Jacklin G. Sadek( 2010). THE EFFECTIVENESS OF NITROGEN FERTILIZER,
BIOFERTILIZER AND MICRONUTRIENTS ON YIELD OF FABA BEAN (VICIA FABA)
Minufiya J.Agric. Res. Vol.35 No. 5:1911-1930
Abstract: Two field trials were carried out at Kafr El- Zayiat center, Gharbia Governorate, during two successive seasons of 2008/ 2009 and 2009/ 2010 to identify the integrated effect of two nitrogen rates (0.0 and 20 kg N/fed.), Rhizobium inoculation which contain nitrogen fixing bacteria and some micronutrients mixture (Zn+ Mn+ Fe), added solely or together for improving the yield of faba bean variety i.e. Sakha 3. The tested micronutrients were in the form of EDTA, i.e. Zn- EDTA (14% Zn); Mn-EDTA (12% Mn) and Fe-EDTA (13% Fe) at a rate of 0.3, 0.15, 0.3 g/l, respectively as well as their solution were sprayed on the plants twice at volume of 400 l/fed. after 45 and 70 days from sowing. The obtained results demonstrated that increasing the level of nitrogen fertilizer from 0.0. to 20 kg N/fed. surpassed control in increasing significantly in either stems or leaves and roots dry weights. Roots were the most organs affected by different treatments. Significant increases in chlorophyll a, b and carotenoids after 60 days from sowing. Significant increases in faba bean yield, where the percentage of increase in seed yield reached to 39.72 and 40.74% for first and second seasons, respectively. Corresponding increases significantly in macronutrients, micronutrients concentrations and uptake, crude protein and carbohydrates in seeds and stems for two seasons.Data also indicate that addition of the micronutrients at physiological stage; likewise, Rhizobium inoculation simultaneously induced increases significantly of all studied parameters as well as their values were maximized as results of the combination with nitrogen fertilizer at 20kgN/fed. Moreover, the beneficial effects of the applied treatment included full recommended dose of nitrogen fertilizer (20kgN/fed.) plus Rhizobium inoculation and micronutrients (Zn+ Mn+ Fe) cleared through enhancing the plants growth, and in turn increasing crop yield due to more available and easily mobile of the tested nutrients toward roots and their uptake by plants. Such favourable conditions reflected positively on developments of nutrients concentrations in the seed yield of faba bean.
Keywords: (Faba bean, nitrogen fertilizer, Rhizobium inoculation, micronutrients fertilizer (Zn+ Mn+ Fe))
