2021
DOI: 10.3390/ani11092499
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Impact of Microbial Protease Enzyme and Dietary Crude Protein Levels on Growth and Nutrients Digestibility in Broilers over 15–28 Days

Abstract: In this trial, a 3 × 2 factorial design with different dietary crude protein levels (CP, 17, 19 and 21%) and two levels of exogenous protease (0 and 30,000 IU/kg) was used. A total of 540 two-week old broilers (Ross-308) was randomly allocated to experimental diets over 15–28 days of age. The interaction between dietary protein levels and enzyme supplementation showed that body weight gain was significantly (p < 0.05) higher in birds fed CP-19 (1114.7 g) and CP-21 (1108.8 g) with enzymes supplementation. Fe… Show more

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Cited by 29 publications
(20 citation statements)
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“…The banning of antibiotics as growth promoters, which has triggered research into alternative to antibiotics, such as probiotics [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ], prebiotics [ 11 , 12 , 13 , 14 ], enzymes [ 15 , 16 , 17 , 18 ], organic acids [ 19 , 20 ], herbs [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] and other compounds [ 37 , 38 ], has been reported in poultry production ( Figure 1 ). Researchers are developing phytogenics for usage in chickens with many advantages, such as increased feed efficiency, improved immunological status, and improved gastrointestinal health, in addition to others [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ].…”
Section: Introductionmentioning
confidence: 99%
“…The banning of antibiotics as growth promoters, which has triggered research into alternative to antibiotics, such as probiotics [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ], prebiotics [ 11 , 12 , 13 , 14 ], enzymes [ 15 , 16 , 17 , 18 ], organic acids [ 19 , 20 ], herbs [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] and other compounds [ 37 , 38 ], has been reported in poultry production ( Figure 1 ). Researchers are developing phytogenics for usage in chickens with many advantages, such as increased feed efficiency, improved immunological status, and improved gastrointestinal health, in addition to others [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ].…”
Section: Introductionmentioning
confidence: 99%
“…2 ProAct360 ® , DSM Nutritional Products, Switzerland; 50 g/ton corn diluted premixes had 0, 17 or 50 of the protease corresponding to 0, 10,000 and 30,000 New Feed Protease (NFP) units. Vieira et al 10.3389/fanim.2022.1040051 effects (Kaczmarek et al, 2014;Yuan et al, 2017;Walk et al, 2019) to significant improvements in growth performance of broilers (Freitas et al, 2011;Lee et al, 2018;Jabbar et al, 2021;McCafferty et al, 2022). Synergy between proteases with other in feed supplemental enzymes, such as phytases, xylanases and amylases have also been reported (Cowieson and Adeola, 2005;Amerah et al, 2017;Cowieson et al, 2019).…”
Section: Discussionmentioning
confidence: 99%
“…Exogenous enzymes increase the growth of birds through their ability not only to reduce the adverse effects of anti-nutritional factors (non-starch polysaccharide) but also to decrease cell membrane integrity, changes the gut microflora which consequently improves utilization of protein solubility and energy digestibility (Olukosi et al, 2015;Singh et al, 2017). Several commercially produced enzyme products composed of pure single digestive enzymes (protease, amylase, and lipase) have been used technically to improve nutrient digestibility and growth by augmenting the insufficient quantities of enzymes eRBCA-2022-1673 eRBCA-2022-1673 produced by the animal (Cowieson et al, 2019;Jabbar et al, 2021a). Although, numerous studies have indicated that cocktails of these enzymes deliver more significant improvements in inherent digestibility, such as apparent metabolizable energy (AME), amino acids (AA) digestibility, nutrient availability, and to a lesser extent, reduced nutrient excretion, their result in corn soybean meal (SBM)-based diet has been inconsistent (Romero et al, 2013;2014;Kaczmarek et al, 2014;Adebiyi & Olukosi, 2015).…”
Section: Introductionmentioning
confidence: 99%