ملخص
ABSTRACT: The present study was carried out during the winter seasons of 2013/2014 and 2014/2015 at the Agricultural Research Station, Abbis, Alexandria University, Alexandria, Egypt. The objectives ware to investigate the influence of effect of phosphorus fertilization rate (0,37 and 74 kg P2O5/ha) potassium fertilization rate (0,57 and 114 kg K2O/ha) and faba bean variety (Libyan landrace, Giza 843, Nubariah3, Giza716 and Sakha1) on growth, yield and yield components. The experimental design was split split plot design with four replications. Leaf area index(LAI), crop growth rate(CGR), 100-seed weight, Number of pods/plant, Number of seeds/plant, seed yield/ha(SY) and harvest index(H.I)were characters studied. Phosphorus fertilization levels had significant effect on LAI, and number. of pods /plant in both seasons, and CGR, 100-seed weight and number. of seeds/plant in second season. Concerning the studied potassium fertilization rates, they had significant effect on CGR, 100-seed weight, number. of pods/plant in first season. Cultivars varied significantly in all studied characters, in the two seasons, except SY/ha in the second season. The interaction between phosphorus and potassium had significant effect on LAI, No. of pods/plant, Number. of seeds/plant and SY/ha in second season, and CGR, 100-seed weight and H.I in both seasons, also phosphorus*cultivars interaction had significant effect on LAI, CGR, 100-seed weight, number. of pods/plant in both seasons except number.of seeds/plant in first season and H.I in second season. Potassium*cultivars interaction was significant for the LAI, number. of seeds/plant and SY/ha in first season and CGR,100-seed weight and number.of pods/plant in both seasons. The significant three interactions, in the two seasons on all parameters except H.I in second season and LAI in both seasons. The results indicated that CGR mainfe station was a result for the combined effects of three studied factors.