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Articles by Nasrollah Vali
Total Records ( 6 ) for Nasrollah Vali
  Nasrollah Vali
  A study was conducted to compare Body Weight (BW), feed intake, feed efficiency up to 49 days of age and carcass characteristics of two quail strains namely, (Co: Japanese quail (Coturnix japonica), Ra: Range quail (Coturnix ypsilophorus) and their reciprocal crosses H1: Hybrid 1(Ra♂xCo♀) and H2: Hybrid 2 (Co♂xRa♀) in four hatches. Body weights of four groups (Co, Ra, H1 and H2) at 1, 7, 14, 21, 28, 35, 42, 49, 56 and 63 days of ages between of four groups were significantly different (p<0.1). Body weight of female at 49, 56 and 63 days of age were significantly higher than males, but there was no significant difference between male and females at the other recorded BW (p>0.05). Feed intake of H2 group was also significantly larger than that other groups (p<0.01), while feed efficiency of four groups were not different (p>0.05). At 49 days of age, Carcass percentages, breast percents, wing weights and giblet weights of four groups were significantly different (p<0.01), while there was no significant difference for carcass weights (eviscerated), breast weights, carcass rests (thigh, leg and back) among them (p>0.05). Carcass weights, carcass percents, breast weights were significantly affected by sex (p<0.01), while sex for breast percents was not effective (p>0.05). Heterosis percents for the BW at 1 to 63 days of ages were estimated. Heterosis was positive for BW at 1, 14, 21, 28, 49, 56 and 63 days of ages, while other of ages was negative.
  Nasrollah Vali
  A total of 210, 3-d-old Japanese quail chicks (Coturnix japonica) allocated to 21 cages, each cage containing 10 chicks, that were received seven diets with three replication of each diet. Experimental diets were arranged with five levels 150, 300, 600, 1200 and 2400 phytase enzyme unit (FTU kg-1) with commercial name (Natuphos 500) as treatments1, 2, 3, 4 and 5, respectively and two control groups (positive and negative controls). At the end of each experimental period (each week to 45 days of ages), birds were weighed and feed consumption was recorded for feed efficiency computation. At the age of 45 days, four chicks were randomly selected from each treatment blood samples for subsequent determination of minerals (Ca, P and Mg) and alkaline phosphates (ALP) in serum. Data were subjected to analysis of variance using the General Linear Models (GLM) procedures of SAS software. Data showed that feed efficiency was not affected at periods of 9-16 and 37- 45 days of ages by addition of phytase, but in other periods were significantly different (p<0.05). Liver weight in treatment 5 (4.68±0.23 g) at 45 days of age was more than other groups that had significant difference (p<0.05). Quails of treatment 4 had Calcium (Ca) and Phosphorus (P) 10.19±0.80, 7.11±0.46 mg dL-1, respectively that were more than other groups. The amount of Magnesium on treatment 1(3.27±0.15 g), positive control (3.27±0.15 g) and negative control (3.56±0.15 g) which were not significantly different (p>0.05), whereas treatment1 and control groups had significant differences with other treatments (p>0.05). The Alkaline phosphates of treatment 5 (366.83±38.07 IU L-1) in blood serum at 45 days of age represents the most increase among other treatments, which had significant differences with treatment 1 (124.99±50.80 IU L-1) and control groups, although weren’t significant difference with the treatments 2 (260.26±50.01 IU L-1) and treatments 3 (288.37±40.64 IU L-1).
  Nasrollah Vali , M.A. Edriss and H. Moshtaghi
  In order to investigate egg weight of two quail strains 2550 eggs of Japanese quail (Coturnix japanese) and 1975 eggs of Range quail (Coturnix ypisilophorus) were weighted individually at three age groups (first group: 60-145, second group: 145-230, and last group: 300-385 days of age). Body weights of two strains were not significantly different (p>0.05). Body weights at 60 days age were significantly different (p< 0.01), but there were not any significant difference between the ages of 145 and 300 days (p>0.05). Egg weight of Japanese quails and Range quails were 11.23±0.03 and 11.17±0.05 respectively which were not significantly different (p>0.05). Effects of the interaction of strain, age and sex for egg weight and body weight were significantly different (p< 0.01). Minimum and maximum egg weight for Japanese quail were 7.08 and 13.84gr respectively, however these records were 7.01 and 13.84gr for Range quail. Individual variation of in two strains for eggs weight were significantly different (p< 0.01).
  Nasrollah Vali
  The Japanese quail belongs to the order Galformes, family Phasidae, genus Coturnix and species japonica. Several aspects account for the utility of this bird. First, it has attained economic importance as an agricultural species producing eggs and meat that are enjoyed for their unique flavor. Egg production is important in Japan and Southeast Asia, while meat is the main product in Europe. Second, the low maintenance cost associated with its small body size (80-300 g) coupled with its short generation interval, (3-4 generation per year), resistance to diseases and high egg production, rendered it an excellent laboratory animal. Third, Japanese quail also is the smallest avian species farmed for meat and egg production. It has thus been used extensively in many studies. The Japanese quail is bred for egg and meat production. Few studies have been published on egg production but, reports on quail growth and body composition are numerous. Some of the estimated genetic parameters for various traits of Japanese quail were reported by several workers.
  Nasrollah Vali
  The digestive tract must supply the factors necessary for the existence of any micro-organism that finally becomes established. These factors include a favorable temperature, a constant supply of nutrients and essential fluids: In this situation the micro-organisms benefit from the environment and the animal benefits by maintaining a microflora that does not cause any disease state. There are generally two different types of bacterial populations which can become established in the digestive tract. The first is that which exists in close association with the gut epithelium and the second is that which occurs free in the gut lumen. The ideal situation throughout the life of any animal would be to maintain specific numbers of beneficial bacteria in the digestive tract. This would ensure that at all times the animal would have the proper microbial balance. The term “probiotic ” has been used to indicate substances or micro-organisms which contribute to an ideal microbial balance. Today probiotics are considered as those viable microorganisms that when administered to man and animal, beneficially affects the host by improving the properties of the indigenous microflora. To maintain the intestinal microflora balance in animals it is important to prevent diseases by controlling the overgrowth of potentially pathogenic bacteria. Although known since a long time, only in the last two decades probiotics have started to receive major attention from researchers, and several studies have been carried out on the effects of probiotics microorganisms, using different formulae and with numerous purposes of preventing or treating diseases.
  Nasrollah Vali
  One of the sources that, provide protein in developing countries, is native chicken. So, they should be taken into consideration in poultry improvement programs. Indeed, egg and meat production of indigenous chickens in Iran have been considered by different researchers. In this study, various works have been studied for different years and investigated some results regarding laying and meat production traits of Iranian indigenous chickens, as well as their crossings with exotic breeds.
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