The effect of dietary phytase on broiler performance and digestive, bone, and blood biochemistry characteristics

Abstract

Antagonism, digestible amino acid, egg components, Haugh units. ABSTRACTThe dietary inclusion of phytase increases nutrient and energy bioavailability for broilers. The effect of phytase increases nutrients and energy bioavailability for either the objective of this experiment was to evaluate the influence of nutrient and energy reduction in diets supplemented with phytase on the performance, gastrointestinal pH, organ and bone composition, and blood biochemistry of broilers between eight and 21 days of age. In the study, 1.120 male Cobb 500® broilers, with 161±1g average weight, were used. At eight days of age, birds were distributed according to a completely randomized experimental design with seven treatments in a 3x2+1 factorial arrangement with eight replicates of 20 broiler each. Treatments corresponded to reduction of calcium (Ca) and phosphorus (P), amino acids and energy, or reduction of Ca, P, amino acids and energy; supplementation or not of phytase; and a positive control treatment. Broiler fed the diet with reduced Ca and P levels and phytase supplementation presented the best performance of all groups. The diet with reduced amino acid and energy levels and phytase addition reduced gizzard and proventriculus pH. Dietary Ca and P reduction increased relative liver and heart weights, as well as albumin blood levels. The bones of broilers fed phytase-supplemented diets presented higher ash content.

Phytate-phosphorus and phytase contents on the relative weight of organs, intestinal morphometry and performance of broilers

“…Study conducted by WANG et al (2013) did not observe such fact. However, SOUSA et al (2015), upon evaluating diets with reduced nutritional levels, in the presence or absence of phytase, observed an increase in the relative weight of the heart, but with the absence of phytase. Authors noted that cardiac hypertrophy may be caused by hypophosphatemia due to the low supply of phosphorus.…”

“…Phytase has an effect on performance, retention and availability of nutrients, reducing the variability of energy from feed stuffs, neutralizing the anti-nutritional effects of phytate; thus, increasing the accuracy of feed formulation (SOUSA et al, 2015).…”

“…The effects and benefits of phytase on the performance of broilers have been shown in different studies; however, phytase is basically used to reduce the anti-nutritional effects of phytate (RAVINDRAN et al, 2008;SELLE et al, 2009;OLUKOSI &FRU-NJI, 2014;SOUSA et al, 2015). When such fact occurs, there is an improvement of intestinal integrity and consequently greater absorption of nutrients and better performance of the animal (SMULIKOWSKA et al, 2010).…”

Effect of AgpP-P phytase supplementation on productivity, nutrient availability, veterinary-sanitary assessment of meat and serum biochemical parameters of broiler chickens

“…Shirley and Edward (2003) found that supplementing phytase from 0 to 12000 U/kg significantly increased body weight gain from 287 to 515 g/chick [35]. De Sousa et al (2015) reported that broilers fed on the phytase supplemented diet showed 4.40, 11.04 and 7.14% (P < 0.05) improvement in feed intake, weight gain and feed conversion ratio, respectively [36]. Moreover, Lim et al (2001) in a study demonstrated that inclusion of phytase in feed increased weight gain and reduced mortality [37].…”

Микробиота Кишечника И Продуктивные Каче-Ства Бройлеров При Использовании Фитазы Для По-Вышения Усвояемости Фосфора И Питательных Веществ Из Комбикормов

“…Как следствие, благодаря фитазе улучшается переваримость протеина и использование аминокислот корма, снижаются эндогенные потери аминокислот (33). Также сообщается об улучшении минерализации костяка цыплят под влиянием фитаз (34)(35)(36), что отмечалось и в наших опытах.…”