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Articles by A. Gerami
Total Records ( 2 ) for A. Gerami
  S. Gharahveysi , N. Emam Jome Kashan , A. Gerami and R. Vaez Torshizi
  Arab horse is a popular pure breed in Iran and is registered by World Arabian Horse Organization (WAHO). There is no scientific study and research about this breed. In this research 13 conformation traits on a random sample of the Iranian Arab horses studied. The estimate of variance components estimated by Animal Model and Derivative Free Restricted Maximum Likelihood (DF-REML) approach and DF-REML software. Heritability of conformation traits is also evaluated. The range of estimated heritability were (0.050 ±0.008) neck length and (0.614 ±0.087) croup height. Results indicated that, conformation traits were good traits for selection and horse genetic evaluation.
  N. Ziaei , M. Shivazad , S.A. Mirhadi and A. Gerami
  The aim of this experiment was to examine the potential for reduced environmental impact by reducing dietary calcium and phosphorus content and phytase addition of laying hen diets. A randomized complete block design with a 2x2x2 factorial arrangement of 8 dietary treatments: 2 levels of phytase (0 and 300 FTU kg-1) and 2 mineral levels (Ca: 34/18 and NPP: 3.2/2.2 g kg-1, respectively). A total of 240 White Leghorn (WL) layers, 25 weeks of age were used. Considering birds in 12 cages as a replicate, 5 such replicates were randomly allotted to each dietary treatment. Individual body weight of the bird was recorded at the beginning and end of the experiment. Egg production on an individual basis was recorded daily and percentage hen day egg production was calculated. The cleaned eggshells were dried for 24 h, weighed and expressed as percentage of whole egg. One bird from each experimental unit were selected at random and killed by cervical dislocation at the end of the experiment and the left tibia was removed. Dried bone samples were ashed at 680° C for 12 h for estimation of bone ash. The results of this experiment showed that reducing Ca and NPP (Non-Phytate Phosphorus) without phytase decreased BWG (Body Weight Gain), feed intake, FCE (Feed Conversion Efficiency), egg production, egg shell weight and tibia ash. However, phytase addition to low mineral diets completely corrected the adverse effects associated with low dietary Ca and NPP. It can therefore be concluded that reducing levels of Ca and NPP below current standards and phytase supplementation can reduce pollution potential from laying hen production without adversely affecting bird performance or welfare.
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