Efficacy of New 6-Phytase from Buttiauxella spp. on Growth Performance and Nutrient Retention in Broiler Chickens Fed Corn Soybean Meal-based Diets

Asian-Australasian Journal of Animal Sciences
E KiarieC M Nyachoti

Abstract

A total of 420 day-old male Ross chicks were weighed at d 1 of life and assigned to test diets to assess the efficacy of a new Buttiauxella spp. phytase expressed in Trichoderma reesei. Diets were: positive control (PC) adequate in nutrients and negative control (NC) diet (40% and 17% less available phosphorous (P) and calcium (Ca), respectively) supplemented with 6 levels of phytase 0, 250, 500, 750, 1,000, and 2,000 phytase units (FTU)/kg of diet. All diets had titanium dioxide as digestibility marker and each diet was allocated to ten cages (6 birds/cage). Diets were fed for 3 wk to measure growth performance, apparent retention (AR) on d 17 to 21 and bone ash and ileal digestibility (AID) on d 22. Growth performance and nutrient utilization was lower (p<0.05) for NC vs PC birds. Phytase response in NC birds was linear (p<0.05) with 2,000 FTU showing the greatest improvement on body weight gain (20%), feed conversion (7.4%), tibia ash (18%), AR of Ca (38%), AR of P (51%) and apparent metabolizable energy corrected for nitrogen (5.1%) relative to NC. Furthermore, phytase at ≥750 FTU resulted in AID of total AA commensurate to that of PC fed birds and at ≥1,000 FTU improved (p<0.05) AR of P, dry matter, and N beyond that of th...Continue Reading

References

Mar 1, 1993·The Journal of Physiology·I M Glynn
Sep 3, 2008·The British Journal of Nutrition·Edward M OnyangoOlayiwola Adeola
Dec 1, 2000·Nutrition Research Reviews·P H SelleW L Bryden
Jan 16, 2009·The British Journal of Nutrition·Tofuko A WoyengoCharles M Nyachoti
Feb 9, 2012·Nutrition Research Reviews·Peter H SelleV Ravindran
May 4, 2013·Nutrition Research Reviews·Elijah KiarieCharles M Nyachoti

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Citations

Apr 22, 2017·Asian-Australasian Journal of Animal Sciences·Jong Hyuk KimDong Yong Kil
Aug 9, 2018·Applied Biochemistry and Biotechnology·Sirima Mingmongkolchai, Watanalai Panbangred
Sep 21, 2019·Journal of Agricultural and Food Chemistry·Johanna HirvonenPäivi Nurminen

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