Effect of timing of first irrigation and application of zinc and manganese on growth and yield of faba bean (Vicia faba, L) Giza Blanca cultivar. [eclectronic resource].

Includes references.

Micro-nutrients application namely zinc and manganese applied to faba bean plants (Giza Blanca cv.) by coating seeds prior to sowing under various water regimes were investigated in field experiments during successive seasons 1999/2000 and 2000/200 I at Nubaria Experimental Station, Agricultural Research Center (ARC). The first irrigation (EI-Mohaya) was applied at three different intervals (two , four and six weeks from sowing irrigation). Doses of 0.00, 0.15 and 0.30 g/kg seeds of both Zn-EDTA and Mn-EDTA were used. Faba bean plants were monitored for' their growth, yield and seed quality characteristics, whereas, the obtained results revealed that growth characters (number of branches/plant, number of leaves/plant, dry weights of stem and leaves) were significantly affected by water regime and micro-nutrients application as well. As faba bean plants gradually suffered from water deficit by delaying first irrigation from two to four and six weeks intervals, all growth and yield characters were dramatically reduced, hence, the greatest growth and yield of faba bean plants were obtained when first irrigation was applied after two wee~s from sowing irrigation. On the other hand, The most pronounced values of growth parameters were obtained from plants received 0.30 g Zn + 0.15 g Mnlkg seeds. Moreover, the same treatment showed the most positive effect on root length, dry weight of root, number of nodules formed on roots and dry weight of formed nodules. Therefore, number of pods/plants at harvest were increased when plants received 0.30 g Zn + 0.15 g Mn/kg seeds when compared to control treatment.

Summary in Arabic.

1