Ebrahim Rowghani

IntroductionThe hypothalamic-pituitary-gonad axis plays an important role in regulating reproductive activities through hormonal control. Since the synthesis and secretion of androgens is the result of the activity of this axis. It is effective in creating differentiation and secondary sexual traits. Due to the high sensitivity of the reproductive process, it is important to know the factors that ...

IntroductionNowadays production of dairy cattle has become a sophisticated money-making industry throughout the world. For many producers, production traits, e.g. milk, fat and protein yield still form the cornerstone of many breeding plans. In general, no breeding plan could be sustained without genetically addressing and exploring these traits. A recent study indicated that, milk yield per cow p ...

1. INTRODUCTIONHot environmental conditions are a problem for poultry producers in many areas of the world, particularly in the humid and hot tropics and sub-tropics. Some studies investigated the influence of thermal environment and dietary nutrient level on the productive traits of broiler chickens (Gu et al., 2008; Attia et al., 2011). The nutrient requirements of poultry are altered as the env ...

IntroductionTraditionally, ensiling was used to preserve forage material for feeding animals after the cropping seasons. Recently, this method has a potential to store the large quantities of biomass feed stocks to produce energy through lignocellulosic ethanol production (Sipos et al., 2009). Similarly, there is a growing interest in sweet sorghum (Sorghum bicolor) in recent years because it has ...

IntroductionSweet sorghum (Sorghum bicolor var. saccharatum) is a C4 plant with high photosynthetic activity, resistant to drought and salinity (Almodares et al., 2008), contains a high level of energy (Negro et al., 1999) and can be cultivated in most tropical areas. Also, sweet sorghum stem juice can be used for production of ethanol as a bio fuel (Almodares and Hadi, 2009). There has been a gro ...