جستجوی مقالات مرتبط با کلیدواژه « Canola oil » در نشریات گروه « علوم دام »

One of the most important problems in the sheep breeding industry is its low reproduction capacity. According to the advances made in the field of reproduction, new methods have led to the improvement of the reproduction process. One of the important and effective indicators in reproduction is the level of energy used in the diet during the reproductive season. The use of fat supplements in the diet increases the energy density, and by reducing the inhibitory effects of the negative energy balance, it improves reproductive and productive performance. The right amount of oil consumption guarantees health and food safety. It is recommended that 10% or less of the energy needed by the body per day comes from saturated fat sources and 20-35% of daily energy comes from unsaturated fat. Due to the importance of oil seeds, their cultivation is also very important and they have a wide cultivated area all over the world. The purpose of this research was to investigate the effects of levels and sources of oil and fat on reproductive performance and blood factors of Kurdish sheep. The experiment was conducted at the Research Unit Farm of the Light Livestock Breeding Shightogan Delaware Company, located in the southern Khorasan province, Iran. Fifty-six ewes with Non-pregnant with an average age of one year and average body weight of 41.35±2.5 kg were divided into 7 treatments and 8 replications for 60 days (habituation period 14 days). Experimental treatments include: 1- base diet without oil, 2- Basic ration containing 2% sunflower oil, 3- Basic ration containing 2% canola oil, 4- Basic ration containing 2% tallow, 5- Basic ration containing 4% sunflower oil, 6- Basic ration containing 4% canola oil and 7- Basic ration It contained 4% tallow. Estral synchronization was performed in spring with CIDR. Ewes after CIDR (14 day) extraction and PMSG injection as soon as the signs of estrus were observed, the ewes were isolated from the others and artificially inseminated with fresh sperm using the transcortical method. Energy and chemical composition of rations were similar and were examined simultaneously with CIDR removal and estrus observation. Then, in each experiment parameters such as the time of estrus initiation (hour), rate of return to estrus, parturition rate, rate of multiple births, number of lambs and rate of lambing were evaluated Body weight (BW) and body growth measures were recorded First and period End. Data obtained were analyzed by statistical software SAS (version 1.9). Estral synchronization was performed in spring with CIDR. Ewes after CIDR (14 day) extraction and PMSG injection as soon as the signs of estrus were observed, the ewes were isolated from the others and artificially inseminated with fresh sperm using the transcortical method. The nutrition program with software (SRNS) version was adjusted based on the pregnancy diet. The results showed that the highest pregnancy rate (100%) and lambing rate (125%) were related to ewes receiving rations with 2% tallow oil and 4% sunflower oil. The highest increase in body weight was observed in ewes consuming ration with 2% sunflower oil, which was significantly different from the control group. But with other groups, this difference was insignificant. The highest body weight gain and the best (lowest) feed conversion ratio were observed in ewes consuming 2% sunflower oil diet, which was significantly different from the control group. But with other groups, this difference was insignificant. Triglyceride concentration, plasma total protein concentration and plasma albumin were not affected by oil and fat sources in the diets and no significant difference was observed between the diets. There was a significant difference in the average apparent digestibility coefficients of dry matter, crude fat and organic matter of nutrients between treatments. In general, use of vegetable and animal oils in the diet can positive effect on the productive and reproductive performance of sheep results of this research showed that in order to reduce the rate of consumption costs, 2% in the ration is suggested.

Fat is one of the most important nutrients in ruminant’s nutrition and its fate in the fermentation medium and rumen, is effective in the efficiency of feed usage. Awareness of digestibility and energy production of feeds and determine degradability of dry matter, neutral detergent fiber (NDF) and crude protein as a measurable nutrient, is valuable for formulating of balanced rations and correct understanding of degradability mechanism, digestion and uptake of nutrient for increase efficiency and income of farmers. In last of 1970 measure of gas production via incubation of feeds in buffered rumen liquid for assaying of digestibility properties of diets and fermentation kinetics were started with in vitro method. Whereas disappearance of dry matter, NDF predicted with nylon bag technique. In this experiment effect of different source of lipid on gas production (in vitro), dry matter, NDF and crud protein degradability (in Sacco) were assayed. Correlation coefficients of two experiment parameter were analyzed with Pearson method.

