Efficacy of a novel protease produced by fermentation in Bacillus Licheniformis on growth performance of broiler chickens fed a wheat-soybean meal-based diet

F Khattak, Guenter Pappenberger, Jose- Otavio Berti-Sorbara, Adam Smith, Aaron J. Cowieson, Murtala Umar Faruk

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Abstract

This study investigated the efficacy of a novel microbial serine sfericaseendopeptidase expressed in Bacillus licheniformis, in broilers fed wheat and soybean mealbased diets under simulated commercial conditions.

A total of 576, male, day-old Ross 308 broilers were used in this 35-day study in a randomizedcomplete block design. The study contained 2 treatments, each containing 24 replicates. Thecontrol cohort was fed a basal diet meeting Ross 308 nutrient requirements. This diet wasthen supplemented with 30,000 NFP/kg feed protease and represented the secondtreatment. The experimental diets were fed as crumbs during starter (0-14d) and pelletsduring grower (14-28d) and finisher (28-35d) phases. Feed and water were supplied adlibitum. Average daily feed intakes (ADFI) and average body weights (ABW) were recordedper pen at 0, 14, 28 and 35-d and average daily weight gain (ADWG) and mortality-adjustedfeed conversion ratios (FCRc) were calculated. Data were analyzed by one-way ANOVA withblocks using Genstat 19.

The in-feed recovery of protease in starter, grower and finisher feeds were 27,740, 30,460and 29,520 NFP/kg, respectively. The ABW of birds fed diets supplemented with proteasewere +17%, +13%, and +11.9% higher (P<0.05) during starter, grower, and finisher phases,respectively. The ADFI was also higher (P<0.05) during starter (+2.5%), grower (+5.6%), andfinisher phase (+7.1%) in birds fed diets containing protease compared with the control. This improvement in ABW and ADFI in protease fed birds was reflected in significantly lower FCRvalues during starter (-12%) and grower (-5.2%) phase only. Over the entire trial duration (0-35d), birds receiving the diet that was supplemented with protease had +6.3% and+3.3% higher (P<0.05) ADWG and ADFI, respectively, and -5.1% lower (P<0.05) FCRc valuescompared to un-supplemented control birds. The overall mortality remained low (3.2%).

It can be concluded that this novel sfericase protease is effective in improving broiler growthperformance and can be used in animal production industry to optimize broiler performance.
Original languageEnglish
Publication statusFirst published - 11 Jul 2022
EventPSA Annual meeting, San Antonio, Texas, USA (July 11 – 14 2022) - Texas, San Antonio, United States
Duration: 11 Jul 202214 Jul 2022

Conference

ConferencePSA Annual meeting, San Antonio, Texas, USA (July 11 – 14 2022)
Country/TerritoryUnited States
CitySan Antonio
Period11/07/2214/07/22

Bibliographical note

PSA Annual meeting, San Antonio, Texas, USA (July 11 – 14 2022)

Keywords

  • Protease
  • Bacillus licheniformis
  • Growth performance
  • feed additive
  • Broiler

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