EFFECT OF PHOSPHOROUS AND THIAMINE ON THE VEGETATIVE GROWTH TRAITS OF TWO BROAD BEAN CULTIVARS

Two field experiments were conducted in Al-Nile sub-district (7 km north-east of Babylon province) during the two agricultural seasons (2021) and (2022) in order to study the response of two types of bean cultivars to phosphorous and thiamine and with three replications, where the main plots included the cultivars (Italian Franchi, Spanish Fito),As for the sub plot, it included phosphorous fertilization at four levels (0, 80, 160, 240 kg.ha-1 ), while the sub-sub plot were sprayed with thiamine at a concentration (0, 100 , 200 mg.L-1). The results were statistically analyzed using Genestat program and the averages were compared on the basis of the least significant difference LSD 0.05. The results can be summarized as follows: 1- The studied cultivars differed significantly in the indicators of vegetative growth, yield and quality for all of both seasons of the study, where the Franchi cultivar was significantly excelled on the Fito cultivar in the studied traits by registering the highest averages for the studied traits, where the chlorophyll content in the leaves reached (35.64 and 38.48 (SPAD), leaf area ( 31.78 and 34.29) cm²,The number of branches per plant (6.91 and 7.02) per plant¯¹, plant height (114.41 and 122.75) cm, pod length (21.76 and 22.00) cm, green pod weight (57.71 and 59.46) gm for both seasons. 2- The treatment of adding phosphorus (240 kg ¯¹) was significantly excelled on the rest of the additions in terms of vegetative growth, yield and quality indicators for all of both seasons, where it recorded the highest averages for the studied traits, including the content of chlorophyll in leaves (37.98 and 41.86) SPAD, Leaf area (39.78 and 40.16) cm², number of branches per plant (7.27 and 7.52) per plant¯¹, plant height (109.28 and 114.88) cm, pod length (23.02 and 23.96) cm, green pod weight (60.67 and 60.26) g for both seasons. 3- The addition of thiamine caused a significant increase in all indicators of vegetative growth, yield and quality, especially the concentration (200 mg L¯¹) by recording the highest averages for the studied traits, where the chlorophyll content in the leaves reached (35.52 and 38.55) SPAD, leaf area (32.65 and 33.99) cm²,The number of branches per plant is (6.54 and 6.70) per plant¯¹, the plant height (104.27 and 109.76) cm, the pod length (24.77 and 25.97) cm, the weight of the green pod is (53.37 and 54.21) gm for both seasons. 4- The triple interaction treatment (Franchi cultivar, 240 kg h¯¹ and 200 mg l¯¹) was significantly excelled in all indicators of vegetative growth, yield and quality, where the studied traits gave the highest averages for the studied traits, where the chlorophyll content in the leaves reached (40.50 and 44.00) SPAD, leaf area (20.19 and 20.47 cm²),The number of branches per plant (8.57 and 8.77), one plant branch, plant height (129.17 and 130.40) cm, pod length (29.47 and 30.03) cm, green pod weight (70.33 and 71.13) g for both seasons.