Osman, E. A.M. ; H. M. M. Seyam and M. M. A. Ramadan( 2012). Organic and inorganic nitrogen fertilizer on broad bean grown in calcareous soil under a saline irrigation water and its stress Egypt . J. of Appl. Sci., 27 (5) 2012 311-322
Abstract: Broad bean plants response to the effect of organic and inorganic nitrogen fertilizer usually differs and interacts with different available soil water deficit. Two field experiments were conducted during both growing seasons 2009/2010 and 2010/2011 using faba bean plant (variety Giza 643), at the El- Areish Research Station in Egypt, plants were growing on calcareous soil with receiving various levels of N applied (30 kg N/fed, 20 kg N/fed + 10 m3 organic manure (FYM) and 10 kg N/fed + 20 m3 organic manure) through the soil moisture samples at depletion of 40, 60, and 80 % from soil moisture content to manifest such response on bean plant growth and its nutritional status under a saline irrigation water.
Obtained results show that the broad bean plant growth (plant height, number of branches, pods /plant and seed weight/plant as well as seed, straw and biological yield) and its nutritional status (N, P and K content of seed and straw) were significantly responded to increasing available soil water and fertilization by inorganic N in combined with organic manure particularly in both seasons. The superior value being at 60% of available soil water with addition of 10Kg N/fed as combined with 20 m3 organic manure, but the lowest values of such parameters being at 20% of available soil water with sole application of mineral N fertilizer. Using organic-fertilizer N under suitable available soil water could be substitute a part of chemical N fertilizer to broad bean production and this lead to decrease N-losses, increase N use efficiency and saving the environmental pollution with high levels of chemical N-fertilizers
Keywords: (Organic nitrogen, inorganic nitrogen fertilizer, Broad bean, Calcareous soil, Saline irrigation water, Water stress )