Two experiments were conducted to assess the fate and behavior of feed and the kinetics of digestion of three fat sources. In the first experiment, the amount of gas production from the digestion of four experimental treatments include : 1) no added lipid source (control) and 2, 3 and 4) with 5% calcium fatty acid, animal fat and rapeseed oil, respectively, incubated in rumen fluid, was measured with in vitro method. In the second trial 4 rumen fistulated Dalagh rams were allotted for measuring degradability parameters. In the second experiment, rumen fistulae male sheep were used to determine the biodegradability components of dry matter, fiber and crude protein in the above treatments by nylon bag method. Finally, the results of correlation between the two experiments were analyzed by Pearson method.

Gas production at the first 2 h of incubation was higher than other the lipid content treatments, not significant at 24 h and was significant at 96 h in the lipid source treatments than the control treatment. Organic matter digestibility, short chain volatile fatty acids production, and metabolizable energy in the gas test were significantly higher in the calcium fatty acid treatment than control, animal fat and rapeseed oil treatments (P <0.05). The dry matter degradability of calcium fatty acid treatment was more than other fat sources (P = 0.01). Crude protein degradability potential and fiber degradability were not significantly affected by different fat sources (P = 0.07). Degradability of NDF decreased slightly by adding fat sources. In this experiment, high correlations were observed in estimation of biodegradability and prediction parameters of dry matter, crude protein and NDF in experimental treatment in gas test and nylon bag technique.

Results of this study showed that gas production and biodegradability were different in treatments containing lipid sources. Diets containing protected fat with higher digestibility, produced more short chain fatty acids, higher metabolizable energy, and greater gas at 96 h after incubation in rumen fluid than animal fat and vegetable oil containing treatments. The highest effective degradability was observed at 5% flow level for dry matter, crude protein and NDF. All of these results indicate that incorporation of energy source with lipid sources especially protected fat has no adverse effect on fermentation and its use has increased fermentation efficiency. On the other hand, a high correlation was observed between the parameters of gas test (SCFA, ME and organic matter digestibility) and nylon bag technique (a, b and c) with Pearson method. Furthermore, gas test can be used with high efficiency to evaluate the lipid source added rations be instead of the costly method of nylon bag technique.

Effect of different oil sources on growth performance, carcass characteristics and blood metabolites of broilers was studied using 160 male Ross broiler chickens in a completely randomized design with 4 treatments, 4 replicates and 10 birds each. Treatments included: 1) basal diet plus soybean oil, 2) basal diet plus sunflower oil, 3) basal diet plus canola oil and 4) basal diet plus sesame oil. Effect of different oil sources on feed intake was not significant in different periods. In grower, finisher and whole periods, sesame and canola oil fed birds showed better weight gain and feed conversion ratio compared to other oil sources. The food cost was significantly higher for diets including sesame oil compared to others and birds fed sesame oil had lower profit than canola and soybean oil fed birds (P<0.05). The relative weight of carcass, breast and thigh was higher in broiler fed with sesame and canola oil (P<0.05). The blood cholesterol decreased significantly in sesame oil treatment (P<0.05). Considering the lower price and higher profit of canola oil containing diets compared to sesame oil and also better performance of birds fed sesame and canola oil, we would recommend using canola oil in broiler diets.

