Performance of Broiler Chicks Fed Mash or Pelleted Diets Containing Corn-With-Cobs Meal With or Without Enzyme Supplementation.

Abstract

The objective of present study was to investigate the effect of feeding diets containing different levels (0, 15, 30 or 45 %) of corn-with-cobs (CWC) meal in two forms (mash or pellets) with or without adding exogenous enzyme preparation (Sicozyme) on the broiler growth performance, carcass traits, blood constituents, and nutrient digestibility. Five hundred seventy-six Hubbard broiler chicks were randomly divided into 16 equal experimental groups; each contained 3 equal replications. The chicks were kept in brooding and growing batteries during the starter and finisher periods, 0-3 and 3-7 weeks of age. Sixteen starter and finisher experimental diets were formulated and used. Each experimental group was given its respective diet and all birds were managed similarly and had free access to feed and water. The results obtained can be summarized in the following: Apart from the effect of diet form (DF) or enzyme addition (EA), feeding CWC-diets had no adverse effect on live body weight (LBW) or body weight gain (BWG) of broilers during the entire experimental period. When the dietary CWC level reached 45% feed intake (FI) of broilers was significantly increased while feed conversion (FC) was negatively affected compared with their control counterparts. Birds fed pellets exhibited significantly better LBW and BWG than those of birds fed the mash diets, while FI and FC were not affected, regardless of the effect of dietary CWC level or EA. Similarly, LBW and BWG of broilers were positively affected due to dietary EA as compared to those of birds fed the un-supplemented diets, irrespective of the effect of DF or dietary CWC level. Increasing dietary CWC level to 30 or 45% adversely affected digestibilities dry matter, organic matter and crude protein and rate of nitrogen retention. Birds fed the pelleted diets had better digestibilities for crude protein and ether extract and nitrogen retention compared with those fed the mash diets. Dietary EA led to an increase in the rate of nitrogen retention. Carcass traits of broilers were not significantly affected by dietary CWC level with the exception of significant reductions in dressing-out and abdominal fat percentages and an increase in relative weight of gizzard for birds fed the 45% CWC-diets compared with the controls. Dietary EA and DF had no effect on carcass traits, except that gizzard percent slightly reduced due to feeding pellets as compared to feeding the mash diets. There were significant reductions in serum levels of triglycerides, total cholesterol, and LDL-cholesterol for broilers fed the CWC-containing diets, particularly having the 45%level. However, blood parameters were not affected by EA or DF, with the exception of a significant decrease in triglycerides level in broilers fed pellets as compared to those fed the mash diets. Economic efficiency of broiler production was not affected by including CWC up to 30% in their diets; pelleting of diets and enzyme addition might have a beneficial effect. It could be concluded that corn-with-cobs meal can be inclu...

Influence of Different Time and Frequency of Multienzyme Application on the Efficiency of Broiler Chicken Rearing and Some Selected Metabolic Indicators

“…In general, with few exceptions, our results showed that there were no significant effects from the application time and/or application frequency on the blood serum biochemistry and hematology. In other studies, dietary enzyme addition did not affect serum protein concentrations (alpha 1-, alpha 2-, beta and gamma-globulins and albumin) and albumin/globulin ratios [42][43][44][45].…”

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

“…In agreement with the present results, addition of phytase to the pelleted feed for broilers improved the rates of growth and FCR during 1-20 days of age (Attia et al 2003;Attia et al 2012) and also during the period from 21 to 37 days of age (El-Ghamry et al 2005). However, multi-enzymes addition to pelleted diets for chickens containing rice bran and whole corn improved the growth performance and feed utilisation, showing an additive effect of enzymes cocktail over pelleting, however overlapping in the mode of action may exist between enzymes and pelleting (El-Serwy et al 2008, 2009. In addition, multienzymes or phytase addition to broiler diets containing different levels of OC up to 10% did not affect growth rates (Sateri et al 2017;Al-Harthi 2017).…”

The Responses of Growth Performance, Digestibility and Blood Biochemistry of Chickens to the Dose and Administration Method of Enzymes

“…Conversely to our results, Azarfar (2013) and Alagawany et al (2017) who pointed out that the control diet resulted in significantly higher concentrations of total cholesterol and its fractions than the other diets which contained 1 g enzyme /kg. All blood serum parameters were not affected by enzyme supplementation (El-Serwy et al, 2012 andFathey, 2012).…”

“…The usage of enzymes in the feeding of broilers has enhances feed digestibility, minimizing the antinutritional effects and promoting the productivity indexes (Attia et al, 2003 andHooge et al, 2010), the digestibility rates (Fafiolu et al, 2015 andZeng et al, 2015).And improved growth performance (Attia et al, 2014a;Fafiolu et al, 2015and Williams et al, 2014and 2018, survival rate (Abdel-Hafeez et al, 2016), reduce the pollutant potential of excreta (Costa et al, 2008), improved the economic efficiency (Attia et al, 2008 andEl-Serwy et al, 2012) and gut ecology (Cowieson, 2010 andAttia et al, 2014b). However, the effect of multienzyme counted on dietary composition and enzyme type (Attia;2003;Abudabos, 2012 andAttia et al, 2014a).…”