hossein pasha zanussi; farid shariatmadari; Mohsen sharafi; Hamed Ahmadi
Volume 22, Issue 1 , March 2020, , Pages 79-92
Abstract
This study was conducted to assess the effects of dietary flaxseed and sesame oils, on the semen parameters, fatty acid composition of sperm as well as the fertility and hatchability eggs from aged roosters. In a completely randomized design, 24 Ross-308 roosters (aged 45 week) assigned to ...
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This study was conducted to assess the effects of dietary flaxseed and sesame oils, on the semen parameters, fatty acid composition of sperm as well as the fertility and hatchability eggs from aged roosters. In a completely randomized design, 24 Ross-308 roosters (aged 45 week) assigned to four groups, comprising six replicates and one bird in each. The birds received different diets including basal diet (control), basal diet supplemented with 2% flaxseed oil (FO), basal diet supplemented with 2% sesame oil (SO) and basal diet supplemented with 1% flaxseed oil and 1% sesame oil (MO). The diets were iso-caloric and iso-nitrogenous, containing the same level of vitamin E. The roosters were fed diet for 60 days, during which semen samples were collected on 1st, 20th, 40th and 60th days and the samples were tested for different characteristics. The results indicated that different diets affected semen qualities, except semen volume and the morphology. The concentration, progressive motility, MDA as well as viability of sperms were significantly different during different times of the experiment. The sperm quality parameters including total and progressive motility as well as MDA turned out to improve in the roosters fed FO or MO. Furthermore, the integrity of sperm membrane, DHA and DPA concentration, as well as the fertility were higher in the treatment group containing FO. It seems that supplementation of aged rooster’s diet with flaxseed oil or mixed oils, together with vitamin E improves the semen qualities and it can be applied as an appropriate strategy to preserve the reproductive performance of aged rooters.
Mostafa Lotfy; farid shariatmadari; Hamed Ahmadi; Mohsen Sharafi
Volume 21, Issue 2 , July 2019, , Pages 223-232
Abstract
The purpose of this study was to develop multiple linear regression (MLR) model to predict the nitrogen-corrected true metabolizable energy (TMEn) value of wheat bran. The amount of crude fat, ash, crude protein, crude fiber (all used as % of DM) and TMEn (Kcal/kg DM) were measured in 25 wheat bran samples ...
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The purpose of this study was to develop multiple linear regression (MLR) model to predict the nitrogen-corrected true metabolizable energy (TMEn) value of wheat bran. The amount of crude fat, ash, crude protein, crude fiber (all used as % of DM) and TMEn (Kcal/kg DM) were measured in 25 wheat bran samples with 4 replicates. The force-fed method has been used to estimate TMEn and excreta were collected for 48 h. There were significant (P < 0.001) differences in chemical composition and TMEn of wheat bran samples. The average crude fat, ash, crude protein, crude fiber and TMEn content of samples was determined to be 4.80, 5.68, 16.23, 8.60 (all used as % of DM) and 2062 (Kcal/kg DM), respectively. The calculated MLR model to predict the TMEn value (Kcal/kg) based on chemical composition (% of DM) was obtained as follows: TMEn = 2364 + (19×crude protein) + (46.1×crude fat) – (63×crude fiber) – (51.1×ash). The R2 value revealed that developed model could accurately predict the TMEn of wheat bran samples (R2=0.82). Crude fat and crude protein had a positive effect on TMEn, while ash and crude fiber had a negative impact on TMEn. The sensitivity analysis on the model indicated that dietary crude fiber (%) is the most important variable in the TMEn, followed by dietary ash, crude fat and crude protein. The results suggest that the MLR model may be used to accurately estimate the TMEn value of wheat bran from its corresponding chemical composition.