Sahar Mohammadzadeh; Tohid Vahdatpour; Yahya Ebrahimnezhad
Volume 20, Issue 3 , Autumn 2018, , Pages 477-486
Abstract
Effects of vitamins K1 and K3 addition to a low calcium diet on the structure of tibia bone and performance of Japanese quail were evaluated by using 192 birds in a completely randomized design with four treatments, four replicates and 12 birds per each. The treatments included: diet containing the recommended ...
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Effects of vitamins K1 and K3 addition to a low calcium diet on the structure of tibia bone and performance of Japanese quail were evaluated by using 192 birds in a completely randomized design with four treatments, four replicates and 12 birds per each. The treatments included: diet containing the recommended level of calcium (control), low calcium diet (70% of recommended level), low calcium + vitamin K1, and low calcium diet + vitamin K3. The quails consumed a greater amount of calcium deficiency diet (P<0.05). Feed intake decreased by supplementing diets by vitamin K1. The live weight of birds fed low calcium diet was lower than control birds (P<0.05). The live body weight and FCR improved by supplementing low calcium diet with K1 or K3 (P<0.05). Maximum diameter of diaphysis increased in birds fed on diet containing K3, but the minimum diameter of diaphysis increased by feeding diets containing K1 or K3 (P<0.05). The bone middle canal increased in birds fed low calcium diet (P<0.05). There had no difference in bone middle canal between birds fed on diet containing K1and control diet. In birds fed K1 supplemented diet the bone ash weight was lower and length of bone was higher than those fed on diets containing K3 (P<0.05).According to the these results, addition vitamin K1 to low calcium diet improves the growth performance and bone physical properties in female quails.
mohammad houshmand; Mokhtar Khajavi; siamak parsaei
Volume 19, Issue 4 , Winter 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.