Increasing zinc levels in phytase-supplemented diets improves the performance and nutrient utilization of broiler chickens

Abstract

Three hundred and thirty-six day-old Ross-308 male broiler chicks were used in a 35-day trial to investigate the effect of different concentrations of dietary Zn and phytase on broiler performance and energy utilization. Twelve day-old birds were used for the initial slaughter group to provide baseline body compositional data, while the remaining 324 birds were randomly distributed to six experimental diets. The treatments consisted of a 3 x 2 factorial arrangement with three levels of Zn (low, mid, and high; 30, 40, and 50 mg/kg, respectively) and two levels (0, 500 FTU/kg) of microbial phytase. Each dietary treatment was fed to 6 cages (9 birds/cage). Low Zn diet significantly decreased feed intake and body weight gain at days 1-24. Phytase supplementation improved body weight gain at d 24, irrespective of Zn level. The digestibility of P was improved in birds fed high-Zn diet with phytase supplementation, and the reverse was the case for Fe and Zn digestibility. High dietary Zn increased the Zn and Fe deposition in liver. The activity of AP, CaATPase and Mg-ATPase in the jejunum was high in the phytase supplemented mid-level Zn diet. Phytase supplemented to the mid and high level Zn diets significantly improved most energy utilization parameters. This result indicate that the Zn concentrations used in this study were not inhibitory to phytase activity and broiler performance. Therefore, it can be concluded that dietary zinc level in phytase-supplemented diets could be increased up to 50 mg/kg without any negative effect on phytase-mediated broiler response.

Comparative Effects of Inorganic and Three Forms of Organic Trace Minerals on Growth Performance, Carcass Traits, Immunity and Profitability of Broilers

“…Higher mortality was recorded in control group as they suffered more. This was because of the fact that ITM were less absorbed due to interactions with fiber, phytate, oxalate, silicates, or other minerals in the gastrointestinal tract [26], and, therefore, could not boost up immunity similar to OTM fed birds. It is well established that OTM are more bioavailable [6,7] and that they boost up immunity, and therefore improved the growth [27].…”

Nutritional significance of amino acids, vitamins and minerals as nutraceuticals in poultry production and health – a comprehensive review

“…Chelated forms of minerals are also being used for better results (Zhao et al 2016). Increased levels of minerals like zinc along with phytase in diets of poultry lead to better utilization of nutrients and enhance production performances (Akter et al 2017). Organic forms of minerals have numerous advantages over the inorganic forms, for example, proteinate and propionate organic trace minerals were found to be more effective in improving performance, immune response, and profitability in broiler birds than inorganic trace minerals (Khatun et al 2019).…”

Analyzing the impact of a combination of zinc oxide and phytase on the performance and alkaline phosphate activity in local chickens

“…Muszyńsk, et al [5] discovered that adding phytase (500 FTU/kg diet) and zinc oxide to the chicken feed could also result in increasing chicken body weight. It's worth noting that Akter et al [8] discovered that a diet containing phytase mixed with up to 50 mg/kg of zinc did not have any negative effects on chickens. In conclusion, it appears that the inclusion of up to 80 ppm of dietary zinc in phytaseadded diets (500 FTU/kg diet) does not adversely affect the IPB D1 Chicken response.…”

“…Phytate in seed-based feedstuff interferes with zinc absorption and lowers feed bioavailability [6]. Phytate is a compound that stores phosphorus in seeds and has a high affinity for binding with minerals such as calcium, iron, copper [7], and zinc [8]. In the digestive tract, phytate can bind with zinc, forming a compound called zinc-phytate, which reduces zinc absorption.…”