Abou-Amer, A. Lrt Hassan A. Fawyl and Abdel wahab , M.A.S.( 2014). Effect of Mineral Fertilization and Plant Density on Faba Bean (Viciu faba) Production in Siwa OasisAlex. J. Agric. Res. Vol. 59, No.L, pp.79-26, 2074
Abstract: Throughout two successive years (2009 and 2010), field experiments in three completely randomized replications for each treatment were carried out in Tegzerty region at Siwa Oasis, which located at29o 1l'34" N and 25o 32' 11" E. This soil was irrigated by flooded system and affected by inigation water which was slightly saline (1.83 d6/m) while the soil salinity was 4.12 dSlm. Mineral fertilization w€re, 0, 30, 45 and 60 kg P2o5/fed, 0, 40, 60 and 80 kg &O/fed, while one rate of N as 60 kg N/fed for all fieatments except treatment of control. Phosphorus was mixed with organic manure (10 m'/fed) and supplied as a single application, whereas N and K fertilizers were split into three equal doses that were applied after 20, 40 and 60 days from sowing. Seeds offaba (Vicia faba) Rebaya were cultivated in three spaces 15, 20 and 25cm between plants and 40 cm within rows. The obtained results showed that faba bean gave the highest response to increasing rates of P and K fertilizers application when compared with the control (non-fertilized) treatment for all cultivation spaces during the two seasons. The same trend achieved to nutrients content and uptake in shoots and seeds of faba bean in each of cultivation spaces. When the cultivation spaces decreased the yield quantity/fed increased while yield
quality/plant increased. The optimum fertilizers treatment for faba bean crop in three cultivation spaces rvas NP3K3 (60:60:80kg/fed) which recorded 3.77 and 1.99 ton/fed in cultivation spacel, 3.30 and 1.65 ton/fed in cultivation space2,
2.93 and l.5l ton/fed in cultivation space3 for shoots and seeds, respectively. Moreover, the fertilizer treatments in cultivation space3 achieved higher yield qualify than another in spacq and spacel. The results in this study showed that the optimum fertilizer treatment (NPrKr) with cultivation space2 (20cm x 40cm) achieved suitable quatity and quantify yield offaba bean under conditions ofthe studied soil. Deriving multiple regression equations proved to be an efflective tool for predicting the seeds and shoots production offaba bean plants in different cultivation spaces under Siwa Oasis conditions
Keywords: (NPK fertilizers, faba bean, yield, density plant, Salinity, mineral content.)
