Abstract
A field experiment was conducted in one of the agricultural fields in the area of Zouayt, Sityih, Ramadi, Anbar province during the winter seasons of 2017 and 2018. The region of growth traits in some genotypes deferent for faba bean. According to split-split plot design in (R.C.B.D) with three replicates was used , where The study included four concentrations of thiamine (0, 50, 100 and 150) mg L-1 While the included two plant densities (25 and 35 cm). The transactions under secondary included four genotypes of the faba bean (American, Turkish, Netherlands and Italian). The results showed a clear effect of the spray treatments in the concentrations of thiamine in most of the studied traits. As for the genotypes, the American genotype gave the highest mean of most growth, yield and quality characteristics such as crop growth rate 8.51 g.m-2 .day-1 for second season, leave area, relative growth rate, seed yield and carbohydrates ratio (3949 , 4389 cm2 and 0.034, 0.019 g m-2 day -1 and 3.48, 2.62 tan ha. and 58.36, 57.62%) both two season respectively. As for plant densities, plant densities (25 cm) were higher in most studied traits such as crop growth rate 7.08 g m-2 day-1, for second season. relative growth rate, seed yield and carbohydrates ratio (0.033, 0.019 g m-2 day-1 and 2.93, 2.62 tan ha and 57.74, 56.87%) both season respectively. While a concentration of 50 mg L-1 the highest average seed yield 2.56 tan ha. for second season, number of branches and carbohydrates ratio (6.56, 6.92 branch plant and 58.54, 57.42%) both season respectively. The genotype American and plant density low showed the highest mean for study traits such as leave area 3984 and 3461 cm2 for two season respectively and carbohydrates ratio 57.62% for second season. Interaction between genotype and thymine concentrations genotype American whine interaction with concentration 50 ml L record average high in trait leave area, relative growth rate and carbohydrates ratio (4338, 4833 cm2 and 0.039, 0.021) g m-2 day-1 and 59.50, 58.35 %) both two season respectively. While plant density high with control treatment (concentration 0) average high for trait crop growth rate 7.48 g m-2 day-1 for second season and seed yield 3.25 and 2.92 tan ha. two season respectively.
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