2010 Cilt 4 Sayı 10

Permanent URI for this collectionhttps://hdl.handle.net/11452/16908

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Browsing by Department "Veteriner Fakültesi"

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    The effect of starch sources with different degradability rates on milk production and composition in lactating cows
    (Uludağ Üniversitesi, 2010) Gulmez, Bulent Haluk; Gencoglu, Hidir; Biricik, Hakan; Deniz, Gulay; Kara, Çağdaş; Balci, Faruk; Turkmen, Ibrahim Ismet; Veteriner Fakültesi
    The purpose of this study was to investigate the effect of starch sources with different degradability rates on chewing activities, milk production and composition of lactating dairy cows. Twelve lactating Holstein cows were used in a 4 x 4 Latin square design and fed with diets containing different rates of corn and wheat. The diets were: 1) 26.20% corn based diet (CBD), 2) 16.10% corn and 7.09% wheat based diet (CWBD), 3) 16.51% wheat and 7.26% corn based diet (WCBD), or 4) 25.88% wheat based diet (WBD). The eating, ruminating and total chewing time were not affected by the treatments and time spent total chewing time ranged from 761 to 801 min/d. Cows fed with CBD higher milk production, fat, protein and lactose yield than did cows fed with WCBD and WBD (P<0.05). The fat, protein, and lactose yield were greater for cows fed CBD than for cows fed WBD due to cows fed CBD produce more milk yield compared with cows fed WBD (P<0.05). The milk fat percentages ranged from 3.89 to 4.18%, protein percentages ranged from 3.38 to 3.52%, and lactose percentages ranged from 4.86 to 4.93%, and were not affected by dietary treatments. These results showed that milk production and milk yield compositions were increased by replacing wheat with ground corn.
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    Effects of supplementary nutrition in awassi ewes on sexual behaviors and reproductive traits
    (Uludağ Üniversitesi, 2010) Kara, Çağdaş; Orman, Abdulkadir; Topal, Ersin; Çarkungöz, Ender; Veteriner Fakültesi
    The present study was conducted to improve sexual behavior in Awassi ewes by the nutritional supplement containing multiple nutrients, such as vitamins, minerals, amino acids and sorbitol. In addition, the purpose of this study was to evaluate the effect of this nutritional supplement on litter size in ewes and birth weight of lambs. Twenty six Awassi ewes (50 ± 3.20 kg), aged 2 to 4 years, and three sexually experienced Awassi rams (90 ± 5.30 kg), aged 3 years, were used. The ewes were sorted by age, body weight and litter size of them in previous years and assigned to one of the two groups (experimental; EG and control; CG). Each group consisted of 13 ewes. The daily ration of the ewes in EG was added 30 g/ewe the nutritional supplement for 5 days before mating period and 5 days during last month of gestation. Despite the fact that there were no statistically differences for sexual behaviors, the number of lambs born, lambing percentage and birth weights of lambs between groups (p > 0.05), our results showed that the combination of nutrients improving animal health and reproduction had a positive effect on embryonic survival, litter size and birth weight.
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    The effects on metabolism of glucosinolates and theirs hydrolysis products
    (Uludağ Üniversitesi, 2010) Polat, Umit; Veteriner Fakültesi
    Glucosinolates in the nutrition are very important molecules and widely found in Brassicaceae species (brussels sprouts, Dijon mustard, broccoli, cress etc.). Depending on the amount of these kinds of vegetables consumed by humans and animals, some positive or negative metabolic effects of this molecule may occur. Chemically GLS’s are the anticarsinogenic molecules that increase the antioxidan effect, the antibiotic activity and induced the phase-II detoxification enzymes. However, there are the studies shown that I3C, a member of the hydrolysis products of GLS’s, stimulated and inhibited the carsinogenesis. While the low doses of GLS's may be the antiostrogenic effect, the high doses can an estrogen agonist. Due to the lack of scientific data regarding the dose of the molecule that induces favorable and unfavorable effects on the target tissue, our knowledge of this molecule on induction of potential carcinogenic/anticarcinogenic, estrogenic/antiestrogenic, antibiotic effects as well as on regulation of energy balance remains largely insufficient. They constitute the liver, thyroid, rectum abnormalities, and deterioration in the development and reproductive performance. Especially the biological effects, that defines the need to study GLS bioavailability, critically assess the current state of the art on GLS bioavailability, indicate human and animal data on important individual compounds and structural groups, and give recommendations for future research.