Responses in growth performance and nutrient digestibility to a multi-protease supplementation in amino acid-deficient broiler diets

Influence of barley inclusion method and protease supplementation on growth performance, nutrient utilisation, and gastrointestinal tract development in broiler starters

“…The lower the ingredient quality or dietary nutrient density, the greater the magnitude of improvements with added enzymes ( Ravindran, 2013 ). The responses of protease in improving the growth performance of broilers (d 35) when added to protein and AA-deficient diets reported by Cho et al. (2020) support this postulation.…”

Comparative effects of proteases on performance, carcass traits and gut structure of broilers fed diets reduced in protein and amino acids

“…Maximizing the utilization of CP and AA at the lowest possible feed cost can offer nutritionists a window of opportunity to improve overall broiler profitability. Reformulating diets to lower cost and reduced CP and AA levels with the use of proteases has proven to be an effective strategy in this respect [36][37][38][39][40]. Growth performance improvements following the application of proteases to broiler diets have been previously…”

Multiprotease improves amino acid release in vitro, energy, and nutrient utilization in broilers fed diets varying in crude protein levels

“…Positive effects of serine proteases on growth performance parameters have been reported ( Cowieson et al, 2017 ; Rehman et al, 2018 ; Park et al, 2020 ; Saleh et al, 2020 ; Jabbar et al, 2021 ), while others did not show a response over the same chicken growing period from 7 to 24 d of age ( Ding et al, 2016 , Law et al, 2018 ; Cardinal et al, 2019 ). Proteases have been tested to improve the performance of chickens fed low-CP diets ( Ding et al, 2016 ; Cho et al, 2020 ; Jabbar et al, 2021 ). Ding et al (2016) reported that a reduced CP diet (starter diets 21, 20, and 19% CP) negatively affected performance.…”

“…Enzymes, including mono-component protease, have been proposed to improve the utilization of reduced CP diets with considerable synthetic AA supplementation ( Vieira et al, 2016 ; Chrystal et al, 2020 ; Jabbar et al, 2021 ). Broilers fed a protein-deficient diet (lower CP and AA) supplemented with multiprotease were found to improve growth performance with increased ileal AA and CP digestibility ( Cho et al 2020 ).…”