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Articles by N. Denek
Total Records ( 6 ) for N. Denek
  M. Avci , N. Denek and O. Kaplan
  The current trial was carried out to determine the effects of humic acid at different levels on body weight gain, feed consumption, feed efficiency, carcass yield, heart weight and some biochemical parameters of quails. A total of 260 Japanese quails, seven day old were randomly assigned to one control and three experimental groups. The experimental period lasted five weeks. The quails were fed with a basal diet or the basal diet supplemented with 360, 480 and 600 mg kg-1 humic acid . Body weight gain, feed conversion ratio were positively influenced (p<0.01) by humic acid (480 mg kg-1) supplementation at the growing period. Difference among the groups in terms of carcass yields, heart weight and biochemical parameters such as phosphorus, potassium, iron, copper, zinc, total protein, glucose, cholesterol, triglyceride, VLDL were not statistically significant. Calcium levels were significantly increased in the experimental groups compared with the control group (p<0.05). As a result; dietary humic acid supplementation during growing period at dose rate of 480 mg kg-1 feed can be used to improve body weight gainand feed efficiency.
  N. Denek and A. Can
  This study was carried out to investigate effect of no additives (control) or 10% wheat straw, 10% wheat straw+0.5% urea, 10% wheat straw+5% molasses, 10% wheat straw+5% wheat grain, 10% wheat straw+0.5% urea+5% molasses and 10% wheat straw+0.5% urea+5% wheat grain (weight basis) on silage quality and in vitro dry matter digestibility of wet orange pulp. Contents of dry matter, crude protein, ADF, NDF, pH values In vitro dry matter digestibilities and fleig points of wet orange pulp were in range of 14.62-22.26, 7.62-14.17, 30.97-41.46, 51.02-56.22, 3.60-4.13, 51.58-80.62 and 81.85-101.73%, respectively (p<0.05). As a result, wet orange pulp can be ensiled well with or without additives, but addition 10% of wheat straw would be benificial to eliminate negative effects related with the high moisture content of wet orange puple.
  Can, A. , N. Denek , E. Alicioglu , K. Yazgan , M. Seker and H. Ipek
  Two apparent digestion trials were conducted to determine the effect of corn grain particle size on nutrient digestibility using nine Awassi ram lambs (48.3 ? 3.2 kg). They were allocated to three treatments (3 per treatment) at random within live weight. Three treatments were used in completely randomized design with three millings degrees which included: 4mm (fine), 6 mm (coarse) and (70%) coarse + whole grain (30%) (coarse+whole) of ground corn in both apparent digestion trials. Corn:alfalfa ratios were 40:60 in trial 1 and 85:15 in trial 2. Diets were offered 2.5% of body weighs as fed basis. In trial 1, corn particle size did not DM, OM and ADF digestibility (P>0.05). Moreover, rumen fluid pH and protozoa number did not change due to dietary treatments (P>0.05). Crude protein digestibility was greater for coarse than the other two dietary treatments. In trial 2, Finely grinding decreased DM and OM digestibilities (P<0.05). Acid Detergent Fibre and CP digestibilities were not altered by the treatments (P>0.05). Rumen fluid pH was lower for finely grinding (P<0.05) compared to coarse or coarse+whole. Protozoa number also numerically decreased with finely grinding. As a result, there was no advantage of feeding finely ground corn compared with the coarsely ground or coarse+whole corn on nutrient digestibility and ruminal parameters.
