Response of four varieties of broad bean (Vicia faba L.) to bio fertilizer Trichoderma harzianum and Rhizobium leguminosarum

A field experiment was carried out in Salah al-Din Governorate - Shirqat District during the winter season 2021-2022 using the factorial experiment method using the randomized complete block design (R.C.B.D) and with three replications, the first factor included two types of biofertilizers in addition to the comparison treatment (without addition), the second factor It included four varieties of broad bean (Local, Luz de otono, Lunga delle canscine, Aguadulce). The results showed the superiority of broad bean plants treated with the bacterial fertilizer Rhizobium legumeminosarum in the characteristics of branches number.plant^-1 and Leaf area (dcm2.Plant^-1). The varieties also showed a significant difference between them in most of the studied yield traits, as variety Lunga delle canscine was superior in the number of branches, plant height (cm) and leaf area (dm2), and it reached (9.25, 89.42 and 210.6), respectively, compared to the other varieties. While the Luz de otono variety was superior in the trait of chlorophyll content in the leaves, it gave the highest value of (0.083 mg/gm) with significant differences. While the interaction between bacterial and fungal fertilizers with the Italian variety Lunga delle canscine was significantly superior to most of the studied traits. The results indicate that the bacterial fertiliser Rhizobium legumeminosarum and the fungal fertiliser Trichoderma harzanium have a positive role in supporting plant nutrition and crop productivity. This study recommends the use of biofertilizer as a safe alternative to human health and does not cause pollution.