mohammad houshmand; Mokhtar Khajavi; siamak parsaei
Volume 19, Issue 4 , March 2018, , Pages 891-904
Abstract
This experiment was conducted to investigate the effects of dietary inclusion of different levels of oak acorn(OA) with and without choline addition in broilers diet. A total of 528 one-day-old chicks were used in a factorial arrangement based on completely randomized design, with six treatments, four ...
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This experiment was conducted to investigate the effects of dietary inclusion of different levels of oak acorn(OA) with and without choline addition in broilers diet. A total of 528 one-day-old chicks were used in a factorial arrangement based on completely randomized design, with six treatments, four replicates and 22 chicks per each. Two studied factors were choline (0 and 0.3 % diet) and OA(0, 15 and 20% diet). In starter (d 1-21) and finisher (d 22-42) diets, corn was replaced with 15 and 20 % OA, without any change in percentage of other dietary feed ingredients. The findings indicated that feeding birds with diets containing 20 % OA reduced body weight gain during starter, finisher and entire period (d 1-42) of the study when compared to the diet without OA (P<0.05). Dietary inclusion of 15 and 20 % OA increased feed conversion ratio (except for 15 % OA in finisher phase) compared to the level of 0 %, throughout the study (P<0.05). Dietary supplementation with 0.3 % choline improved starter and overall feed conversion ratio(P<0.05).There was no significant interaction between OA level and choline for body weight gain, feed intake and feed conversion ratio. Replacing corn with OA resulted in a significant reduction in tibia bone ash weight/length index, at 42-day of age (P<0.05). In conclusion, substitution of corn with 15 and 20 % OA reduced the performance of broilers. Addition of choline did not prevent reduction in performance of OA-fed birds.
Mokhtar Khajavi; reza naghiha
Volume 19, Issue 4 , March 2018, , Pages 905-916
Abstract
This experiment was conducted to evaluate the effect of adding Ethanolic lemon pulp extract (ELPE) to drinking water of broiler chickens on performance, immune system and blood serum parameters. We used 450 male and female day-old broiler chicks (Cobb 500) allocated in a completely randomized design ...
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This experiment was conducted to evaluate the effect of adding Ethanolic lemon pulp extract (ELPE) to drinking water of broiler chickens on performance, immune system and blood serum parameters. We used 450 male and female day-old broiler chicks (Cobb 500) allocated in a completely randomized design with five treatments, five replications and 18 chicks per each. Treatments include no ELPE (control), 0.4, 0.8, 1.2 and 1.6 percent ELPE in drinking water from 2d until the end of experiment. Adding ELPE to drinking water did not have any effect on feed intake, average daily gain and Feed conversion ratio. The highest amount of IgM and the lowest amount of IgY belonged to group that fed 1.6 percent ELPE. ELPE treatments significantly increased response to Phytohemagglutinin-M (PHA-M) injection compared to control group. The levels of triglyceride, low density lipoprotein and very low density lipoprotein were significantly lower in 0.8 and 1.6 percent ELPE treatments compared to other groups (P<%5). For treatment with 1.2% of ELPE, the highest levels of cholesterol, triglycerides, low density lipoproteins, and very low-density lipoproteins were observed, which was significantly higher than other treatments (P<%5).Considering to reducing effects of 0.8 and 1.6 % extract treatments on blood parameters such as triglyceride, low density lipoprotein and very low-density lipoproteins compared to control, these two levels are recommended.