Growth Performance, Organ Weights and, Blood Parameters of Broilers Fed Diets Containing Graded Levels of Dietary Canola Meal and Supplemental Copper

Abstract

An experiment with 495 one-day-old male broiler chicks was conducted to investigate the effects of different dietary levels of canola meal (0, 10, 20%) and copper (0, 125, 250 mg/kg) on performance, carcass characteristics and some blood parameters. A completely randomized design with 3×3 factorial arrangement was used with 5 replicates from 1 to 42 of age. Feed intake was not significantly affected by treatments during 1 to 21 d, 21 to 42 d and throughout the study (P＞0.05). The body weight gain and feed conversion ratio was significantly impaired (P＜ 0.05) when 20% canola meal was added in the diets between 1 to 21 d. Addition of copper significantly improved body weight gain (P＜0.01) and feed conversion ratio (P＜0.05) of the birds during the 21 to 42 d and throughout the study. Carcass yield significantly (P＜0.05) increased due to addition of 250 mg/kg of copper. Proportion of thyroid glands (P＜0.0001), breast, liver, gizzard, pancreas and cecal significantly (P＜0.05) were affected by 20% canola meal. Plasma alkaline phosphatase and blood glutathione peroxidase activities were unaffected (P＞0.05) by dietary treatments. An added level of 20% canola meal was significantly reduced plasma zinc concentration. Levels of copper supplementation increased (P＜0.001) plasma copper and decreased (P＜0.05) plasma zinc levels. Plasma lipids altered by supplementation of copper, so that decreased plasma triglycerides (P＜0.01) and cholesterol (P＜ 0.05) concentrations and also increased high density lipoprotein (P＜0.05). In conclusion, the results of this study indicate that no effects of added canola meal up to 20% of the diet on the growth performance. In addition from this study it can conclude that supplementation with dietary copper had beneficial effects on growth performance and plasma biochemical characteristics of broiler chickens.

Evaluation of Different Levels of Canola Meal on Performance, Organ Weights, Hepatic Deiodinase Gene Expression and Thyroid Morphology in Broiler Chickens

“…This could be attributed to the lower CM glucosinolates and sinapine of our dietary CM that was not adequate to affect the FI. The current findings are in line with previous reports on CM usage in broiler chickens without any effect on FI (Payvastegan et al, 2013;Gopinger et al, 2014;Aljuobori et al, 2016;Zhang and Adeola, 2016 An increase in dietary level of CM reduced BWG of the chickens. This could be due to presence of antinutritional factors mainly fiber (12.9%) and glucosinolates (23.5 μmol/g) in the CM.…”

“…In line with our results, Newkirk and Classen (2002), Maroufyan and Kermnshahi (2006), Kermnshahi and Abasi pour (2006), Woyengo et al (2011) and Payvastegan et al (2013) reported the increased liver size of broilers due to dietary inclusion of CM. Accordingly, the AST and ALT activity determined in the current study also showed the significant rise as a result of increased dietary CM level.…”

“…Apart from these roles, approximately 7% of the dietary Arg were converted to proline, which are needed for the synthesis of connective tissue (Khajali and Wideman, 2010). Similarly, Mushtaq et al (2007) and Payvastegan et al (2013) also found significant differences in the breast weight of chickens that were fed by different levels of CM.…”

Effect of different levels of copper nanoparticles and copper sulphate on performance, metabolism and blood biochemical profiles in broiler chicken

“…Many studies (Jegede, Oduguwa, Bamgbose, Fanimo, & Nollet, ; Kumar et al., ; Payvastegan, Farhoomand, & Delfani, ; Samanta, Biswas, & Ghosh, ; Zahedi, Ghalehkandi, Ebrahimnezhad, & Emami, ) have shown a reduction in cholesterol levels after adding Cu to poultry diets, which is in agreement with our results. This can be explained, in that adding higher levels of Cu will regulate cholesterol biosynthesis indirectly by decreasing the reduced form of glutathione and increasing the oxidised form of glutathione (Bakalli, Pesti, Ragland, & Konjufca, ; Kim, Chao, & Allen, ).…”

“…The relative liver weight was affected by both forms of Cu and was significantly lower at higher concentrations of Cu in relation to the control group. The liver results are consistent with the results of (Shahzad et al., ; Skrivan, Skrivanova, Marounek, Tumova, & Wolf, ), while in other studies (Mroczek‐Sosnowska, Łukasiewicz et al., ; Payvastegan et al., ; Upadhaya, Lee, & Kim, ; Wang et al., ), the liver weight was not affected. It was reported that a high concentration of Cu‐NP negatively affected the histology of the liver, kidneys and spleen, but not the heart and lungs in rats, and these changes were well supported by organ weight changes (Lee et al., ).…”