Introduction The terms of fat and oil refer to triglycerides of several profiles of fatty acids. Fatty acids that are not bound to other organic components as glycerol are the so-called free fatty acids. Lipids constitute the main energetic source for animals and they have the highest caloric value among all the nutrients. Linoleic acid is the only fatty acid whose dietetic requirement has been demonstrated. Besides supplying energy, the addition of fat to animal diets improves the absorption of fat-soluble vitamins, increases diet palatability, and the efficiency of utilization of the consumed energy. Furthermore, it reduces the rate of food passage through the gastrointestinal tract, which allows a better absorption of all nutrients present in the diet. The energetic value of oils and fats depend on the following: the length of the carbonic chain, the number of double bonds, the presence or absence of ester bonds (triglycerides or free fatty acids), the specific arrangements of the saturated and unsaturated fatty acids on the glycerol backbone, the composition of the free fatty acid, the composition of the diet, the quantity and the type of the triglycerides supplemented in the diet, the intestinal flora, the sex and the age of the birds.
Dietary energy is one of the major effective nutrient, representing high percent of total cost of the diets for broilers. Diet energy has important effects on the regulation of the amount feed intake and performance in broilers. Fats are the main sources of energy in broiler diets. Different research showed that the advantages of fats especially in low energy diets.
Materials and Methods This experiment was conducted as a (2*2*2) factorial arrangement including 2 fat sources (tallow fat and canola oil), 2 levels of fat (3% and 6%), and two levels of diet metabolizable energy (2900 and 3100 Kcal.Kg) with 432 Ross-308 broilers in 8 treatments, 4 replicates and 12 chicks in each replicate in two experiment period (grower from 11 to 24 days and finisher from 25 to 42 days) in a completely randomized design. Chicks were fed from 1 to 10 days with a common starter diet that recommended by Ross company. During experiment periods all birds had free access to water and feed. Measuring of weight gain and feed intake were done at the end of experimental periods and feed conversion ratio was calculating by dividing the amount of feed intake to the amount of weight gain. Carcass traits were measured at the end experiment period by killing 2 birds from each replicate. Blood sampling was done at the end of experimental period.
Results and Discussion At the end of experimental period, using canola oil in contrast to beef tallow reduced the amount of daily feed intake, whereas improved the feed conversion ratio, final weight and production index (P0.05). Diet with 3100 Kcal.Kg ME caused the amount of weight gain and production index increase and feed conversion improve (P0.05). Interaction between fat sources, fat level and energy level, using 3% and 6% of canola oil increased the amounts of daily feed intake, daily weight gain and final weight and feed conversion ratio improved (P0.05). Diet with beef tallow increased the amount of HDL in blood (PConclusion The overall results showed that in broilers, using diet with 3100 Kcal/Kg metabolizable energy and canola oil up to 6% have positive results in broilers, but using more than 3% tallow have negative effect on broiler performance.

This study was carried out to examine the effect of supplementation of canola and fish oils (5% fish oil, 3% fish oil 2% canola oil, 2% fish oil 3% canola oil and 5% canola oil) and Satureja khuzistanica essential oils (SkEO) (0 and 400 mg/kg), into a basal diet on productive performance, meat cholesterol, lipid stability and certain blood lipid components in broiler chickens raised under normal and heat stress conditions during day 22 to 42 of age. The experiment was conducted in a 4×2×2 factorial expriment using 640 one-day-old Ross 308 chicks in a completely randomised blocks design with 5 replicates of 8 birds in each replication. Oil source significantly decreased FCR, serum LDL and cholesterol content in thigh and breast muscles at day 42 of age. Inclusion of 400 mg/kg SkEO in diet significantly increased daily weight gain and decreased cholesterol content and TBARS concentration in thigh and breast muscles in heat stressed chicks. Heat stress condition significantly decreased FCR and increased TBARS as well as cholesterol content in breast muscle and serum cholesterol concentration during day 22 to 42 of age. It was concluded that supplementation of 400 mg/kg SkEO and canola oil into diet could have a positive effect on productive performance and reduce the meat and serum cholesterol concentration in broiler chicken.

Omega-3 fatty acids and their ratio to omega-6 fatty acids have a significant impact on community health and reduction of cardiovascular diseases, arthritis and diabetes.
This study was conducted to evaluate the effects of canola oil and lysine on performance, meat fatty acid composition and blood lipid parameters in broiler chicks.
A total of 240 day old Ross broiler chicks were used in a 3×2 factorial arrangement with canola oil (1, 3 and 5%) and lysine (recommended, and 25% more than recommended by Ross manual) in a completely randomized design with 4 replicates and 10 birds per each. At 42 d, two birds were randomly selected and slaughtered. Then, fatty acid profile of breast meat was determined.
The weight gain of chickens fed diets containing 5% canola oil were greater than those birds fed on other diets (P It can be concluded that diet containing 5% canola oil and recommended lysine level, improves weight gain, but have no any effects on unsaturated fatty acids of breast meat in broilers.