  N. Denek , E. Polat , S. Koncagul and A. Can
  This study was carried out to determine incubation time and amount of horse fecal content for measuring in vitro dry matter digestibility of roughages (barley straw, wheat straw, lentil straw, wheat silage, corn silage and alfalfa hay) and their comparison with in vivo digestibility values. In in vitro study, inoculums were prepared using 100, 150, 200, 250, 300, 330, 500, 660 ve 1000 g faeces for per liter of buffer. Roughages were incubated with these inoculums at two incubation times (48 vs 72 h) before 48 h pepsin-HCl digestion. Six fat tailed Awassi rams (42.72.5 kg) at the age of two years were used as experimental animals (3 per treatments) in an apparent digestibility experiment. According to result of this study, the best equation for estimating in vivo DM digestibilities was obtained with usage of inoculum containing 250 g faeces for per liter buffer solution at length of 48 h incubation (r = 0.93, Y = 24.11 (2.57) + 0.62 (0.05) X, R2 = 0.87 ve RSD = 3.19) and 660 g faeces for per liter buffer solution at length of 72 h incubation (r = 0.94, Y = 16.08 (2.88) + 0.72 (0.05) X, R2 = 0.89 ve RSD = 2.88). Even though, result from this study showed that horse faecal fluid had high potential to be used for predicting in vivo DM digestibility, further researches dealing with larger number of feeds with known in vivo DM digestibility are required to improve usage horse faecal fluid for in vitro inoculums source.
  A. Can , N. Denek and K. Yazgan
  This study is carried out to determine effect of different level of urea and molasses liquid supplementation on nutrient intake, digestibility and rumen parameters of wheat straw fed Awassi ram lambs. Total fifteen 2 years old Awassi ram lambs (44.40 ? 2.0 kg) were allocated to five treatments (3 per treatment) at random within live weight. Treatments were wheat straw (Control; C), WS + 0.75% urea and 10% molasses (T1), WS + 1.5% urea+ 10% molasses (T2), WS + 0.75 %urea + 20% molasses (T3), and WS + 1.5 %urea + 20% molasses (T3) as fed basis. Supplementing urea and molasses increased DMI and OMI of ram lambs (P <0.05). Increasing urea level from 0.75 to 1.50% and molases level from 10 to 20% did not changed DMI or OMI (P>0.05). Dry matter and OM digestibility of wheat straw control diet (C) were found lower than urea and molasses supplemented treatment diets (P <0.01). Control diet consuming animals had a lower CP digestibility than urea and molasses supplemented animals (P<0.05). Increment both urea (T1-T3 vs T2-T4) and molasses (T1-T2 vs T3-T4) increased CP digestibility of diets. Control (WS) diet had a lower NDF digestibility than urea and molasses supplemented treatment diets (P <0.01). While increasing molasses level (T1-T2 vs T3-T4) did not affect NDF digestibility (P>0.05), increment of urea (T1-T3 vs T2-T4) improved NDF digestibility (P <0.05). ADF digestibilities of control (WS) and treatment diets were found similar (P> 0.05). Increment of molasses levels (T1-T2 vs T3-T4) and urea levels (T1-T3 vs T2-T4) increased ADF digestibilities of diets (P<0.01). Ruminal pH was similar for the different diets, while NH3-N (mg/100 ml) was higher (P< 0.01) for the treatments diet. As a conclusion, supplementation with urea and molasses improved rumen environment, feed intake and digestibility in Awassi ram lambs fed wheat straw.
  N. Denek , O. Kaplan , M. Avci and A. Can
  This study was carried out to investigate the use of different levels of phytase enzyme supplementation on the growth performance, carcass yield, oxidative stress, faecal phosphorus and biochemical parameters of Japanese quails. Total of 220 Japanese quails (Coturnix coturnix japonica) at three-day old age were used. The birds were randomly assigned to one control and three experimental groups based on their initial body weight, comprising five replicates with 11 birds each. They were fed a basal diet (Control) or the basal diet supplemented with either 500 FTU kg 1 (Group I), 750 FTU kg 1 (Group II) or 1000 FTU kg 1 (Group III) of microbial phytase (Peniophora lycii, containing 500 FTU kg 1 phytase activities). As a result, phytase supplementation to diets of quails didn`t affect growth performance and oxidative stress parameters (p>0.05); however, it decreased faecal phosphorus content (p< 0.05) and serum potassium level (p< 0.01) and increased triglycerides and serum VLDL levels (p< 0.05).
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