Effects of Adding Phytase from <i>Aspergillus niger</i> to a Low Phosphorus Diet on Growth Performance, Tibia Characteristics, Phosphorus Excretion, and Meat Quality of Broilers 35 days after hatching

Abstract

This study was designed to determine the effect of phytase extracted from Aspergillus niger (Natuphos ® E) on growth performance, bone mineralization, phosphorous excretion, and meat quality parameters in broilers fed available phosphorous (aP)-deficient diet. In total, 810 one-day-old Indian River broilers were randomly allotted into one of three dietary treatments, with six replicates per treatment. The three dietary treatments were 1) control group (CON: basal diet with sufficient aP), 2) low phytase (LPY: available phosphorus-deficient diet supplemented with 0.01% phytase), and 3) high phytase (HPY: available phosphorus-deficient diet supplemented with 0.02% phytase). Average daily gain and, feed intake, and feed conversion ratio were measured for 35 days. Excreta were collected from each pen on day 35. One broiler from each cage was euthanized to collect visceral organs and tibia samples. Broiler chickens fed LPY and HPY showed improved (P＜0.05) growth performance compared to broilers fed CON on day 35. The tibia length of HPY-fed broilers was more than those of broilers fed other diets on day 35 (P＜0.05). However, tibia calcium and phosphorous contents in LPY-fed broilers was higher (P＜0.05) than in CON and HPYfed broilers. Tibia length and calcium and phosphorous content showed a positive correlation (P＜0.05) with the weight gain of broilers on day 35. Phosphorous level in the excreta of LPY-and HPY-fed broilers was lesser than those of CON broilers on day 35 (P＜0.05). Furthermore, HPY-fed broilers showed lower (P＜0.05) phosphorous content in the excreta than LPY-fed broilers. LPY-and HPY-fed broilers showed higher (P＜0.05) liver weight than the CON broilers. In conclusion, broilers fed aP-deficient diet supplemented with phytase from Aspergillus excreted less phosphorus, which enhanced growth performance and tibia development from time of hatching to day 35 posthatching.

The Growth Performance, Nutrient Digestibility, Gut Bacteria and Bone Strength of Broilers Offered Alternative, Sustainable Diets Varying in Nutrient Specification and Phytase Dose

“…Contrary to previous work [63] and what may be expecteda reduction in P content of the diet (NC) resulted in greater P excretion than birds offered diets with a higher P content, despite reduced feed intake. This increase in P excretion may be a result of the slight reduction in P digestibility of NC birds.…”

Effect of phytase supplementation on performance, fecal excretion, and compost characteristics in broilers fed diets deficient in phosphorus and calcium

“…We confirmed that the CP and P excretions of broilers fed the NC1500 diet 22% and 32.6% lower, respectively than those fed the PC diet ( Table 4 ). These results are supported by Srikanthithansan et al [ 29 ] who observed that less P was excreted by broilers fed a low phosphorus diet (3.0% avP/kg) supplemented with 500 to 1000 FTU/kg phytase than those fed a normal P diet (4.5% avP/kg). Walk and Olukosi [ 30 ] also reported that broilers fed a phytase-supplemented diet (2,000 or 4,000 FTU/kg) showed a higher CP digestibility, together with less CP excreted.…”

Algae-based antioxidant containing selenium yeast (Economase®) enhanced the growth performance, oxidative stability, and meat quality of broiler chickens

“…Ultimate pH, color, drip loss, cook loss, water holding capacity (WHC), oxidative stability (thiobarbituric acid reactive substances [TBARS]), and tenderness (shear force value) were measured as previously described [ 20 ].…”