researchers with other phytases.