Study of Wheat Response to Nitrogen Fertilization, Micronutrients and their Effects on Some Soil Available Macronutrients

Abstract

the fractional composition of proteins.Increasing fertilizer level up to 90 kg N /fed significantly increased yield and yield components compared with lower fertilizer levels and the control .Also, foliar application with mixture of micronutrients in addition to fertilizing with 90 kg N fed -1 can maximize wheat grain and straw yields and gave the best quality parameter of grains (Seadh et al., 2009).On the other hand, increasing nitrogen fertilizer rates (75, 100, 125 kg N/feddan) resulted in significant increase in grain yield, straw yield and biological yield (Ibrahim et al., 2014).Micronutrients play key roles in the release of carbon dioxide, and in optimizing the function of vitamin A and the immune system, as stated by Marschner (1995).Zinc (Zn) is known to have an important role either as a metal component of enzymes or as a functional, structural or regulatory cofactor of a large number of enzymes (Grotz &Guerinot 2006 andCakmak, 2008).Grain yield, straw yield, 1000-grain weight and number of grains/spike, Fe, Mn and Zn concentration in flag leaves and grains as well as protein content in grain