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Heat-stable phytase enzyme in on growth performance in broiler chickens

Bio-Efficacy of a heat-stable phytase enzyme in pelleted feed on growth performance in broiler chickens

Published: November 5, 2008
By: Dr.Munawar Ali, General Manager - Islamabad Farms (Pakistan)
An experiment was conducted at Research & Development Centre, Islamabad Feed Mills, Rawat, Pakistan, from July 26 to September 01, 2007.

The trial used 4,356 day old broiler chicks and was conducted to 35 days of age to determine bio-efficacy of a phytase enzyme (Phyzyme XP 10000 TPT, Danisco) on the growth performance of broiler chicks.

Eight treatment diets were prepared as follows:

     1. Without DCP&MCP and no phytase supplementation
     2. Without DCP&MCP and 50 g/tonne phytase supplementation
     3. With 25% DCP&MCP and no phytase supplementation
     4. With 25% DCP&MCP and 50 g/tonne phytase supplementation
     5. With 50% DCP&MCP and no phytase supplementation
     6. With 50% DCP&MCP and 50 g/tonne phytase supplementation
     7. With reduced DCP&MCP and 50 g/tonne phytase supplementation and with use of matrix values
     8. Positive Control diet


All the ingredients used and diets prepared were analyzed for total phosphorus (P). Total P in the control feed was 0.75 and 0.72% for starter and finisher diets respectively and lower in other diets with the reduction in inclusion level of DCP&MCP.

Total P in starter and finisher diets without DCP&MCP supplementation was 0:55 and 0.51%, respectively.

The phytase was added in premix and feed processed in a commercial pelleting mill closely monitored at 90-95 °C conditioning temperature.

There were 36 replicate floor pens with 121 chicks per pen and assigned to eight dietary treatments with 4 or 5 replicates per treatment, at random. Broiler strain used was Hubbard. Daily feed intake, weekly body weight per pen and mortality were recorded and feed: gain ratio was calculated.

Commercial broiler feed served as positive control diet. In other diets supplementation of DCP and MCP was reduced to zero, 25% and 50 % of the amounts in the positive control with and without phytase during starter and finisher phases.

Composition of the starter feeds used from 1-28 days is shown in table 1. Finisher diets similar in composition were used for the period 29-35 days (not shown).


Results

Results for weight gain, feed intake, mortality and feed:gain ratio are summarized in table 2. In all cases, the addition of phytase improved growth performance by broiler chicks. For the first 6 treatments, addition of the phytase improved weight gains, feed intake and feed:gain.

With 50% replacement of the DCP&MCP, phytase addition of 500 FTU/kg feed gave weight gain, feed intake and feed:gain equal to the positive control feed.

Use of matrix values for Calcium and available P, as suggested by the phytase manufacturer, also gave performance equal to the positive control treatment.


Table 1. Composition of starter feeds

Bio-Efficacy of a heat-stable phytase enzyme in pelleted feed on growth performance in broiler chickens - Image 1



Table 2. Effects of treatments on broiler performance (1-35 days)

Bio-Efficacy of a heat-stable phytase enzyme in pelleted feed on growth performance in broiler chickens - Image 2
1 Matrix values were …
2 50 g/tonne feed (500 FTU/kg feed)
3 Corrected for mortality



Conclusions

From the performance results of this trial, this particular phytase appears to be stable under the pelleting conditions used.

The phytase used gave improved weight gains, feed intake and feed:gain when added to P reduced diets.

Two treatments in particular would appear to be worth considering for commercial use. This is replacement of 50% of the inorganic P in the diet, or by reducing Calcium and Phosphorus according to the recommendations of the manufacturer.



About the Author:

Dr. Munawar Ali is General Manager of Islamabad Farms, Pakistan. He is responsible for broiler breeder management and poultry feed formulation and has 29 years practical experience.
Related topics
Authors:
Munawar Ali
Islamabad Group
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Dr. Anjum
Dr. Anjum
28 de mayo de 2010

Dear Dr Munawar Ali, Thanks for your great work for the betterment of poultry feed utilization.
Regards! Dr. Anjum
Leads Pharma

Munawar Ali
Islamabad Group
24 de febrero de 2009
Dear Joe, Thanks for appreciating my article. This trial was done on our company's R&D. We have already done many other trials on enzymes. I will see how I can help you. How I can contact you? Waiting for reply. Dr. Munawar Ali
Joe Hart
Joe Hart
21 de febrero de 2009

This is excellent work. We are currently looking for a PhD level poultry nutritionist to support this and similar work in North America. Any advice on suitable background / experience level needed or even contacts would be appreciated.

Joe Hart Life Sciences Consultant

Dr Khalid M Mahrose
Dr Khalid M Mahrose
30 de diciembre de 2008

Dear Dr,
Thank you for your article and efforts.
Please would you send me a copy of the complete paper to my email. I have a student in master degrees who studies use of phytase in poultry rations.
Thank you in advance.

Dr. Sekhar Basak
Dr. Sekhar Basak
18 de diciembre de 2008
Dear Dr. Munawar, Congratulations for showcasing a very interesting trial report on benefits of using phytase under high pelleting temperature conditions. May I request you to kindly send me the complete report on my email? Please also let me know the brand of phytase used for the trials.
M.s.anjum
M.s.anjum
11 de diciembre de 2008
Dear Dr Munawar, Assalam_O_Alakum Happy to go through your article. I am also involved in the enzyme research at Newcastle University. Would you attach me full version of your article and findings? Your findings will be of much benefit and prove some rays of light for me as well. Dr Muhammad Safdar Anjum, Professor Veterinary and Animal Sciences RAWALAKOT
Liang Song
Guandong VTR Biotech
4 de diciembre de 2008

Good job. Phytase is really an enviormental-friendly product for poultry industry.

Arshaq Ramzee
13 de noviembre de 2008
Great work, Dr. Munawar. Your research would, indeed, help poultry industry of Pakistan to reduce cost of feed manufacturing along with reduce the impact of phosphorus in the environment.
Liaquat Ali Malik
UM Enterprises
12 de noviembre de 2008

Dr Munawar,
Great work and it will be helpful to reduce the cost of feed production which is needed very much in the current situation.

Liaquat Malik

Rao Zulqurnain
Rao Zulqurnain
9 de noviembre de 2008
Dr. Munawar, Great article. Plz send me the complete trial details, when the results of this trial will apply on commercial feed.
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