VALUATION OF THE NUTRITIONAL MATRIX BY PHYTASE AND SOY GUM IN THE DIET FORMULATION FOR BROILER CHICKENS

Luiz Gustavo Nascimento Rostichelli,Rosemary Pereira De Pedro Souza,Matheus Sousa De Paula Carlis,Rosemeire Da Silva Filardi,Antonio Carlos De Laurentiz

doi:10.1590/1983-21252020v33n425rc

Luiz Gustavo Nascimento Rostichelli, Rosemary Pereira De Pedro Souza + Show 3 more

Open Access

https://doi.org/10.1590/1983-21252020v33n425rc

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Abstract

ABSTRACT The study was carried out with the objective of evaluating whether the valorisation of the nutritional matrix by the addition of the enzyme phytase and soy gum, in isolation or in association in the formulation of broiler chicken diets compromises the performance in the phase of 7 to 42 days of age and can be economically viable. Seven hundred 7-day-old male Cobb 500 broiler chicks were distributed in a completely randomised design consisting of seven treatments and five replications of 20 birds. The treatments consisted of a standard diet and six other diets whose matrix values of phytase and gum were valued, either alone or in combination, in the formulation of the diets. The individual valuation of the nutritional matrix of the phytase and soy gum in the formulation of feed for broiler chickens did not compromise the zootechnical performance of the chickens; however, only the valuation with phytase proved economically viable, since the inclusion of the gum and its valuation did not contribute to a reduction in the production cost or gross margin compared to a standard diet.

Highlights

IntroductionThe main challenge of nutritionists is to promote the reduction of production costs, coupled with the mitigation of waste pollutants and the promotion of health and animal welfare
The advancements in poultry production, mainly in the production of broiler chickens, demonstrates the importance of research in the search for alternatives to reduce feed costs, since these represent around 71.56% of production costs (EMBRAPA, 2020).the main challenge of nutritionists is to promote the reduction of production costs, coupled with the mitigation of waste pollutants and the promotion of health and animal welfare
The reduction in Ca and aP occurred only in treatments in which phytase was considered in the formulation and removed from the feed, with an average reduction of 32.38% for the Ca level and 19.18% for the aP, with identical values for the RN-P and RN-PG treatments, since for the soy gum there was a valorisation only in the energy level

Summary

Introduction

The main challenge of nutritionists is to promote the reduction of production costs, coupled with the mitigation of waste pollutants and the promotion of health and animal welfare. In this way, many studies aim to evaluate ways of optimising the use of raw materials, and co-products and by-products from industry. The unavailability of almost 2/3 of the phosphorus contained in ingredients of plant origin is because it is bonded to inositol, forming phytic acid or inositol hexaphosphate, which can form nutritionally important organic mineral complexes and represents one of the main anti-nutritional factors that affect nutrient availability for monogastric animals (COWIESON; WILCOCK; BEDFORD, 2011). An alternative to increase the availability of phosphorus and other complexed nutrients in the phytic acid molecule and the release of energy is the inclusion of exogenous enzymes in the feed, such as microbial phytases (MANOBHAVAN et al, 2015; WU et al, 2015)

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