Impact of phytase on improving the utilisation of pelleted broiler diets containing olive by-products

Abstract

A feeding trial was run to assess the effect of olive cake (OC) in pelleted diets at 0, 10 and 15% with or without 500 FTU/kg diet of a bacterial E. coli phytase (BECP) for broiler chickens during early growth phase period (7-28 days of age). The experimental set up including six treatments as 3 OC levels  2 supplementations (no enzyme and 500 FTU of BECP). Each treatment was replicated eight times, having five male chickens each. Phytase supplementation significantly increased growth rate and improved production index regardless of the level of OC. Inclusion of OC in broiler diets at 10 and 15% did not significantly affect growth rate, European production index and economic efficiency irrespective of BECP supplementation. In addition, phytase supplementation significantly increased growth rate, European production index and economic efficiency, irrespective of OC level. Plasma cholesterol and triglycerides were decreased considerably due to phytase supplementation to 10 and 15% OC diets. In addition, phytase supplementation significantly increased plasma inorganic phosphorus of broiler fed different levels of OC, and economic efficiency of broilers fed 10% OC, and decreased plasma triglycerides and cholesterol of 10 and 15% OC diets. In conclusion, broiler chickens during early growth stage can be fed pelleted diet contained up to 15% OC with or with BECP supplementation, without adverse effects on growth performance, carcase characteristics, plasma lipid profiles, while phytase supplementation to 10% OC diets yield the highest return over cost and economic efficiency. HIGHLIGHTS This investigation highlights the use of phytase to improve oil cake utilisation in pelleted broiler diets; the essential findings are: Inclusion of olive cake in broiler diets at 10 and 15% did not significantly affect growth rate, European production index and economic efficiency irrespective of phytase supplementation. Phytase supplementation significantly improved, growth, European production index, and economic efficiency, regardless of OC level. Phytase supplementation also markedly increased plasma inorganic phosphorus of broiler fed different levels of OC, and economic efficiency of broilers fed 10% OC, regardless of olive cake level. Plasma cholesterol and triglycerides were significantly decreased due to phytase supplementation to 10 and 15% olive cake diets. Phytase supplementation to 10% olive cake diets yields the highest return over cost and economic efficiency ARTICLE HISTORY

Effects of Saccharomyces cerevisiae and phytase co-fermentation of wheat bran on growth, antioxidation, immunity and intestinal morphology in broilers

“…Nevertheless, as the outbreak of COVID-19 worldwide, the lack of labors affects the produces of corn and soybean and causes feed deficiency. Therefore, it is important to find alternative sources of carbohydrates while safeguarding the health of animals [1][2][3][4][5]. Because fiber is considered to be an anti-nutritional factor, low-fiber diets were typically used when feeding non-ruminant livestock animals in the past [6].…”

“…Cowiesonet al [10] and Hamdi et al [11] indicated that the addition of phytase to feeds can increase the digestion of phosphorus, minerals, and amino acids of broilers and increase broilers' bone strength. In addition, the research group of Attia et al and Al-Harthi et al reported that phytase could improve performance of broiler chickens regardless of phosphorus contents in broiler diet [1][2][3][4][5].…”

Energetic Values and Inclusion Levels of the Dry Residue of Cassava in Broiler Diet

“…The high fiber content and soluble NSPs in the diet can increase the digestion viscosity when in contact with water, forming gums, which increase the size of the bolus and consequently cause gastric distension, which in turn causes a feeling of satiety in the birds, reducing FI (Oliveira et al, 2012;Al-Harthi et al, 2020). The chemical composition of DRC shows that the cassava byproduct has a high starch content and a high fiber concentration, as also observed by Abrahão et al (2006) and Khempaka et al (2009), justifying the reduction in performance.…”

Evaluation of various levels of sweet almond meal as a source of protein on the production variables and immune response of broiler chickens

“…The international prices of this feedstuff have increased the costs of poultry production, and therefore, reduced marketing margins. Additionally, due to the high amount of wastes from the agricultural sector and food industry, proper management of these resources and identifying the nutritional value, makes it possible to produce cheap and suitable ingredients for poultry which are not competitive with human food (Al‐Harthi et al., 2019, 2020). Agroindustry wastes from tomato, olive, date and sunflower processing have valuable nutritional characteristics, and could be included in poultry rations to facilitate reducing feeding costs (Seidavi et al., 2018).…”

“…By‐products of tomato and olive processing can be supplemented in the diet of broilers up to 10% without detrimental effects on production, while improving the biochemical blood profile of chickens. It was shown olive cake is a valuable ingredient for inclusion in broilers' pelleted diet up to 15% during 7–28 days of age with phytase supplementation (Al‐Harthi et al., 2020). Also Al‐Harthi et al (2019) showed that Prosopis pods meal could be used as an alternative feedstuff for poultry production, specially, in tropical and sub‐tropical regions where feed resources are generally limited.…”