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Articles by A. Zali
Total Records ( 4 ) for A. Zali
  S.R. Heidari Khormizi , M. Dehghan Banadaky , K. Rezayazdi and A. Zali
  Twenty four Holstein cows in early lactation (days in milk: 24±4) were allocated equally to one of four treatments. Treatments were as follows: control basal diet without supplement; LY basal diet supplemented with 10 g of live yeast; ANX basal diet supplemented with 30 g of Aspergillus niger extracted meal and LY+ANX basal diet supplemented with 10 g LY and 30 g ANX. Daily individual milk production and feed intake recorded and weekly milk samples were taken for milk composition analyse. Fecal grab samples were collected during 3 consecutive days at the end of experiment period from each cow. The experimental period lasted 75 days. Milk production was improved by 6.8% for group fed the LY compared control diet (p<0.05). Fat-corrected milk, feed efficiency, body weight and body condition score changes and DM intake were similar between groups. Greater protein yield and percentage were observed in the LY and LY+ANX groups compared to the control group (p<0.05). No differences were observed in other milk composition between groups. The apparent digestibility of DM and OM were higher (p<0.05) in the LY+ANX supplemented diet compared to the control. Similar to DM and organic matter digestibility, greater NDF apparent digestibility was observed in the LY+ANX supplemented diet versus the control that might be due to synergistic effects of feeding LY and ANX together. We concluded that LY might have potential as an effective direct-fed microbial to increase milk production in early lactating cows.
  M. Ranjbar , M.R. Naghavi , A. Zali and M.J. Aghaei
  Abstract: Principal component and cluster analyses were used to evaluate the pattern of morphological variation in 122 accessions of Aegilops crassa for 14 quantitative characters. With the principal component analysis, the first five principal components with eigenvalues more than 1 contributed 69.5% of the variability amongst accessions, whereas PC6 to PC14 were less than unity. Plant height, stem diameter, spike length and number of spikelets per spike were the most important characters in the first principal component. The germplasm was grouped into five clusters using cluster analysis. Although each cluster had some specific characteristics of its own, but clusters were not clearly separated when plotted by the first two principal components. Mahalanobis distances (D2) determined that plant height, stem diameter, spike length, number of spikelets per spike, node width, seed length, seed width and flowering date characters as the most important characters in differentiating the accessions. The morphological variation of Aegilops crassa accessions obtained in this study provides useful information for the future collection and makes these genetic resources more accessible to breeders.
  A. Zali and M. Ganjkhanlou
  This experiment was conducted to evaluate the effect of feeding frequency on non-carcass components and wholesale cuts in fat-tailed ram lambs of the Varaminni breed (n = 30, BW = 30.6±3.47 kg). Animals were assigned to three experimental groups according to their initial live body weights in a completely randomized design. The lambs in three groups fed with a TMR ration based on live body weight. First group (control) fed one daily, second group (treatment) fed twice times daily and third treatment fed four times per day. Live body weights recorded at 21 days intervals. Moreover, four lambs from each group were slaughtered and carcass characteristics were measured. Final BW, total BW gain and ADG did not differ (p>0.05). Tail fat content were significantly (p< 0.05) higher in control than those in experimental group. The other carcass characteristics were not significantly different in control with experimental groups. It was concluded that increase of feeding frequency in varaminni ram lambs (fat tailed lambs) resulted in decreased fat reservoirs thus may be beneficial for improving meet production and decrease in fat content of tail.
  A. Zali , A. Nik-Khah , A. Zare Shahneh , K. Rezayazdi and M. Ganjkhanlou
  This experiment was conducted to investigate the effect of feeding supplemental zinc (zinc sulfate) in different levels (0, 15 and 30 mg/kg) on ewes weight, milk production, Zn concentrations in serum and serum alkaline phosphates activity. Thirty lactating Varaminni ewes were assigned to three experimental groups according to their live body weights, milk production and lambs sex in a completely randomized design. Ewes were fed a basal diet containing alfalfa, wheat straw, cottonseed meal, barley grain, wheat bran, cracked corn and vitamin-mineral supplements at 3.2% of BW to meet NRC requirements for protein, energy, macro minerals and micro minerals. The basal diet contained 15 mg/kg Zn and Zinc sulfate was added to the basal diet to supply 30 or 45 mg/kg of dietary zinc. Milk yielded, milk composition and ewes` weight was recorded at 7 and 21 days intervals respectively. Samples of the blood were taken three times (0, 35 and 64) for determination of Concentration of Zn, Cu and Fe, Na, K, Ca in serum. Also serum alkaline phosphates concentration of ewes was measured. Milk yield, milk composition and ewes` weight of ewes were not affected by supplemental zinc (p>0.05). Alkaline phosphatase concentration was increased with supplemental zinc linearly and this increase was significant (p<0.05). Blood mineral concentration was not affected by treatment (p>0.05).
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