In recent years, the supplementation of farm animal’s diet with oils has received attention, due to their content of some fatty acids beneficial to human health, such as linoleic and linolenic acids. This study was carried out to investigate the effects of different plant sources of beneficial fatty acids (canola oil and soybean oil) and fish oil, separately or mixed on growth performance and nutrient digestibility in fattening lambs.
Thirty-five male lambs with an initial body weight of 27.8 ± 2 kg and 4-5 months old were used in a completely randomized design for a 84-day feeding experiment with a 14-day adaptation period. Experimental treatments included: 1- control diet based (without oil), 2- diet with 3 % fish oil, 3- diet with 3 % canola oil, 4- diet with 3 % soybean oil 5- diet with 1.5 % fish oil 1.5 % canola oil, 6- diet with 1.5 % fish oil 1.5 % soybean oil, 7- diet with 1.5 % canola oil 1.5 % fish oil. Five lambs were then randomly allocated to each treatment. At the 70 day of period faeces output and feed intake samples were collected to determination of nutrient digestibility with acid insoluble ash method.
The results of current study showed that the experimental diets had significant effect on daily weight gain of lambs (P0.05). Oil supplementation did not affect on dry matter intake (DMI) and feed conversion ratio (FCR) during total feeding trial (P>0.05). Digestibility of organic matter, neutral detergent fiber, acid detergent fiber and ether extrac did not affected, but digestibility of dry matter (DM) in control group was higher than that of other treatments (P The results of current study showed that soybean oil and canola oil at 3% can be used in lamb’s finishing diets without adverse effect on performance of lambs. While, the use of fish oil at this level is not recommended.

To investigate the effects of oregano essential oil and canola oil on digestibility, ruminal pH and ammonia and carcass quality of fattening Dalagh lambs, an experiment was conducted with 16 lambs with an average live weight of 25±2 kg in a completely randomized design with 4 treatments (Control diet based on barley grain and corn silage without canola oil and oregano essential oil, control diet supplemented with 2 % canola oil, control diet supplemented with 2 % canola oil and 0.2 % oregano essential oil and diet supplemented with 0.2 % oregano essential oil) and 4 replicates for 80 days. Results indicated that the NDF digestibility (60.06, 54.77, 52.56 and 55.73 respectively) was significantly decreased in lambs fed diet containing canola oil and oregano essential oil. Concentration of ruminal ammonia had significantly decreased with adding oregano essential oil in level 0.2% to the diet. The results also showed that pH and index of meat light color not affected by dietary treatments, whereas color parameters (yellowness–redness) appeared to decrease in control treatment. Amount of thiobarbituric acid was lower in thigh meat stored for 63 days after slaughtering in group received oregano essential oil. According to the results, use of oregano essential oil had favorable effect on ruminal ammonia concentration and the oxidative stability of meat in a long time so it would be considered for storing meat in fridges.

This study aimed to evaluating the effects of canola oil and oregano oil on performance, carcass components, blood parameters, and chemical compositions of Dalagh fattening lambs. 16 Dalagh male lambs with an average weight of 25 ± 2 kg in a completely randomized design allocated to four treatments and four replications over 80 days. Experimental treatments included: 1- control diet based without canola oil and oregano essential oil, 2- Control diet supplemented with 2 % canola oil, 3- Control diet supplemented with 2 % canola oil and 0.2 % oregano essential oil and 4- diet supplemented with 0.2 % oregano essential oil. Sheep fed by diets supplemented with canola oil and oregano oil had highest in full carcass, fresh carcass and tight weight (P<0.05). In addition, sheep fattened by oregano essence treatment and control treatment had lowest and highest in abdominal fat and half rump weight, respectively (P<0.05). The amounts of plasma glucose, total cholesterol, triglyceride, HDL and LDL were significantly affected by the treatments (P<0.05). Also, albumin, total protein and urea nitrogen of serum were not significantly affected by a treatments (P>0.05).The results showed that addition of oregano essential oil plus to canola oil proved performance, and also adding 0.2% oregano essential oil in comparison to other treatments led to positive effects on blood parameters.